Seat Leon (2022 year). Manual in english

Practical tips

WARNING

Fuel is highly flammable and can cause se-
rious 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 pres-

surized to prevent petrol vapours from es-
caping 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 canis-
ter in the vehicle.

●

For safety reasons we do not recommend

carrying a spare fuel canister in the vehi-
cle. In an accident the canister could be
damaged 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 canis-
ter 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 possi-
ble into the spare fuel canister.

–

If the spare fuel canister is made of
metal, the filling nozzle must be in con-

tact 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
explosive. Risk of fatal accident!

CAUTION

●

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 special-
ised personnel.

Note

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

. It is only possible to re-

fuel 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. Be-
fore 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 can-

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

Depending on country

318

Checking and refilling levels

Refuelling natural gas

Fig. 224

Tank cap open: gas filler mouth

filler mouth retainer

Before

refuelling, the engine and the ignition,

mobile telephone and heating must be
switched off separately

›››

Read the instructions on how to use the natu-
ral gas pump carefully.

Refuelling

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

›››

Fig. 224

●

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

compressor 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
natural gas pump’s overheating protection
disconnects it automatically.

Closing the fuel tank cap

●

Check that the mouth retainer

of the gas

filler is not trapped with the filler. 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
flammable substance. Incorrect handling
of the natural gas can cause accidents se-
rious burns and other injuries.

●

Before refuelling with natural gas, en-

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

●

Read and take note

›››

in Natural gas

on page 322

WARNING

The vehicle is not suitable for liquefied nat-
ural gas (LNG) or liquefied petrol gas (LPG),
so LNG or LPG should not be used under
any circumstances. Liquid gas can cause

an explosion 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 damaged, natural gas tanks are
full of fuel and can explode, causing seri-
ous 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
inspected.

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.

●

The vehicle natural gas system is pre-

pared both for refuelling with a small com-
pressor (slow refuel) and a large compres-
sor (fast refuel) at natural gas service sta-
tions.

319

Practical tips

Fuel types

Identification of fuels

Fig. 225

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

tha-

nol). The number indicates the percent-
age of ethanol in the petrol. “E5” means,
for example, 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

as.

Type of petrol

Valid for: vehicles with petrol engines

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

petrol

. 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 oc-
tane petrol (91 AKI). If not available, normal 91
octane 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 is not available,

if necessary

, use nor-

mal 91 octane petrol (87 AKI). In this case only
use moderate engine speeds and a light
throttle. Refuel with super as soon as possi-
ble.

Unleaded super plus 98 octane petrol or
super 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 is not available,

if necessary

, use nor-

mal 91 octane petrol (87 AKI). In this case only
use moderate engine speeds and a light

Depending on country

Follow the regulations of the country you are

driving in.

320

Checking and refilling levels

throttle. Refuel with super as soon as possi-
ble.

CAUTION

●

Fuels high percentage of ethanol, e.g.

E30 - E100 button must not be used. The
fuel system would be damaged. Exception:
vehicles with Totalflex engine

›››

page 321,

Ethanol fuel

●

A single refuelling with leaded fuel or

other metal additives entails a permanent
deterioration of the effectiveness of the
catalytic converter.

●

Only use fuel additives that have been

approved by SEAT. The products that con-
tain substances to increase the octane rat-
ing or decrease knocking may contain met-
al additives 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 sul-
phur 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
unleaded petrol (95 octane / 91 AKI) accord-
ing to ANP No. 57 and with fuels with any high
percentage of ethanol. The vehicle is refuel-
led in the same way as petrol refuelling.

Also consider that

›››

page 320, Type of pet-

rol

Note

SEAT recommends filling the tank exclu-
sively with petrol every 10,000 km to de-
crease impurities 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
equipped with a

fuel filter with a water sep-

arator

, the instrument panel may display the

following warning:



Water in the fuel

filter.

If this is the case, take the vehicle to

a specialised workshop so that they can
drain the fuel filter.

CAUTION

●

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.

This motor is only available in some markets.

Depending upon country.

321

Practical tips

Risk of damaging the fuel system and the
engine! Obtain technical assistance.

Natural gas

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

Use of compressed natural gas (CNG)

Vehicles with a natural gas engine must only
be working with

CNG

(

ompressed

atural

CNG

), or with a mixture of

biomethane

if it complies with Regulation EN 16723-2.

Fuels such as liquefied natural gas (LNG), liq-
uefied petroleum gas (LPG) or hithane (mix-
ture 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
corroded 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

. Natural gas tanks must be replaced

at a specialised workshop.

WARNING

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

●

Stop the vehicle immediately.

●

Switch the ignition off.

●

Open the doors to appropriately venti-

late 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 serv-

ices.

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 speci-
alised workshops.

AdBlue®

Information about AdBlue®

AdBlue® consumption depends on your per-
sonal driving style, the temperature of the
system and the outdoor temperature when
the vehicle is used.

AdBlue® freezes at temperatures of -11 °C
(+13°F). The system has heating elements
that guarantee its operation even at low tem-
peratures.

The AdBlue® tank has a capacity of approx.
11 litres.

322

Checking and refilling levels

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 indica-

tion that in XXX km it will no longer be possible
to restart the engine will appear on the instru-
ment panel display.

If the yellow indicator lamp is ignored, when

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
(Diesel Exhaust Fluid).

CAUTION

Overfilling with AdBlue® can cause dam-
age to the tank system.

Control and warning lamps



It lights up red

The engine cannot be restarted!

The AdBlue level

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

›››

page 323



and



They light up red

The engine cannot be restarted!

Fault in the

AdBlue system.
Contact a specialised workshop. Have the system
checked there.



It lights up yellow

The AdBlue reserve is low.

Refill AdBlue within the next kilometres (or miles) that

are indicated

›››

page 323

. SEAT recommends con-

tacting a specialised workshop.



and



They light up yellow

There is a fault in the AdBlue system or unsuitable
AdBlue fluid has been used.

Contact a specialised workshop. Have the system

checked there.

Several warning and control lamps should
light up for a few seconds when the ignition is
switched on, signalling that the function is be-
ing verified. They will switch off after a few
seconds.

WARNING

Observe the safety warnings

›››

in Con-

trol and warning lamps on page 88

Fill AdBlue®

Fig. 226

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 (ap-
prox. 5 litres)

. Only after adding this amount

will the system detect that AdBlue® has been
added and you will be able to start the en-
gine again. The maximum amount that can
be refilled is 11 litres.

Fill with a refill bottle
Only use AdBlue® that complies with the
ISO 22241-1 standard. Only use original
containers.

323

Practical tips

●

Open the tank cover

›››

Fig. 226

●

Unscrew the tank cap by turning it in an an-

ti-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 di-

rection and gently pull it upwards

›››

●

The AdBlue® tank is full when no more liq-

uid 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.

Operations before driving

●

After refilling the tank,

only

switch on the ig-

nition.

●

Leave the ignition on for at least 30 sec-

onds for the system to detect the fluid load.

●

Make sure you wait for at least 30 seconds

before starting the engine!

Refilling the dispenser with AdBlue

Valid for vehicles with selective catalytic re-
duction.

●

Open the tank cap.

●

Turn the SCR tank cap anti-clockwise

›››

Fig. 226

●

Add AdBlue until the nozzle stops for the

first time.

●

Close the SCR tube by turning it clockwise

until you hear a click.

WARNING

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

CAUTION

●

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.

●

Only use AdBlue® that complies with the

ISO 22241-1 standard. Only use original
containers.

●

Never mix AdBlue® with water, fuel or ad-

ditives. 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 environ-
ment-friendly manner.

Note

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

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!

●

Do not apply wax underneath the vehicle

around the area of the exhaust system: Fire
hazard!

324

Checking and refilling levels

Control lamps



It lights up

Fault in the emission control system.
Reduce speed and drive carefully to the nearest spe-

cialised workshop to have the engine checked.



Flashes

Combustion failures that can damage the catalytic

converter.

Reduce speed and drive carefully to the nearest spe-

cialised workshop to have the engine checked.



It lights up

Particulate filter blocked

›››

page 325



It lights up

Fault in the petrol engine management.
Have the engine checked as soon as possible by a
specialised workshop.

When the ignition is switched on, the



(Electronic

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



It lights up

Diesel engine preheating system.
The engine can be started straight away when the
lamp switches off.



Flashes

Fault in the diesel engine management.

Have the engine checked as soon as possible by a
specialised workshop.

Note

While the control lamps









are

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

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 332,

Topping up the engine oil

●

Never tow the vehicle to start it, use jump

leads if necessary

›››

page 53

If you should notice misfiring, uneven running
or loss of power when the car is moving, have
the vehicle inspected by a specialised work-
shop. In general, the emissions warning lamp



will light up when any of these symptoms

occur. If this happens, any unburnt fuel can
enter the exhaust system and escape into the

atmosphere. The catalytic converter can also
be damaged by overheating.

CAUTION

Never run the fuel tank completely dry be-
cause an irregular fuel supply can cause
ignition faults. This allows unburnt fuel to
enter the exhaust system, which could
cause overheating and damage the cata-
lytic 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 indica-
tion is displayed to the driver:



Particu-

late filter: cleaned while the vehi-
cle is moving. See Manual.

The

325

Practical tips

particulate filter needs cleaning (regenera-
tion).

Regeneration of the petrol particulate fil-
ter (only for 2.0l TSI engines)

Requirements for the regeneration journey:

the engine is at operating temperature.

●

Drive at a speed of at least 80 km/h

›››

●

Completely remove your foot from the ac-

celerator 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 im-

mediately to a specialised workshop to repair
the fault.

Regeneration of the petrol (except the TSI
2.0l engine) and diesel particulate filter

Requirements for the regeneration journey:

the engine is at operating temperature.

●

Drive at a speed of between 50-120 km/h

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

›››

●

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 spe-
cialised workshop repair the fault

WARNING

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

CAUTION

●

When the exhaust system detects that

the particulate filter is close to saturation,
the self-cleaning function of this system
recommends optimal driving for this func-
tion.

●

Due to the high temperatures caused by

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

●

Noise, smells and high idle speeds can

occur 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.

Engine compartment

Working in the engine compart-
ment

Always be aware of the danger of injury and
scalding as well as the risk of accident or fire
when working in the engine compartment
(e.g. when checking and refilling fluids).

Always observe the warnings listed below
and follow all general safety precautions.

The vehicle's engine compartment is a po-
tentially hazardous area

›››

WARNING

When work is done in the engine compart-
ment, injuries, burns, accidents and even
fires can occur.

●

Turn off the engine, disconnect the igni-

tion e and apply the electronic parking
brake. If the vehicle has a manual gearbox,
place the lever in neutral; if it has an auto-
matic gearbox, activate the parking lock
(button P). Wait for the engine to cool
down.

●

Never open the bonnet if you see steam

or drips of coolant being released from the

326

Checking and refilling levels

engine compartment. Wait until no steam
or coolant can be seen before opening the
bonnet.

●

Keep children away from the engine

compartment.

●

Never spill liquids used for vehicle opera-

tion on the engine compartment, as these
may catch fire (e.g. the antifreeze in cool-
ant).

●

Avoid causing short-circuits in the elec-

trical system, particularly at the points
where the jump leads are attached

›››

page 53

. The battery could explode.

●

If working inside the engine compart-

ment, remember that, even when the igni-
tion is switched off, the radiator fan may
start up automatically, and therefore there
is a risk of injury.

●

Never cover the engine with additional in-

sulating materials such as a blanket. Risk of
fire!

●

Do not unscrew the cap on the coolant

expansion tank when the engine is hot. The
cooling system is under pressure.

●

Protect face, hands and arms by cover-

ing the cap with a large, thick rag to protect
against escaping coolant and steam.

●

Always make sure you have not left any

objects, such as cleaning cloths or tools, in
the engine compartment.

●

If you have to work underneath the vehi-

cle, you must use suitable stands addition-
ally to support the vehicle, there is a risk of

accident!. A hydraulic jack is insufficient for
securing the vehicle and there is a risk of
injury.

●

If any work has to be performed when the

engine is started or with the engine running,
there is an additional, potentially fatal,
safety risk from the rotating parts, such as
the drive belts, alternator, radiator fan, etc.,
and from the high-voltage ignition system.
You should also observe the following:

–

Never touch the electrical wiring of the
ignition system.

–

Ensure that jewellery, loose clothing
and long hair do not get trapped in ro-
tating engine parts. Danger of death.
Before starting any work remove jewel-
lery, tie back and cover hair, and wear
tight-fitting clothes.

–

Never accelerate with a gear engaged
without taking the necessary precau-
tions. The vehicle could move, even if
the handbrake is applied. Danger of
death.

●

Observe the following additional warn-

ings if work on the fuel system or the elec-
trical system is necessary:

–

Always disconnect the 12-volt vehicle
battery from the on-board network.

–

Do not smoke.

–

Never work near naked flames.

–

Always keep an approved fire extin-
guisher immediately available.

For the sake of the environment

●

Inspect the ground underneath your vehi-

cle regularly so that any leaks are detec-
ted at an early stage. If you find spots of oil
or other fluids in the area where it was
parked, have your vehicle inspected at the
workshop.

●

Service fluids leaks are harmful to the en-

vironment. For this reason you should make
regular checks on the ground underneath
your vehicle. If you find spots of oil or other
fluids, have your vehicle inspected in a
specialised workshop.

Note

In right-hand drive vehicles some brake flu-
id reservoirs are on the other side of the en-
gine compartment

›››

Fig. 229

327

Practical tips

Opening and closing the bonnet

Fig. 227

Release lever in the driver's footwell

area.

Fig. 228

Lever under the bonnet.

Opening the bonnet

The bonnet is released from inside the vehi-
cle.

Before opening the bonnet, make sure that
the windscreen wiper arms are in place
against the windscreen.

●

Open the door and pull the lever under the

dashboard

›››

Fig. 227

●

To lift the bonnet, press towards the left on

the lever located under the bonnet, in the
centre

›››

Fig. 228

. The arrester hooks are

released.

●

The bonnet can be opened. Release the

bonnet stay and secure it in the fixture de-
signed 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 accident.

CAUTION

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.

328

Checking and refilling levels

Checking levels

Fig. 229

Diagram for the location of the various el-

ements.

From time to time, the levels of the different
fluids in the vehicle must be checked. Never
fill with incorrect fluids, otherwise serious
damage to the engine may be caused.

Coolant expansion tank

›››

page 333

Engine oil level dipstick

›››

page 331

Engine oil filler cap

›››

page 332

Brake fluid reservoir

›››

page 335

Battery

›››

page 337

Windscreen washer reservoir

›››

page 336

Note

The layout of parts may vary depending on
the engine.

In plug-in hybrid vehicles (PHEV) the battery is

in the luggage compartment

›››

page 339

329

Practical tips

Engine oil

General notes

Fig. 230

In the engine compartment: engine

oil label

Fig. 231

In the engine compartment: area

where the engine oil label is located

Key to the

›››

Fig. 230

Information about the engine oil stand-
ard.
Information about engine oil viscosity.

The engine comes with a special, multi-grade
oil that can be used all year round.

Because the use of high-quality oil is essen-
tial for the correct operation of the engine
and its long useful life, when topping up or
changing oil, use only those oils that comply
with VW standards.

For vehicles with an engine oil label

If the engine oil has to be topped up, use one
of the oils shown on the label

›››

Fig. 230

. The

label with the prescribed standard is located
at the front of the engine compartment

›››

Fig. 231

. If you use the recommended

engine oil, you can top up the oil as often as
necessary.

For vehicles without an engine oil label

Contact a specialised workshop or SEAT offi-
cial service for information about the corre-
sponding standard.

If the engine oil level is too low

If the recommended engine oil is not availa-
ble, in the event of an

emergency

you can

change the oil

once

with a maximum of 0.5 L

of the next oil until the next oil change:

Petrol and CNG engines:

VW 504 00,

ACEA C3 or API SN standard.

Diesel engines:

VW 507 00, ACEA C3 or

API CJ-4, viscosity 0W-30.

–

SEAT recommends changing the oil at a spe-
cialised workshop. SEAT recommends an Of-
ficial SEAT Service.

SEAT recommends the use of engine oils ap-
proved according to the appropriate VW
standard. Use of engine oils that do not meet
these quality requirements can cause engine
damage.

SEAT recommends the use of Original SEAT
Spare Part engine oils.

Engine oil additives

No type of additive should be mixed with the
engine oil. The deterioration caused by these
additives is not covered by the warranty.

CAUTION

Take the following into account if you have
refilled with an engine oil different to those
specified in the aforementioned standards,
or by your SEAT technical service centre:

●

There is no way of completely avoiding

the danger of causing damage to the en-
gine and particulate filter.

●

You can continue driving with the vehicle

if the refill was no more than 0.5 l of engine
oil. Go to a specialised workshop as soon
as possible and request an oil change. Oth-
erwise, there is a danger of engine dam-
age.

●

If you have topped up more than 0.5 l of

engine oil, drive with the engine at low load

330

Checking and refilling levels

levels and within the medium RPM range as
a maximum. Do not drive at more than 80
km/h and do not travel more than 300 km
(approximately). Go to a specialised work-
shop as soon as possible and request an oil
change. Otherwise, there is a danger of en-
gine damage.

●

You are responsible for the risk of possi-

ble damage to the vehicle (engine, exhaust
system). If in doubt, do not start the engine
and request assistance from the technical
service centre.

●

Do not start the engine if you have top-

ped up with a fluid other than engine oil.
Request assistance from the technical
service centre. Danger of engine damage!

Note

Before a long trip, we recommend finding
an engine oil that conforms to the corre-
sponding VW specifications and recom-
mend keeping it in the vehicle. This way, the
correct engine oil will always be available
for a top-up if needed.

Warning lamp



It lights up red



Do not carry on driving!

Engine oil pressure too low.

Switch off the engine. Check the engine oil level.

If this warning lamp



starts to flash, and is accom-

panied by three

audible warnings

, switch off the en-

gine and check the oil level. If necessary, add more
oil

›››

page 332

If the warning lamp



flashes although the oil level

is correct,

stop

driving. Do not even run the engine at

idle speed! Obtain technical assistance.



It lights up yellow

Check the engine oil level as soon as possible.
Replace oil as soon as you have the opportunity to
do so

›››

page 332



It flashes yellow

Fault in the oil level sensor.
Have the check done by a specialised workshop. Un-
til then it is advisable to check the oil level every time

you refuel.

WARNING

Observe the safety warnings

›››

in Con-

trol and warning lamps on page 88

Checking the engine oil level

Fig. 232

Engine oil dipstick.

The engine oil dipstick indicates the level of
the oil.

Checking oil level

–

Park the vehicle in a horizontal position.

–

Briefly run the engine at idle speed until the
operating temperature is reached and then
stop.

–

Wait for about two minutes.

–

Pull out the dipstick. Wipe the dipstick with
a clean cloth and insert it again, pushing it
in as far as it will go.

–

Then pull it out once more and check the oil
level

›››

Fig. 232

. Top up with engine oil if

necessary.

The oil must leave a mark between zones

and

. It can never go above zone

331

Practical tips

●

Zone

: do not add oil.

●

Zone

: you can add oil but keep the level

in that zone.

●

Zone

: add oil until zone

Depending on how you drive and the condi-
tions in which the vehicle is used, oil con-
sumption can be up to 0.5 l/1000 km. Oil
consumption is likely to be higher for the first
5,000 km. For this reason the engine oil level
must be checked at regular intervals, prefera-
bly when filling the tank and before a journey.

WARNING

Any work carried out in the engine com-
partment or on the engine must be carried
out cautiously.

●

When working in the engine compart-

ment, always observe the safety warnings

›››

page 326

CAUTION

If the oil level is above area

, do not start

the engine. This could result in damage to
the engine and catalytic converter. Con-
tact a Technical Service.

Topping up the engine oil

Fig. 233

In the engine compartment: Engine

oil filler cap.

Before opening the bonnet, read and observe
the warnings

›››

in Working in the engine

compartment on page 326

Topping up engine oil

●

Unscrew cap from engine oil filler opening

›››

Fig. 233

●

Carefully add oil in small quantities (no

more than 0.5 l).

●

To avoid adding too much oil, whenever you

add a certain amount, wait about 2 minutes
and recheck the oil level

›››

page 331

●

If necessary, add some more oil.

●

When the oil level reaches at least zone

›››

Fig. 232

, unscrew the engine oil filler

cap carefully

›››

The position of the oil filler opening is shown
in the corresponding engine compartment il-
lustration

›››

page 329

Engine oil specification

›››

page 330

WARNING

Oil is highly inflammable! Ensure that no oil
comes into contact with hot engine compo-
nents when topping up.

CAUTION

If the oil level is above area

›››

Fig. 232

do not start the engine. This could result in
damage to the engine and catalytic con-
verter. Contact a specialised workshop.

For the sake of the environment

The oil level must never be above zone

›››

Fig. 232

. Otherwise oil can be drawn

in through the crankcase breather and leak
into the atmosphere via the exhaust sys-
tem.

Note

332

Checking and refilling levels

Engine oil change

We recommend that you have the engine oil
changed by a Technical Service.

WARNING

Only change the engine oil yourself if you
have the specialist knowledge required!

●

Before opening the bonnet, read and ob-

serve the warnings

›››

page 326

●

Wait for the engine to cool down. Hot oil

may cause burn injuries.

●

Wear eye protection to avoid injuries,

such as acid burns, caused by splashes of
oil.

●

When removing the oil drain plug with

your fingers, keep your arm horizontal to
help prevent oil from running down your
arm.

●

Wash your skin thoroughly if it comes into

contact with engine oil.

●

Engine oil is poisonous! Used oil must be

stored in a safe place out of the reach of
children.

CAUTION

No additives should be used with engine oil.
This could result in engine damage. Any
damage caused by the use of such addi-
tives would not be covered by the factory
warranty.

For the sake of the environment

●

We recommend that you change the en-

gine oil and the filter at a technical service
centre.

●

Never pour oil down drains or into the

ground.

●

Use a suitable container when draining

the used oil. It must be large enough to hold
all the engine oil.

Cooling system

Coolant specifications

The engine cooling system is supplied from
the factory with a specially treated mixture of
water and at least 40 % of the additive

G12evo

(TL-VW 774 J), purple. This mixture

gives the necessary frost protection down to
-25°C (-13°F) and protects the light alloy
parts of the engine cooling system against
corrosion. It also prevents scaling and con-
siderably raises the boiling point of the cool-
ant.

To protect the cooling system, the percent-
age of additive must always be at least 40 %,
even in warm climates where anti-freeze pro-
tection is not required.

If for weather reasons further protection is
necessary, the proportion of additive may be

increased, but only up to 60 %; otherwise an-
tifreeze protection will diminish and this will
worsen cooling.

When the coolant is topped up, use a mixture
of

distilled water

and at least 40 % of the

additive

G12evo

for optimal protection

against corrosion. Mixing

G12evo

with G13

(TL-VW 774 J), G12 plus-plus (TL-VW 774 G),
G12 plus (TL-VW 774 F), G12 (red) or G11
(green blue) engine coolants decreases pro-
tection again corrosion and should be avoi-
ded.

WARNING

If there is not enough anti-freeze in the
coolant system, the engine may fail lead-
ing to serious damage.

●

Ensure that the percentage of additive is

correct for the lowest expected ambient
temperature in the zone in which the vehi-
cle is to be used.

●

When the outside temperature is very

low, the coolant could freeze and the vehi-
cle would be immobilised.

CAUTION

The original additives should never be
mixed with coolants which are not ap-
proved by SEAT.

●

If the fluid in the expansion tank is not

purple but is, for example, brown, this indi-
cates that the G12evo additive has been

333

Seat Leon (2022 year). Manual in english - page 20