Seat Leon (2023 year). Manual in english

Storing objects

301

Trailer mode

WARNING

The incorrect use of a rear carrier system in-
stalled on the tow hook can cause accidents
and injury.

●

Make sure that the carrier system is suita-

ble for your vehicle.

●

Read and observe the installation instruc-

tions of the rear carrier system manufacturer.

●

Never attach a rear carrier system below

the ball head of the trailer hitch. The system
could slip due to the shape of the hitch.

Note

Before setting off, SEAT recommends remov-
ing, to the extent possible, all accessories
from the load attached to the carrier system.
Examples of these accessories are baskets
and panniers, child seats or batteries. This
improves the aerodynamics and centre of
gravity of the rear carrier system.

Retrofitting a towing bracket

Fig. 201

Limits and attachment points for

retrofitting a towing bracket.

Distance measurements

(measurements can

vary depending on the different chassis combi-
nations):

Mounting points on the vehicle

65 mm (minimum)

350 mm to 420 mm (fully laden vehicle)

1,043 mm

344 mm / 333 mm (PHEV)

564 mm / 553 mm (PHEV)

885 mm (Leon) / 874 mm (Leon
PHEV) / 1.162.5 mm (Leon Sportstourer) /
1.151.5 mm (Leon Sportstourer PHEV)

SEAT recommends that towing brackets be ret-
rofitted at a specialised workshop. For exam-
ple, it may very well be necessary to adjust
the cooling system or mount thermal protection
plates. SEAT recommends visiting a SEAT deal-
ership for this.
If a towing bracket is retrofitted, the distance
specifications should always be kept in mind.
The distance between the centre of the ball
head and the road

›››

Fig. 201

must never

be less than that indicated. This also applies
when the vehicle is fully loaded, including the
technically permissible maximum vertical load
on the coupling device.

CarManuals2.com

302

Storing objects

WARNING

If the cables are improperly or incorrectly
connected, this may lead to malfunctions in
the entire vehicle electronic system, as well
as to accidents and serious injuries.

●

Never connect the trailer's electric sys-

tem to the electrical connections of the tail
lights or any other unsuitable power sources.
Only use suitable connectors to connect the
trailer.

●

The towing bracket should be retrofitted

only at a specialised workshop.

WARNING

If the towing bracket is badly fitted or unsuit-
able, the trailer may separate from the ve-
hicle while driving. This could cause serious
accidents and fatal injuries.

Note

●

According to regulation EU2021_535 it is

not permitted to install a towing device that
cannot be removed or retracted.

●

Only use towing brackets that have been

approved by SEAT for the model in question.

●

In some versions, the fitting of a conven-

tional towing hook solution is not recommen-
ded. Please consult your Technical Service.

CarManuals2.com

Fuel and exhaust gas cleaning

303

Refuelling

Depending upon country.

Fuel and exhaust gas
cleaning

Refuelling

Safety warnings regarding fuel han-
dling

WARNING

Fuel is highly flammable and can cause seri-
ous burns and other injuries.

●

When refuelling, turn off the engine and

turn off the ignition for safety reasons.

●

The fuel system of PHEV models is pressur-

ized to prevent petrol vapours from escaping
into the atmosphere.

●

Do not smoke when filling the fuel tank or

a canister. Naked flames are forbidden in the
vicinity due to the risk of explosion.

●

Observe legislation governing the use,

storage and carrying of a spare fuel canister
in the vehicle.

●

For safety reasons we do not recommend

carrying a spare fuel canister in the vehicle.
In an accident the canister could be dam-
aged and could leak.

●

If, in exceptional circumstances, you have

to carry a spare fuel canister, please observe
the following points:

–

Never fill fuel into the spare fuel canister

if it is inside or on top of the vehicle. This
could cause an explosion. Always place
the canister on the ground to fill it.

–

Insert the filling nozzle as far as possible

into the spare fuel canister.

–

If the spare fuel canister is made of

metal, the filling nozzle must be in contact
with the canister during filling. This helps
prevent an electrostatic charge building
up.

–

Never spill fuel in the vehicle or in the

luggage compartment. Fuel vapour is ex-
plosive. Risk of fatal accident!

NOTICE

●

If any fuel is spilt onto the vehicle, it should

be removed immediately. It could otherwise
damage the paintwork.

●

Never run the tank completely dry. The

catalytic converter can be damaged.

●

When filling the fuel tank after having run

it completely dry on a vehicle with a diesel
engine, the ignition must be switched on for
at least 30 seconds before starting the en-
gine. When you then start the engine it may
take longer than normal (up to one minute) to
start firing.

For the sake of the environment

Do not overfill the fuel tank, it may cause the
fuel to overflow if it becomes warm.

Note

There is no emergency mechanism for the
manual release of the fuel tank flap. If nec-
essary, request assistance from specialised
personnel.

Note

Diesel vehicles are fitted with a protective
device that prevents the insertion of the
wrong fuel hose

. It is only possible to refuel

with Diesel nozzles.

●

If the pump nozzle is worn, damaged, or if

it is very small, it is possible that it will not
be able to open the protective device. Before
trying to insert the pump nozzle by turning
it, try a different pump or request specialist
help.

●

If you fill the tank from a reserve fuel canis-

ter, the protective device will not open. One
way to resolve this is to pour the fuel in very
slowly.

CarManuals2.com

304

Fuel and exhaust gas cleaning

Refuelling

Fig. 202

Fuel tank flap with tank cap

attached.

The fuel tank flap is on the rear right of the
vehicle.

●

The tank flap is unlocked when the car is un-

locked using the central locking remote control

›››

page 93

Hybrid vehicles:

Use the button on the driver’s

door to release the tank flap

›››

page 304

●

Open the fuel tank flap by pressing on the

retainer zone.

●

Unscrew the cap by turning it to the left.

●

Place it in the space on the hinge of the open

flap

›››

Fig. 202

●

Start refuelling. The tank is full as soon as

the pump’s automatic nozzle cuts off the fuel
supply. Do not try to put in more fuel after the
nozzle cuts out, as this will fill the expansion
chamber in the fuel tank.

●

Unscrew the cap by turning it to the right as

far as it will go.

●

Close the lid.

The correct fuel grade for your vehicle is given
on a sticker on the inside of the fuel tank
flap. Further notes on fuel can be found at

›››

page 306

The capacity of your vehicle's fuel tank is given
in

›››

page 380

Hybrid vehicles

Every 6 months it is necessary to run on petrol
until the control lamp switches off and then
the tank must be refilled. This is necessary to
ensure that the system works properly, as well
as the fuel quality required for driving with pet-
rol.

Vehicles with a natural gas engine

Purging the fuel tank

✓

Valid for: hybrid vehicles.

Fig. 203

Driver’s door: tank cover release.

Before refuelling the fuel system must be dep-
ressurised

›››

Safety warnings regarding

fuel handling

on page 303

. To do this, press the

button on the driver’s door.

An audible sound will be played and a warning
will be displayed on the instrument cluster dis-
play.
After a few seconds the fuel tank flap will un-
lock and remain unlocked for a few minutes. If
you have not refuelled after this time, you must
press the button again before refuelling.
Avoid touching the fuel tank flap lock button

›››

Fig. 202

(arrow). The system will interpret

that you have finished and cannot continue re-
fuelling. Press the button on the driver’s door
again to continue.

CarManuals2.com

Fuel and exhaust gas cleaning

305

Refuelling

Refuelling natural gas

Fig. 204

Tank flap open: gas filler mouth

filler mouth retainer

Before

refuelling, the engine and the igni-

tion, mobile telephone and heating must be
switched off separately

›››

Read the instructions on how to use the natural
gas pump carefully.

Refuelling

The natural gas filler mouth is behind the
fuel tank cap, next to the petrol filler mouth

›››

Fig. 204

●

Remove the plug from the gas filler mouth

●

Connect the pump filling nozzle to the gas

filler mouth.

●

The fuel tank will be full when the pump com-

pressor automatically cuts the supply.

●

If you wish to finish refuelling in advance,

press the button on the pump to stop the flow.
If the ambient temperature is very high, the nat-
ural gas pump’s overheating protection discon-
nects it automatically.

Closing the fuel tank cap

●

Check that the gas filler mouth retainer

is not trapped with the filler nozzle. If this hap-
pens, replace it in the filler mouth.

●

Insert the plug in the filler mouth.

●

Close the tank flap. Make sure you hear it

click into place.

WARNING

Natural gas is a highly explosive, easily flam-
mable substance. Incorrect handling of the
natural gas can cause accidents serious
burns and other injuries.

●

Before refuelling with natural gas, engage

the filling mouth correctly. If you can smell
gas, stop refuelling immediately.

●

Read and take note

WARNING

The vehicle is not suitable for liquefied natu-
ral gas (LNG) or liquefied petrol gas (LPG),
so LNG or LPG should not be used under any
circumstances. Liquid gas can cause an ex-
plosion of the natural gas tanks and cause
severe injuries!

WARNING

If the vehicle underbody touches the ground
or in the event of a rear collision, there could
be damage to the natural gas tanks. If dam-
aged, natural gas tanks are full of fuel and
can explode, causing serious or fatal injuries.

●

Even if you don't notice the smell of gas,

take the vehicle to a specialised workshop
immediately and have the natural gas sys-
tem checked. Do not refuel natural gas again
until the natural gas system has been in-
spected.

Note

●

The filling nozzles of natural gas pumps

can differ in the way they are operated. Ask a
qualified employee at the petrol station to do
the refuelling if you do not know how.

●

Noises heard when refuelling are normal

and do not indicate damage in the system.

CarManuals2.com

306

Fuel and exhaust gas cleaning

Depending upon country.

Follow the regulations of the country you are driving in.

●

The vehicle natural gas system is prepared

both for refuelling with a small compressor
(slow refuel) and a large compressor (fast
refuel) at natural gas service stations.

Fuel types

Identification of fuels

Fig. 205

Identification of fuels according to

European Union (EU) Directive 2014/94/

Fuels are identified by different symbols on
the pump and on your vehicle's tank flap. The
identification serves to prevent confusion when
choosing the fuel.

Petrol

with ethanol (“E” stands for

thanol).

The number indicates the percentage of
ethanol in the petrol. “E5” means, for exam-
ple, an ethanol ratio of 5% max.

Diesel

according to EN590 standard. The

number indicates the maximum percent-
age of Biodiesel in the fuel. “B7” means a
maximum of 7% Biodiesel.
Synthetic

diesel

according to EN15940

standard.

Natural gas

: “CNG” means

ompressed

atural

Type of petrol

The correct grade of petrol is listed inside the
fuel tank flap.
The vehicle is equipped with a catalytic con-
verter and must only be run on

unleaded pet-

rol

. The petrol must comply with the standard

EN 228 and be

sulphur-free

. Fuels with a 10%

ethanol ratio can be refuelled (E10)

. The types

of petrol are differentiated by using the

octane

numbers (RON)

or via the

anti-knock index

(AKI)

Super unleaded petrol 95 octane petrol or
normal 91 octane petrol at least

We recommend refuelling with super 95 octane
petrol (91 AKI). If not available, normal 91 oc-
tane petrol (87 AKI) (with a slight power loss)
may be used.

Super unleaded petrol, 95 octanes at least

You should use super 95 octane petrol (91 AKI)
at least.
If super petrol is not available, if necessary, use
normal 91 octane petrol (87 AKI). In this case
only use moderate engine speeds and a light
throttle. Refuel with super as soon as possible.

Unleaded super plus 98 octane petrol or su-
per 95 octane petrol at least

We recommend refuelling with super plus 98
octane petrol (93 AKI). If not available: super 95
octane petrol (91 AKI) (with a slight power loss).
If super petrol is not available, if necessary, use
normal 91 octane petrol (87 AKI). In this case
only use moderate engine speeds and a light
throttle. Refuel with super as soon as possible.

CarManuals2.com

Fuel and exhaust gas cleaning

307

Fuel types

This motor is only available in some markets.

Depending upon country.

NOTICE

●

Fuels with a high percentage of ethanol,

e.g. E30 - E100 button must not be used. The
fuel system would be damaged.

●

A single refuelling with leaded fuel or other

metal additives entails a permanent deterio-
ration of the effectiveness of the catalytic
converter.

●

Only use fuel additives that have been ap-

proved by SEAT. The products that contain
substances to increase the octane rating or
decrease knocking may contain metal addi-
tives that damage the engine and catalytic
converter. This type of products must not be
used.

●

Do not use fuels shown in the pump as

containing metals. LRP (

lead replacement

petrol

) fuels contain high concentrations of

metal additives. Risk of engine damage!

●

High engine speed and full throttle can

damage the engine when using petrol with
an octane rating lower than the correct
grade for the engine.

Note

●

Fuel with an octane rating higher than the

one required by the engine can be used.

●

In countries in which there is no sulphur-

free fuel, it is also allowed to use low sulphur
content fuel.

Ethanol fuel

✓

Valid for: vehicles with Totalflex engines

You can recognise vehicles with Totalflex en-
gines

by label on the fuel tank lid with the

marking “Petrol/ethanol”.
Vehicles with Totalflex engine can run with un-
leaded petrol (95 octane / 91 AKI) according
to ANP No. 57 and with fuels with any high per-
centage of ethanol. The vehicle is refuelled in
the same way as petrol refuelling.

Note

SEAT recommends filling the tank exclusively
with petrol every 10,000 km to decrease im-
purities that using E100 ethanol fuel might
have left in the engine.

Diesel

✓

Valid for: vehicles with diesel engines

Please note the information on the inside of the
fuel tank flap.
The diesel can thicken at very low tempera-
tures, thus affecting the start or operation of
the engine. Ask your service station attendant if
their diesel is suitable for winter use.

Water in the fuel filter

If your vehicle has a diesel engine and is equip-
ped with a

fuel filter with a water separator

the instrument panel may display the following
warning:

Water in the fuel filter.

If this is the case, take the vehicle to a special-
ised workshop so that they can drain the fuel
filter.

NOTICE

●

Never use of FAME (biodiesel that does not

meet the EN590 standard), petrol, heating
oil, other fuels or thinning agents as they can
cause severely damage the fuel system and
the engine.

●

If the wrong fuel has been filled, do not

start the engine under any circumstances.
Risk of damaging the fuel system and the en-
gine! Seek professional assistance.

Natural gas

✓

Valid for: vehicles with natural gas engines

Natural gas can be compressed or in liquid
form, addition to others.

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308

Fuel and exhaust gas cleaning

Use of compressed natural gas (CNG)

Vehicles with natural gas engines must only
be run on

CNG

(Compressed Natural Gas), or

CNG

with a

biomethane

if this meets the EN

16723-2 standard.
Fuels such as liquefied natural gas (LNG), lique-
fied petroleum gas (LPG) or hithane (mixture of
hydrogen and methane) should not be used to
fill the tank.

Natural gas quality and consumption

Natural gas is divided into the groups H and L
depending on its quality.
Gas type H has a superior heating power and
inferior nitrogen and carbon dioxide content
than type L. The higher the heating power of
the natural gas, the lower the consumption will
be.
The engine management automatically adapts
to the natural gas used according to its quality.
Therefore, different quality gases can be mixed
in the tank, without the need for comprehensive
draining before applying a different quality gas.
Updated information relating to natural gas
quality is shown on the instrument cluster dis-
play.

Regular checks of the natural gas system

The natural gas tanks may be damaged or cor-
roded by external factors. The walls of the gas
tanks are weakened by deformations, damage
or corrosion. The vehicle owner must have a

specialised workshop check (visual check)

the

gas system at least once every 4 years

. Nat-

ural gas tanks must be replaced at a special-
ised workshop.

WARNING

Failure to act when you can smell gas in the
vehicle or when refuelling can cause serious
injuries.

●

Stop the vehicle immediately.

●

Switch the ignition off.

●

Open the doors to appropriately ventilate

the vehicle.

●

Extinguish cigarettes immediately.

●

Move away from the vehicle or switch off

objects that may cause sparks or a fire.

●

If you continue to smell gas, do not con-

tinue driving!

●

Seek specialist assistance. Have the fault

repaired.

●

If necessary, warn the emergency services.

WARNING

Damaged, corroded or rusted tanks can re-
sult in serious injury or even death.

●

Have the natural gas deposits checked at

least every 4 years (visual check).

●

Natural gas tanks have a limited service

life. Have the natural gas tanks replaced
when required. You can obtain further infor-
mation about this at SEAT dealers or special-
ised workshops.

AdBlue®

Information about AdBlue®

AdBlue® consumption depends on your per-
sonal driving style, the temperature of the sys-
tem and the outdoor temperature when the ve-
hicle is used.
AdBlue® freezes at temperatures of -11 °C
(+13°F). The system has heating elements that
guarantee its operation even at low tempera-
tures.
When the

range is less than 2400 km

the

instrument cluster screen displays a message
requesting an AdBlue® refill.
If this message is ignored, the yellow warning
lamp will come on when the

remaining range

is less than 1000 km.

. The indication that

in XXX km it will no longer be possible to restart
the engine will appear on the instrument panel
display.
If the yellow indicator lamp is ignored, when a

remaining range of 0 km

is displayed, it will no

longer be possible to restart the engine. The red
warning lamp will light up .
AdBlue® is a registered trademark of the Ger-
man Association of the Automotive Industry
(VDA) and is also known as AUS32 or DEF (Die-
sel Exhaust Fluid).

CarManuals2.com

Fuel and exhaust gas cleaning

309

AdBlue®

NOTICE

Overfilling with AdBlue® can cause damage
to the tank system.

Fill AdBlue®

Fig. 206

AdBlue tank cap®.

Operations prior to refilling

Park the vehicle on a flat surface and turn off
the ignition. If the vehicle is on a slope or on a
curb, the level indicator may not detect the refill
properly.
If an AdBlue® warning message is shown on the
instrument cluster display,

fill with at least the

minimum required amount (approx. 5 litres)

Only after adding this amount will the system
detect that AdBlue® has been added and you
will be able to start the engine again.

Fill with a refill bottle

Only use AdBlue® that complies with the ISO
22241-1 standard.

●

Only use original containers.

●

Open the tank cover

›››

Fig. 206

●

Unscrew the tank cap by turning it in an anti-

clockwise direction.

●

Please observe the manufacturer's instruc-

tions, indicated on the refill bottle.

●

Check the expiry date.

●

Remove the cap of the refill bottle.

●

Insert the neck of the bottle in the tank filler

neck vertically and screw the bottle on by
hand, by turning it in a clockwise direction.

●

Press the refill bottle in the direction of the

filler neck and hold it in this position.

●

Wait until the contents of the refill bottle have

been poured into the AdBlue® tank. Do not
compress or break the bottle!

●

Turn the bottle in a counter-clockwise direc-

tion and gently pull it upwards

›››

page 309

●

The AdBlue® tank is full when no more liquid

comes out of the bottle.

●

Screw on the tank cap in a clockwise direc-

tion until it is tightly closed.

●

Close the fuel tank flap.

Refilling AdBlue® at the dispenser

Valid for vehicles with selective catalytic reduc-
tion.

●

Open the tank cap.

●

Turn the SCR tank cap anti-clockwise

›››

Fig. 206

●

Fill with AdBlue® until the nozzle stops for the

first time.

●

Close the SCR tube by turning it clockwise

until you hear a click.

Operations before driving

●

After refilling the tank, only switch on the igni-

tion.

●

Leave the ignition on for at least 30 seconds

for the system to detect the fluid load.

●

Make sure you wait for at least 30 seconds

before starting the engine!

WARNING

AdBlue® should only be stored in its origi-
nal container, which should be tightly closed
and kept in a safe place.

NOTICE

●

When refilling, the nozzle grip should be

aligned downward. Otherwise the nozzle will
not connect automatically.

●

Do not try to add any more additive after

the nozzle has stopped for the first time. The
AdBlue® tank could overflow and AdBlue®
could spill out.

CarManuals2.com

310

Fuel and exhaust gas cleaning

●

Only use AdBlue® that complies with the

ISO 22241-1 standard. Only use original con-
tainers.

●

Never mix AdBlue® with water, fuel or addi-

tives. Any type of damage caused by such a
mixture will not be covered by the warranty.

●

Never pour AdBlue® into the fuel tank! This

could result in engine damage.

●

Do not carry the refill bottle inside the

vehicle. If there is a leak (due to tempera-
ture changes or damage to the bottle), the
AdBlue® may damage the vehicle's interior.

For the sake of the environment

Dispose of the refill bottle in an environment-
friendly manner.

Note

Suitable AdBlue® refill bottles can be pur-
chased from SEAT dealerships.

Troubleshooting

AdBlue® level too low

The indicator lamp lights up red.

The engine

cannot be restarted!

Stop the vehicle in a suitable, safe and flat area
then top up with the minimum required quantity
of AdBlue®

›››

page 309

together with

: Fault in the AdBlue

system®

The indicator lamps light up red.

The engine

cannot be restarted!

Go to a specialised workshop and get the sys-
tem checked.

The AdBlue® reserve is low

The indicator lamp lights up yellow.
To up AdBlue® within the number of kilometres
(or miles) that are indicated

›››

page 309

together with

: Fault in the

AdBlue® system.

The control lamps light up yellow. There is a
fault in the AdBlue® system or non-conforming
AdBlue® fluid has been added. Go to a special-
ised workshop and get the system checked.

Engine management and
emissions control system

Introduction

WARNING

Due to the high temperatures reached by the
exhaust gas scrubbing system, you should
not park your vehicle near a surface that can
catch fire easily. Fire hazard!

WARNING

Do not apply wax underneath the vehicle
around the area of the exhaust system: Fire
hazard!

Catalytic converter

To maintain the useful life of the catalytic
converter

●

Only use unleaded petrol with petrol en-

gines.

●

Never run the fuel tank dry.

●

When changing or adding engine oil, do not

exceed the necessary amount

›››

page 336,

Checking and topping up the engine oil level

●

Never tow the vehicle to start it, use jump

leads if necessary

›››

page 315

If you should notice misfiring, uneven running or
loss of power when the car is moving, have the
vehicle inspected by a specialised workshop.
In general, the emissions warning lamp will
light up when any of these symptoms occur. If
this happens, any unburnt fuel can enter the ex-
haust system and escape into the atmosphere.
The catalytic converter can also be damaged
by overheating.

CarManuals2.com

Fuel and exhaust gas cleaning

311

Engine management and emissions control system

Except 2.0l and 2.5l TSI petrol engines.

NOTICE

Never run the fuel tank completely dry be-
cause an irregular fuel supply can cause ig-
nition faults. This allows unburnt fuel to enter
the exhaust system, which could cause over-
heating and damage the catalytic converter.

For the sake of the environment

Even when the emission control system is
working perfectly, there may be a smell of
sulphur from the gases on occasions. This
depends on the sulphur content of the fuel
used. This can quite often be avoided by
changing to another brand of fuel.

Particulate filter

Valid for: vehicles with petrol or diesel particu-
late filters

The particulate filter eliminates most of the
soot from the exhaust gas system. Under nor-
mal driving conditions the filter cleans itself.
If the filter does not clean itself (e.g. if short
journeys are made continuously), it becomes
blocked with soot and the following indication is
displayed to the driver:

Particulate filter: cleaned

while the vehicle is moving. See
Manual.

The particulate filter needs cleaning (regenera-
tion).

Regeneration of the petrol and diesel partic-
ulate filter

Requirements for the regeneration journey:

the

engine is at operating temperature.

●

Drive at a speed of between 50120 km/h

(31-75 mph). This increases the temperature
and burns the soot in the filter

›››

page 311

●

Consider the legal speed limits as well as the

recommended gears.

●

End the regeneration journey once the con-

trol warning lamp has gone out.
If the warning lamp stays on after 30 minutes
of running in regeneration mode, have a speci-
alised workshop repair the fault.

Regeneration of the particulate filter (only
for 2.0l and 2.5l TSI engines)

Requirements for the regeneration journey:

the

engine is at operating temperature.

●

Drive at a speed of at least 80 km/h

›››

page 311

●

Completely remove your foot from the accel-

erator pedal for a few seconds to let the vehicle
roll with the gear engaged.

●

Consider the legal speed limits as well as the

recommended gears.

●

Repeat this procedure (accelerate and let

roll) until the control lamp turns off.
This procedure involves an autonomous par-
ticulate filter cleaning process and may take
some time.
If the warning lamp

does not turn off

, go imme-

diately to a specialised workshop to repair the
fault.

WARNING

Always adjust your speed to suit the weather
conditions, roads, braking distance and traf-
fic if the particulate filter is in its regeneration
phase. Route recommendations should never
make you disregard each country's specific
traffic regulations.

Note

If during the particulate filter regeneration
process you also get a fuel reserve warning

, the process may be interrupted. Refuel

and continue with the particulate filter re-
generation process.

CarManuals2.com

312

Fuel and exhaust gas cleaning

NOTICE

●

When the exhaust system detects that the

particulate filter is close to saturation, the
self-cleaning function of this system recom-
mends optimal driving for this function.

●

Due to the high temperatures caused by

the regeneration of the particulate filter, it is
possible that the radiator fan will activate af-
ter stopping the engine, even it its operating
temperature has not been reached.

●

Noise, smells and high idle speeds can oc-

cur during regeneration.

●

Always use the correct engine oil and the

correct fuel to make sure the useful life of the
particulate filter is not affected. Also avoid
making short trips all the time.

Troubleshooting

Fault in the emissions control system

The indicator lamp lights up yellow.
Reduce speed and drive carefully to the near-
est specialised workshop to have the engine
checked.

Combustion failures that could dam-

age the catalytic converter

The control lamp flashes yellow.
Reduce speed and drive carefully to the near-
est specialised workshop to have the engine
checked.

Particulate filter clogged

The indicator lamp lights up yellow

›››

page 311

Petrol engine management fault

The indicator lamp lights up yellow.
Have the engine checked as soon as possible
by a specialised workshop.
When the ignition is switched on, the

(Elec-

tronic Power Control) lamp lights up and should
go off once the engine has started.

Diesel engine preheating system

The indicator lamp lights up yellow.
The engine can be started straight away when
the lamp switches off.

Diesel engine management fault

The control lamp flashes yellow.
Have the engine checked as soon as possible
by a specialised workshop.

NOTICE

While the indicator lamps

, ,

are on, there might be faults in the engine,
fuel consumption may go up and the engine
might lose power.

CarManuals2.com

Miscellaneous situations

313

Changing the windscreen wiper blades

Miscellaneous situa-
tions

Vehicle tool kit

On-board toolkit

Fig. 207

Underneath the floor panel of the

luggage compartment: on-board tools.

The vehicle tool kit is located under the floor
panel in the luggage compartment. To access
the on-board tools

›››

page 281

The tool kit includes:

Adapter for the anti-theft bolt
Towing eye, removable
Wheel spanner
Crank handle for jack
Jack

Hook for extracting the central wheel trims
Clip for removing the wheel bolt caps

Some of the items listed are only provided in
certain model versions, or are optional extras.

WARNING

When the vehicle tool kit, tyre mobility set
and spare wheel are loose in the interior they
can be violently thrown in case of a sudden
manoeuvre or braking and especially in acci-
dents, causing serious injury.

●

Ensure that the vehicle tool kit, the tyre

mobility set and the spare wheel or tempo-
rary spare wheel are safely secured in the
luggage compartment.

WARNING

Unsuitable or damaged vehicle tools can
cause injury or accidents.

●

Never work with inappropriate or damaged

tools.

Note

The jack does not generally require any
maintenance. If required, it should be
greased using universal type grease.

Changing the windscreen
wiper blades

Wiper service position

Fig. 208

Wipers in service position.

Ensure that the wiper blades are not frozen.
With the wiper in service position, it is possible
to the fold the wiper arms

●

●

Switch the ignition on and off.

●

Briefly press the wiper lever downwards.

Before driving, always lower the wiper arms. Us-
ing the windscreen wiper lever, the windscreen
wiper arms return to their initial position.

CarManuals2.com

314

Miscellaneous situations

Note

●

The wiper arms can be moved into the re-

placement position when the front bonnet is
fully closed.

●

You can also use the service position, for

example, if you want to fix a cover over the
windscreen in the winter to keep it clear of
ice.

Changing the wiper rear wiper
blades

Fig. 209

Changing the windscreen wiper

blades

The windscreen wiper blades are supplied as
standard with a layer of graphite. This layer is
responsible for ensuring that the wipe is silent. If
the graphite layer is damaged, the noise of the
water as it is wiped across the windscreen will
be louder.

Check the condition of the wiper blades regu-
larly.

If the wipers scrape across the glass

they should be changed if they are damaged,
or cleaned if they are dirty

›››

If this does not produce the desired results,
the setting angle of the windscreen wiper arms
might be incorrect. They should be checked by
a specialised workshop and corrected if neces-
sary.
Damaged windscreen wiper blades should
be replaced immediately. These are available
from qualified workshops.

Raising and lowering windscreen wiper arms

●

Place the windscreen wipers in the service

position

›››

page 313

●

Grip the wiper arms

only

by the blade's fas-

tening point.

Cleaning windscreen wiper blades

●

Raise the wiper arms.

●

Use a soft cloth to remove dust and dirt from

the windscreen wiper blades.

●

If the blades are very dirty, a sponge or damp

cloth may be used

›››

Changing the windscreen wiper blades

●

Lift and unfold the wiper arms.

●

Press and hold release button

›››

Fig. 209

and pull gently on the wiper blade in the

direction of the arrow.

●

Fit a new wiper blade of the

same length

and design

on to the wiper arm and hook it into

place.

●

Rest the wiper arms back onto the wind-

screen.

Changing the rear window wiper blade

●

Separate the wiper arm from the rear win-

dow.

●

Remove the blade from the holder below the

centre. During this operation, hold the wiper
arm firmly.

●

Fit the new blade (of the same length and

type) into the housing of the wipe arm by press-
ing it in place. When doing so, hold the wiper
arm by the upper end.

●

Fold the wiper arm and rest it on the window.

WARNING

Worn or dirty windscreen wiper blades re-
duce visibility and increase the risk of acci-
dent and serious injury.

●

Always replace damaged or worn wind-

screen wiper blades or blades that no longer
clean the windscreen properly.

CarManuals2.com

Miscellaneous situations

315

Jump start

NOTICE

●

Damaged or dirty windscreen wipers could

scratch the glass.

●

If products containing solvents, rough

sponges or sharp objects are used to clean
the blades, the graphite layer will be dam-
aged.

●

Never use fuel, nail varnish remover, paint

thinner or similar products to clean the win-
dows.

●

In icy conditions, always check that the

wiper blades are not frozen to the glass be-
fore using the wipers. In cold weather, it may
help to leave the vehicle parked with the wip-
ers in service position

›››

page 313

NOTICE

●

To prevent damage to the bonnet and the

wiper arms, only leave them in the service
position.

●

Before driving, always lower the wiper

arms.

Jump start

Introduction

If the engine fails to start because of a dis-
charged 12-volt battery, the battery can be
connected to the battery of another vehicle to
start the engine.

Jump leads complying with the

DIN 72553

standard

are needed for starting (see cable

manufacturer's instructions). The wire cross
section must be at least 25 mm

for petrol en-

gines and at least 35 mm

for diesel engines.

NOTICE

To avoid considerable damage to the vehicle
electrical system, note the following care-
fully:

●

If the jump leads are connected incor-

rectly, a short circuit may occur.

●

Use only jump leads with fully insulated

clamps.

●

Do not allow the vehicles to come into con-

tact with each other, otherwise current may
start to flow as soon as the positive poles are
connected.

Jump start: description

Fig. 210

Diagram of connections for vehicles

without Start Stop system

Fig. 211

Diagram of connections for vehicles

with Start Stop system

The discharged battery must be properly con-
nected to the on-board network.
Make sure the battery clamps have sufficient
metal-to-metal contact with the battery termi-
nals.

CarManuals2.com

316

Miscellaneous situations

10.

11.

Jump lead terminal connections

The jump leads should only be connected in
the order

1 > 2 > 3 > 4

›››

Fig. 211

Switch off the ignition of both vehicles

›››

Connect one end of the

red

jump lead to

the positive

terminal of the vehicle with

the flat battery

Connect the other end of the

red

jump lead

to the positive terminal

in the vehicle

providing assistance

Vehicles without a Start-Stop system:

con-

nect one end of the black jump lead to the
negative terminal

–

of the vehicle provid-

ing the current

›››

Fig. 210

Vehicles with a Start-stop system:

connect

one end of the black jump lead

to a

suitable ground terminal, to a solid piece of
metal in the engine block, or to the engine
block itself

›››

Fig. 211

Connect the other end of the

black

jump

lead

to a solid metal component bolted

to the engine block or to the engine block
itself of the vehicle with the flat battery. Do
not connect it to a point near the battery

Position the leads in such a way that they
cannot come into contact with any moving
parts in the engine compartment.

Starting

Start the engine of the vehicle with the
boosting battery and let it run at idling
speed.
Start the engine of the vehicle with the flat
battery and wait for 2 or 3 minutes until the
engine is running.

Removing the jump leads

Before you remove the jump leads, switch
off the dipped beam headlights if they are
switched on.
Turn on the heater blower and heated rear
window in the vehicle with the flat battery.
This helps minimise voltage peaks which
are generated when the leads are discon-
nected.
When the engine is running, disconnect the
leads in reverse order to the details given
above.

If the engine fails to start after about 10 sec-
onds, switch off the starter and try again after
about 1 minute.

WARNING

●

Please note the safety warnings refer-

ring to working in the engine compartment

›››

page 326

●

The battery providing assistance must

have the same voltage as the flat battery
(12V) and approximately the same capacity
(see imprint on battery). Failure to comply
could result in an explosion.

●

Never use jump leads when one of the bat-

teries is frozen. Danger of explosion! Even
after the battery has thawed, battery acid
could leak and cause chemical burns. If a
battery freezes, it should be replaced.

●

Keep sparks, flames and lighted cigarettes

away from batteries, danger of explosion.
Failure to comply could result in an explo-
sion.

●

Observe the instructions provided by the

manufacturer of the jump leads.

●

Do not connect the negative cable from

the other vehicle directly to the negative ter-
minal of the flat battery. The gas emitted
from the battery could be ignited by sparks.
Danger of explosion.

●

Never attach the negative cable to fuel

system components or the brake lines in the
other vehicle.

●

The non-insulated parts of the battery

clamps must not be allowed to touch. The
jump lead attached to the positive battery
terminal must not touch metal parts of the
vehicle, this can cause a short circuit.

CarManuals2.com

Miscellaneous situations

317

Towing the vehicle

●

Position the leads in such a way that they

cannot come into contact with any moving
parts in the engine compartment.

●

Do not lean on the batteries. This could re-

sult in chemical burns.

●

Take into account the instruction manual of

the jump lead manufacturer and the instruc-
tion manual of the other vehicle.

NOTICE

Immediately go to a specialist workshop and
have the 12 volt battery checked.

Towing the vehicle

Introduction

It takes practice to tow a vehicle, especially
when using a tow cable. Both drivers should be
well informed of the special features of towing.
Inexperienced drivers should refrain from tow-
ing.
During towing, make sure at all times that no
inadmissible traction forces or jolts are gener-
ated. On roads without a firm surface there is
always the danger of overloading the attach-
ment parts.
Take into account the legal provisions regarding
tow starting and towing.

Tow start

Tow starting means starting a vehicle's engine
while another puts it in motion by pulling it.
The vehicle can be towed with a tow bar or
cable

Towing

Towing means a vehicle pulling another vehicle
that is not in a condition to run.
The vehicle can be towed with a tow bar or
cable.

●

The maximum permitted speed is 50 km/h

(30 mph).

●

The maximum permitted distance is 50 km

(30 miles).

Tow cable and tow bar

It is safer for the vehicle to be towed using a tow
bar, avoiding damage to the vehicle. The tow
cable should only be used if a tow bar is not
available.
A tow rope should be slightly elastic to avoid
damage to both vehicles. It is advisable to use
a tow rope made of synthetic fibre or similarly
elastic material.

Tow with a tow truck

If a breakdown lorry is used, vehicles with au-
tomatic transmission are only allowed to be
towed with the front wheels suspended.

Towing vehicles with four-wheel drive
(4Drive)

Four-wheel drive vehicles (4Drive) can be
towed using a tow bar or tow rope. If the vehicle
is towed with the front or rear axle suspended,
the engine must be switched off, otherwise the
transmission may be damaged.

WARNING

During the towing of a vehicle, the driving
behaviour and braking capacity change con-
siderably.

WARNING

Never allow the vehicle to be towed if it has
no power.

●

When towing, never remove the key from

the ignition or disconnect the ignition with
the ignition and start button. Otherwise, the
electronic lock of the steering column could
suddenly get blocked and it would be impos-
sible to steer the vehicle. This could cause an
accident, serious injury and loss of control of
the vehicle.

●

If the vehicle runs out of power during tow-

ing, stop the process immediately and seek
the assistance of specialised personnel.

CarManuals2.com

318

Miscellaneous situations

NOTICE

Towing the vehicle with a tow cable or a tow
bar can cause damage to the vehicle.

●

If the vehicle is towed with a tow cable or

tow bar, special care must be taken.

●

If possible, have the vehicle transported on

a tow truck.

NOTICE

If the vehicle is pushed by hand, the tail light
units, the side spoilers of the rear window
and large sheet metal surfaces may be dam-
aged. In addition, the rear spoiler could be
detached.

●

If the vehicle is pushed by hand, the tail

light units, the side spoilers of the rear win-
dow, large sheet metal surfaces or the rear
spoiler.

NOTICE

Removing and attaching the cover and the
towing eye may cause damage to the vehi-
cle, for example, on the paintwork.

●

To avoid damaging the vehicle, remove and

replace the cover and the towing eye care-
fully.

NOTICE

Using a towing eye that is not suitable for the
vehicle can damage it.

●

When towing, always use the vehicle’s tow-

ing eye, which forms part of the on-board
tools, or an appropriate eye for towing.

Instructions for tow-starting and
towing

During towing, the change of direction can be
signalled on the towed vehicle even when the
hazard warning lights are on. To do so, at the
same time, the turn signal lever must be oper-
ated with ignition switched on. During this time
the hazard warning lights remain disconnected.
When the turn signal lever is returned to the
rest position, the hazard warning lights will be
automatically reactivated.

Cases where tow starting and towing the ve-
hicle are not permitted

Do not allow the vehicle to be towed in the
following situations:

●

The vehicle’s gearbox is damaged or has no

lubricant.

●

The 12-volt battery is discharged. In vehicles

with the “Keyless Access” locking and ignition
system the steering remains locked and the
parking brake cannot be deactivated and the
steering column lock cannot be released if they
are connected.

●

If a distance above 50 km needs to be travel-

led.

●

There is no guarantee that the wheels will

turn smoothly or that the steering will work after
an accident.
If the vehicle cannot be towed on its wheels for
any of the reasons mentioned above, request
assistance from specialised personnel and, if
necessary, have the vehicle transported with-
out the wheels touching the ground.

Tow start

Steps to be taken prior to tow starting

Vehicles with an automatic gearbox:

Due to

technical reasons, tow starting the vehicle is not
allowed. Attempt to start the engine using the
starting aid

›››

page 315

Vehicles with a manual gearbox:

In general, it

is not recommended to tow start the vehicle. If
the engine does not start, try the starting aid
first

›››

page 315

. Please note that, in the case

of petrol engines, the maximum permitted dis-
tance for tow starting is 50 m.

●

Secure the tow cable or tow bar using only

the attachment points provided for this pur-
pose.

●

Switch on the ignition and the hazard warning

lights.

●

Engage 2nd or 3rd gear while the vehicle is

stopped.

●

Press the clutch and hold it down.

CarManuals2.com

Miscellaneous situations

319

Towing the vehicle

●

When both vehicles are in motion, release the

clutch pedal.

●

As soon as the engine starts, depress the

clutch and disengage the gear to avoid collid-
ing with the towing vehicle.

NOTICE

When tow-starting, unburnt fuel could enter
the catalytic converter and damage it.

Towing

Previous steps

●

Secure the tow cable or tow bar using only

the attachment points provided for this purpose

›››

. Depending on the equipment, these

points may be a towing device or a towing eye.

●

Make sure the tow cable is not twisted. Other-

wise the towing eye could unscrew during tow-
ing.

●

Switch on the ignition and the hazard warning

lights of both vehicles. If necessary, take into
account other different provisions that may ex-
ist in this regard.

●

Take into account the instructions on towing

provided in the instruction manual of the other
vehicle.

Towing vehicle (front)

●

Do not actually start driving until the cable is

tight.

●

Accelerate with particular care.

●

Avoid sudden braking and manoeuvres.

Vehicles with a manual gearbox:

●

When starting to drive, use the clutch very

gently.

Towed vehicle (behind)

●

Make sure the ignition is switched on so that

the steering wheel does not lock and so that, if
necessary, you can use the turn signals and the
windscreen wiper.

●

The brake servo and power steering only

work when the engine is running. Otherwise,
you will have to depress the brake pedal con-
siderably harder and more force will be needed
to turn the steering wheel.

●

Release the electronic parking brake.

●

Make sure the tow cable is always taut.

●

Disengage the gear or place the gear selec-

tor in the

position.

WARNING

Never attach the tow rope or tow bar to axle
or running gear components. They could be
damaged, resulting in an accident and seri-
ous injury.

●

Seek specialist assistance and, if applica-

ble, have the vehicle transported on a tow
truck.

NOTICE

The vehicle can only be towed if the state of
charge of the 12-volt battery is sufficient to
disengage the electronic parking brake and
the steering column lock. If the vehicle has
no power supply or there is an electric sys-
tem fault, the engine must be jump-started
to release the electronic parking brake and
deactivate the electronic lock of the steering
column.

CarManuals2.com

320

Miscellaneous situations

Front towline anchorage

Fig. 212

Front bumper on right: remove the lid.

Fig. 213

Right side of the front bumper: towline

anchorage screwed in.

The housing of the removable towline anchor-
age is on the right side of the front bumper un-
derneath a cover

›››

Fig. 212

The towing eye should always be kept in the
vehicle.

Bear in mind the instructions for towing

›››

page 318

Fitting the towline anchorage

●

Remove the towing eye from the vehicle tool

kit in the luggage compartment

›››

page 313

●

Remove the cover by pressing down on its

base and leave it hanging from the vehicle

›››

Fig. 212

●

Screw the towing eye in the housing by

turning it to the maximum

anticlockwise

›››

Fig. 213

›››

. Use a suitable object that

can completely and securely tighten the towing
eye in its housing.

●

After towing, unscrew the towing eye

clock-

wise

with a suitable object.

●

Replace the cover and push it in until it clicks

into place.

●

Clean the towing eye if necessary and then

store it in the luggage compartment along with
the other vehicle tools.

NOTICE

The towing eye must always be completely
and firmly tightened. Otherwise, it could
jump out of the housing during towing.

Rear towline anchorage

Fig. 214

Rear bumper on right: remove the lid.

Fig. 215

Right side of the rear bumper: towline

anchorage screwed in.

The housing of the screw towing eye is on
the right side of the rear bumper behind a lid

›››

Fig. 214

CarManuals2.com

Miscellaneous situations

321

Fuses

Vehicles fitted as standard with a towing
bracket

do not

have any housing for the screw

towing eye behind the lid. In this case, the tow
hitch needs to be extracted or installed and
used for towing

›››

page 291

›››

Bear in mind the instructions for towing

›››

page 318

Assemble the rear towing eye (cars without
a factory-equipped towing bracket)

●

Remove the towing eye from the vehicle tool

kit in the luggage compartment

›››

page 313

●

Press the lower side of the lid

›››

Fig. 214

unclip it.

●

Remove the lid and let it hang from the vehi-

cle.

●

Screw the towing eye in the housing by

turning it to the maximum

anticlockwise

›››

Fig. 215

›››

. Use a suitable object that

can completely and securely tighten the towing
eye in its housing.

●

After towing, unscrew the towing eye

clock-

wise

with a suitable object.

●

Replace the cover and press until the tab

snaps into the bumper.

●

Clean the towing eye if necessary and then

store it in the luggage compartment along with
the other vehicle tools.

NOTICE

●

The towing eye must always be com-

pletely and firmly tightened. Otherwise, it
could be released while towing and tow-
starting.

●

If the vehicle is factory-equipped with a

towing bracket, it is only allowed to tow with
a tow bar if this has been specially designed
to be installed with a tow hitch. If an unsuita-
ble tow bar is used, both the tow hitch and
the vehicle may be damaged. Instead, a tow
rope should be used.

Fuses

Introduction

In general, a fuse can be assigned to various
electrical components. Likewise, an electrical
component can be protected by several fuses.
Only replace fuses when the cause of the
problem has been solved. If a newly inserted
fuse blows after a short time, you must have
the electrical system checked by a specialised
workshop as soon as possible.

WARNING

The high voltages in the electrical system
can give serious electrical shocks, causing
burns and even death!

●

Never touch the electrical wiring of the ig-

nition system.

●

Take care not to cause short circuits in the

electrical system.

WARNING

Using unsuitable fuses, repairing fuses or
bridging a current circuit without fuses can
cause a fire and serious injury.

●

Never use a fuse with a higher value. Only

replace fuses with a fuse of the same amper-
age (same colour and markings) and size.

●

Never replace a fuse by a metal strip, sta-

ple or similar.

NOTICE

●

To prevent damage to the vehicle’s electri-

cal system, before replacing a fuse always
turn off the ignition, the lights and all electri-
cal elements.

●

Protect the fuse boxes when open to pre-

vent the entry of dust or humidity as they can
damage the electrical system.

CarManuals2.com

322

Miscellaneous situations

Note

In the vehicle, there are more fuses than
those indicated in this chapter. These should
only be replaced by a specialist workshop.

Fuses inside the vehicle

Fig. 216

On the dashboard on the driver side:

lid of the fuse box.

Opening and closing the fuse box located
below the instrument panel

●

Open:

fold the cover down

›››

Fig. 216

●

Close:

push back the cover it in until it clicks

into place.

Identifying fuses below the dashboard by
colours

Colour

Current intensity in

amps

Orange

Brown

7.5

Red

Blue

Yellow

White or transparent

Green

Orange

NOTICE

●

Always carefully remove the fuse box cov-

ers and refit them correctly to avoid prob-
lems with your vehicle.

●

Protect the fuse boxes when open to avoid

the entry of dust or humidity. Dirt and humid-
ity inside fuse boxes can cause damage to
the electrical system.

Fuses in the engine compartment

Fig. 217

In the engine compartment: lid of the

fuse box.

To open the engine compartment fuse box

●

Raise the bonnet

›››

on page 326

●

Press the locking tabs to unlock the fuse box

cover

›››

Fig. 217

●

Then lift the cover out.

●

fit

the cover, place it on the fuse box. Push

the locking tabs down until they click audibly
into place.

CarManuals2.com

Miscellaneous situations

323

Fuses

Replace a blown fuse

Fig. 218

Image of a blown fuse.

Preparations

●

Switch off the ignition, lights and all electrical

equipment.

●

Open the corresponding fuse box

Recognise a blown fuse

A blown fuse can be recognised if the metal
strip is melted

›››

Fig. 218

●

Point a lamp at the fuse to see if it has blown.

To replace a fuse

●

Remove the fuse.

●

Replace the blown fuse by one with an

iden-

tical

amperage rating (same colour and mark-

ings) and

identical

size.

●

Replace the cover again or close the fuse box

lid.

Fuse placement

Fuses in the vehicle interior

No.

Consumers/Amps

Trailer

SCR, Adblue®

Automatic gearbox lever

Interior light

Sunroof

Heated seats

Left door

Trailer

Right lights

Central locking

External Ethernet Amplifier

Airbag

7.5

SCR, engine relay, 1.5

KESSY

7.5

No.

Consumers/Amps

Instrument panel

7.5

Connectivity Box

7.5

Rear camera

7.5

4x4 Haldex Control Unit

RGS+EBSS front seat belts

Right door

RGS+EBSS front seat belts

PHEV. Switching off the high
voltage system for rescue tasks.
Identified by a yellow label.

Trailer

Radio

Trailer

230V socket

Left lights

Air conditioner fan

Electric rear lid

Heated steering wheel

Alarm horn

7.5

Gateway

7.5

Automatic gearbox lever

7.5

Air conditioning and heating
control panel, rear window
heating, AA compressor

CarManuals2.com

324

Miscellaneous situations

No.

Consumers/Amps

Diagnosis, handbrake switch,
light switch, reverse light, inte-
rior lighting, lit-up door sill

7.5

Steering column

7.5

Radio display

7.5

Driving mode

USB

7.5

12V socket

Parking sensors, park distance
control unit, front camera, radar

7.5

Reverse switch, clima sensor,
electrochromic mirror

7.5

Diagnosis, headlight control
unit, headlight adjuster

7.5

Starter motor; clutch sensor

7.5

Sound amplifier

Rear window wiper

Heated rear window

In-line fuse/Amps

230 V rear power sockets

Electric driver's seat

Fuse arrangement in engine compartment

No.

Consumers/Amps

Engine control unit

7.5

Fuel pump control unit

7.5/10/

Left headlight KL 30 Signal

Right headlight KL 30 Signal

Automatic gearbox pump

KL 30 Signal brake servo

Horn

Front windscreen washer

PHEV Climate

7.5

Automatic gearbox control unit

15/30

ESP control unit

Standheizung

ESP control unit

PHEV, Automatic gearbox unit

PTC

Front electronic differential

Engine control unit

7.5

Starter motor

Engine control unit (diesel/pet-
rol)

No.

Consumers/Amps

Engine sensors

7.5/10

Engine sensors

7.5/10

Engine power supply

7.5/10/1

Lambda probe

10/15

Engine

10/20

Fuel pump control unit

15/20/3

Pressure pump 1.0

PTC

Note

●

In the vehicle, there are more fuses than

those indicated in this chapter. These should
only be changed by a specialised workshop.

●

Positions not containing a fuse do not ap-

pear in the following tables.

●

Some of the equipment listed in the tables

below pertain only to certain versions of the
model or are optional extras.

●

Please note that the above lists, while cor-

rect at the time of printing, are subject to
change.

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326

Checking and refilling levels

Checking and refilling
levels

Engine compartment

Working in the engine compartment

The engine compartment of the vehicle is a
dangerous area. You should only perform works
in the engine compartment if you have good
knowledge of the necessary operations and the
general safety measures, and if you have ade-
quate tools, means and operating fluids. Works
performed inadequately, could lead to serious
injuries

›››

. In this case, seek a specialised

workshop to perform all the works. SEAT rec-
ommends visiting a SEAT dealership for this.
Before performing any work in the engine com-
partment, always park the vehicle on level and
firm ground, taking all necessary safety pre-
cautions.

WARNING

Any accidental movement of the vehicle dur-
ing maintenance work could cause serious
injuries.

●

Never perform works underneath the vehi-

cle without having first immobilised it to pre-
vent it from moving. When working under the
vehicle with the wheels on the ground, the
vehicle must be on a level surface and the
wheels must be locked.

●

If work must be performed underneath the

vehicle, take the extra precaution of support-
ing it safely using suitable assembly support.
The jack is not suitable for this purpose and
may not withstand, which could lead to seri-
ous injuries.

●

The Start-Stop system must be switched

off manually.

WARNING

The engine compartment of any vehicle is a
dangerous area in which serious injuries can
be caused!

●

When performing any type of work, always

ensure you are extremely cautious, and bear
in mind the general safety measures. Never
put yourself at risk.

●

Never perform works in the engine com-

partment if you do not have solid knowledge
of the necessary operations. If you are un-
sure of what needs to be done, seek a speci-
alised workshop to perform the works. Works
performed inadequately, could lead to seri-
ous injuries.

●

Never open or close the bonnet if you

see steam or coolant escaping from the en-
gine compartment. Steam or hot coolant can
cause severe burns. Always wait until you
stop hearing or seeing the steam or coolant
discharging from the engine compartment.

●

Before opening the bonnet, always wait for

the engine to cool down.

●

Touching hot engine or exhaust system

components could result in skin burns.

●

Turn off the ignition and keep the vehicle

key in a safe place at a safe distance from
the vehicle to prevent the ignition from being
turned on and the combustion engine started
by mistake.

●

Always keep children away from the en-

gine compartment and never leave them un-
supervised.

●

When the motor is hot, its cooling system is

pressurised. Do not open the expansion tank
cap, hot coolant may splash out and cause
severe burns and other injuries.

–

Turn the coolant expansion tank cap

slowly and very carefully anticlockwise
while pressing it down slightly.

–

Always protect your face, hands and

arms from the hot coolant and steam with
a large thick cloth.

●

When refilling operating fluids, ensure they

do not spill onto the components of the en-
gine or onto the exhaust system. These liq-
uids could cause a fire.

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Checking and refilling levels

327

Engine compartment

WARNING

The electrical system is under high voltage
and can cause electrical shocks, burns, seri-
ous injuries and even death!

●

Never short circuit the electrical system.

The 12-volt battery could explode.

●

To reduce the risk of electric shock and se-

rious injury, never touch the electrical wires
of the ignition system while the engine is run-
ning or when starting.

WARNING

There are rotating parts in the engine com-
partment which could cause serious injury.

●

Never insert your hand in the radiator fan

or around that area. All the rotor blades can
cause serious injuries. The fan activates de-
pending on the temperature and can switch
on automatically, even if the ignition is off.

●

If any work has to be done during engine

start-up or when it is running, take into ac-
count that the rotating parts (e.g. the poly-
V belt, alternator and the radiator fan) and
the high-voltage ignition system pose a fatal
hazard. Always act with extreme care.

–

Ensure that no part of your body, or any

jewellery or tie, loose clothing, loose long
hair can become trapped in the rotating
parts. Before performing works in the en-
gine compartment, remove any jewellery
or tie you may be wearing, tie up your hair
if it is long and gather any loose clothing.

–

Do not press the accelerator pedal while

not paying attention. Always do so with ex-
treme care. The vehicle could move, even if
the electronic parking brake is activated.

●

Do not leave objects in the engine com-

partment, e.g. rags or tools.

WARNING

The operating fluids and some materials of
the engine compartment are highly flamma-
ble and could cause a fire and serious inju-
ries!

●

Never smoke in the vicinity of the engine

compartment.

●

Never perform works close to unprotected

flames or sparks.

●

When you must perform works on the on-

board 12 volt electrical system, bear in mind
the following:

–

Always disconnect the 12 volt battery.

Ensure the vehicle is unlocked when dis-
connecting the 12-volt battery, otherwise
the anti-theft alarm will trigger.

–

Never perform works in the vicinity of

heating elements, water boilers or unpro-
tected flames.

●

Always have a fire extinguisher close-by,

ensuring it is operational and had been
checked.

NOTICE

When refilling or changing the operating flu-
ids, ensure you pour the correct fluids into
their corresponding filler caps. Using the
wrong operating fluids can lead to serious
malfunctions and motor damage.

For the sake of the environment

Operating fluids that overflow from the ve-
hicle contaminate the environment. There-
fore, check underneath the vehicle on a reg-
ular basis. If there are marks left by operat-
ing fluids on the ground, consult a special-
ised workshop and request the vehicle be
checked. If any operating fluid leaks out, dis-
pose of it in the correct manner.

Preparing the vehicle for work in the
engine compartment

Before performing works in the engine com-
partment, always perform the following opera-
tions in the order indicated

›››

1. Place the vehicle on level and firm ground,

taking all necessary safety precautions.

2. Press the brake pedal and keep it pressed

until the ignition is switched off.

3. Apply the electronic parking brake.
4.

Manual transmission:

place the gear lever

in neutral.

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328

Checking and refilling levels

Automatic transmission:

press the parking

lock button

5. Switch the ignition off

›››

page 153

6. Remove the vehicle key from the vehicle

and store it outside to avoid inadvertently
starting the engine.

7. Wait for the engine to cool down suffi-

ciently.

8. Always keep other people away from the

engine compartment.

9. Immobilize the vehicle so that it cannot

move.

WARNING

For your own safety, do not ignore this impor-
tant check list, otherwise this could cause
accidents and serious injuries.

●

Always follow the indications on the check

list and always bear in mind the general
safety measures.

Opening and closing the bonnet

Fig. 219

Release lever in the driver's footwell

area.

Fig. 220

Lever under the bonnet.

Opening the bonnet

The bonnet is released from inside the vehicle.
Before opening the bonnet, make sure that the
windscreen wiper arms are in place against the
windscreen.

●

Open the door and pull the lever that is un-

derneath the instrument panel

›››

Fig. 219

●

To lift the bonnet, press towards the left on

the lever located under the bonnet, in the cen-
tre

›››

Fig. 220

. The fastening hooks are

unlocked.

●

The bonnet can be opened. Release the bon-

net stay and secure it in the fixture designed for
this in the bonnet.

Closing the bonnet

●

Slightly lift the bonnet.

●

Release the bonnet stay and replace it in its

support.

●

At a height of approximately 20 cm let it fall

so it locks.
If the bonnet does not close, do not press
downwards. Open it again and let it fall as
mentioned above.

WARNING

Make sure that the bonnet is properly closed.
If it opens when driving, it can cause an acci-
dent.

NOTICE

To avoid damage to the bonnet and to the
windscreen wiper arms, only open it when
the windscreen wipers are in place against
the windscreen.

CarManuals2.com

Checking and refilling levels

329

Cooling system

Fluids and consumables

Introduction

All fluids and consumables, such as engine
coolant or vehicle batteries, are subject to con-
tinuous development. For this reason, whenever
a fluid or consumable needs to be replaced,
please contact a specialist workshop.
SEAT dealers always promptly receive informa-
tion about any modifications.

WARNING

If unsuitable fluids and consumables are
used or used improperly, accidents, injuries,
burns and severe poisoning can occur.

●

Only store operating fluids in their original

containers, tightly closed.

●

Never store operating fluids in empty food

cans, bottles or other empty containers, as
they could be ingested by somebody.

●

Keep all fluids and consumables out of

reach of children.

●

Always read and observe the information

and warnings given on containers of operat-
ing fluids.

●

When using products that emit harmful va-

pours, always work outdoors or in a well-ven-
tilated area.

NOTICE

Use only appropriate operating fluids. Never
confuse operating fluids. This could result in
serious malfunctions and motor damage!

For the sake of the environment

Leakages of operating fluids can contami-
nate the environment. If any operating fluid
leaks, collect it in an appropriate container
and dispose of it properly and in an environ-
mentally friendly manner.

Cooling system

Introduction

Only carry out work on the motor cooling sys-
tem yourself if you are familiar with the neces-
sary operations and the generally applicable
safety measures, and if you have the appro-
priate tools, equipment and operating fluids.
Works performed inadequately could lead to
serious injuries . In this case, seek a specialised
workshop to perform all the works. SEAT rec-
ommends visiting a SEAT dealership for this.

WARNING

Engine coolant is toxic!

●

Only store coolant in its original container,

tightly closed and in a safe place.

●

Never store motor coolant in empty food

cans, bottles or other empty containers, as it
could be ingested by another person.

●

Always keep motor coolant out of reach of

children.

●

Ensure that the coolant fluid additive per-

centage is correct, taking into account the
lowest ambient temperature expected in the
location where the vehicle is to be used.

●

When the outside temperature is very low,

the coolant could freeze and the vehicle
could be immobilised. In this case, the heat-
ing would not work either and inadequately
dressed passengers could die of cold.

For the sake of the environment

Coolants and additives can contaminate the
environment. If any operating fluid leaks out,
collect it and dispose of it properly and in an
environmentally friendly manner.

Coolant specifications

The factory fitted motor cooling system is filled
with a mixture of specially treated water and at
least 40% coolant additive G12evo (TL-VW 774
L).

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330

Checking and refilling levels

Get information from a specialist workshop
about which coolant is suitable for your vehicle.
SEAT recommends visiting a SEAT dealership
for this.
To protect the engine cooling system, the ad-
ditive percentage should

always

be at least

40%. If more antifreeze protection is required
for climatic reasons, the additive proportion
can be increased. However, it should only be
increased up to a maximum of 55 %, otherwise
the antifreeze protection would be reduced and
the cooling effect would be impaired.
The G12evo (TL-VW 774 L) can be recognised
by its lilac colouring. This mixture of water
and additive not only provides antifreeze pro-
tection down to -25°C (-13°F), but also pro-
tects the light alloy parts of the cooling system
against corrosion, prevents limescale build-up
and considerably raises the boiling point of the
coolant.
When topping up the coolant, a mixture of

dis-

tilled water

and at least 40% of the appropri-

ate coolant additive should be used for opti-
mum corrosion protection

›››

page 331

WARNING

If the vehicle’s cooling system does not have
sufficient antifreeze protection, the engine
could fail and this could result in serious in-
jury.

●

Ensure that the coolant fluid additive per-

centage is correct, taking into account the
lowest ambient temperature expected in the
location where the vehicle is to be used.

●

When the outside temperature is very low,

the coolant could freeze and the vehicle
could be immobilised. In this case, the heat-
ing would not work either and inadequately
dressed passengers could die of cold.

NOTICE

Never mix the original additives for the
G12evo coolant (TL-VW 774 L) with motor
coolant fluid not authorised by SEAT.

●

If the fluid in the expansion tank does not

have a pink colour (resulting from mixing the
lilac additive with distilled water), but is, for
example, brown, the suitable coolant may
have been mixed with another unsuitable
one. The coolant must be changed as soon
as possible if this is the case! Otherwise se-
rious malfunctions or damage to the engine
and the cooling system could occur!

For the sake of the environment

Motor coolant and its additives can pollute
the environment. If any operating fluid leaks
out, collect it and dispose of it properly and
in an environmentally friendly manner.

Coolant tank

✓

Valid for: hybrid vehicles.

Fig. 221

Engine compartment: Coolant tanks

Hybrid vehicles have 2 independent coolant ex-
pansion tanks.

›››

Fig. 221

Coolant expansion tank for the combustion
engine.
Coolant expansion tank for the high-volt-
age system. Visually check the coolant
level of the

high-voltage system

Do not

open it!

It is sealed.

CarManuals2.com

Checking and refilling levels

331

Cooling system

If the coolant level in the

cooling system of the

high-voltage system

is too low:

●

Do not top up coolant!

●

Contact a specialised workshop immediately.

Check and refill the coolant

Fig. 222

In the front compartment: marking on

coolant expansion tank.

Fig. 223

Front compartment: coolant

expansion tank cap.

Previous steps

●

Park the vehicle on a firm, flat surface.

●

Wait until the engine has fully cooled

›››

●

Open the front bonnet.

●

The motor coolant expansion tank can be

recognised by the symbol on the cap

›››

Fig. 223

Check the level

When the vehicle is delivered (new vehicles),
the coolant may be above the marked area.
This is normal. It is not necessary to suck the
coolant out.

●

When the engine is cold, check the coolant

level using the side marking on the expansion
tank

›››

Fig. 222

. The coolant level should be

between the marks.

●

If the level is below the minimum level mark

(

) on the tank, top up with coolant. When the

motor is warm, the coolant level may be slightly
above the upper mark.

Topping up the fluid

When the motor coolant level is too low, the
coolant warning light comes on. In this case,
immediately seek assistance from specialist
personnel.
If the coolant level is too low and there is no
workshop nearby, note the following:

●

Always protect your face, hands and arms

from hot coolant or steam by placing a suitable
cloth over the cap of the motor coolant expan-
sion tank.

●

Carefully unscrew the cap

›››

●

Only top up with

fresh

coolant according to

SEAT specifications

›››

page 329

●

Only top up with coolant if there is still some

coolant left in the expansion tank; otherwise the
motor could be damaged! If you do not see any
coolant in the expansion tank,

do not continue

driving

and seek specialist assistance.

●

If there is still some coolant left in the expan-

sion tank, top up with coolant up to the tank’s
upper mark and check the level the next day.
If the level drops

again

, go to a workshop and

request a check of the cooling system.

●

The coolant level must be between the marks

on the expansion tank

›››

Fig. 222

Never ex-

ceed the top edge of the marked area

›››

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332

Checking and refilling levels

●

Screw the cap on tightly.

●

If engine coolant with the recommended

specifications is not available in an emergency,
do not use any other coolant additive! In this
case, top up with

distilled water

›››

only.

Next, ensure that the recommended additive is
topped up as soon as possible in the correct
proportion

›››

page 329

WARNING

Steam and hot motor coolant can cause se-
vere burns.

●

Never open the front bonnet if you see or

hear steam or coolant escaping from the
front compartment. Always wait until you can
no longer see or hear steam or coolant es-
caping. Touching hot parts can result in skin
burns.

●

Before opening the front bonnet, please

note the following:

–

Apply the electronic parking brake.

–

Always keep children away from the front

compartment and never leave them unat-
tended.

●

When the motor is hot, its cooling system is

pressurised. Do not open the expansion tank
cap, hot coolant may splash out and cause
severe burns and other injuries.

–

Turn the cap slowly and very care-

fully anticlockwise while pressing it down
slightly.

–

Always protect your face, hands and

arms from the hot coolant and steam with
a large thick cloth.

NOTICE

Only use distilled water! Other types of wa-
ter contain chemical substances that could
cause significant corrosion damage. If you
have added non-distilled water, have all of
the motor cooling system fluid changed im-
mediately by a specialist workshop.

●

When topping up the, do not fill over the

upper edge of the marked area

›››

Fig. 222

Otherwise, when the temperature rises the
excess fluid will be expelled from the motor
cooling system and could cause damage.

●

If the system leaks a lot of coolant, only

refill once the motor has

cooled down com-

pletely

. If there is a significant loss of cool-

ant, there may be leaks in the cooling sys-
tem. Immediately go to a specialist workshop
to have the system checked. This could result
in motor damage.

●

Do not add coolant if the expansion tank

is completely empty! Air may have got into
the cooling system. Do not continue driving
and seek assistance from specialist person-
nel. This could result in motor damage.

●

When changing the operating fluids, make

sure that you pour the correct fluids into the
correct filler necks. Using the wrong operat-
ing fluids can lead to serious malfunctions
and motor damage.

Brake fluid

Check and refill the brake fluid

Fig. 224

Engine compartment: brake fluid

reservoir cap.

Checking the brake fluid level

The brake fluid level must be between the
and

markings.

CarManuals2.com

Seat Leon (2023 year). Manual in english - page 10