Get Practical tips -> AdBlue? Guide for Seat Leon 4 Door Fourth Generation (2021-2026)

Practical tips

comprehensive draining before applying a

different quality gas.

●

Risk of damaging the fuel system and the

engine! Obtain technical assistance.

If necessary, warn the emergency serv-

ices.

Updated information relating to natural gas

quality is shown on the instrument cluster dis-

play.

WARNING

Natural gas

Damaged, corroded or rusted tanks can re-

sult in serious injury or even death.

Regular checks of the natural gas system

Natural gas can be compressed or in liquid

form, addition to others.

●

Have the natural gas deposits checked at

least every 4 years (visual check).

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.

●

Natural gas tanks have a limited service

Use of compressed natural gas (CNG)

life. Have the natural gas tanks replaced

when required. You can obtain further infor-

mation about this at SEAT dealers or speci-

alised workshops.

Vehicles with a natural gas engine must only

be working with CNG (Compressed Natural

Gas 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.

WARNING

AdBlue®

Failure to act when you can smell gas in the

vehicle or when refuelling can cause seri-

ous injuries.

Information about AdBlue®

Natural gas quality and consumption

AdBlue® consumption depends on your per-

sonal driving style, the temperature of the

system and the outdoor temperature when

the vehicle is used.

●

Stop the vehicle immediately.

Switch the ignition off.

Natural gas is divided into the groups H and L

depending on its quality.

Open the doors to appropriately venti-

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.

late the vehicle.

AdBlue® freezes at temperatures of -11 °C

(+13°F). The system has heating elements

that guarantee its operation even at low tem-

peratures.

●

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-

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

The AdBlue® tank has a capacity of approx.

11 litres.

tinue driving!

●

Seek specialist assistance. Have the fault

repaired.

322

Checking and refilling levels

They light up red

When the range is less than 2400 km the

instrument cluster screen displays a message

requesting an AdBlue® refill.

Fill AdBlue®

and





The engine cannot be restarted! Fault in the

AdBlue system.

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.

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

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 .

are indicated page 323. SEAT recommends con-

tacting a specialised workshop.

›››

Fig. 224 AdBlue tank cap.

They light up yellow

and





Operations prior to refilling

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).

There is a fault in the AdBlue system or unsuitable

AdBlue fluid has been used.

Contact a specialised workshop. Have the system

checked there.

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.

CAUTION

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.

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.

Overfilling with AdBlue® can cause dam-

age to the tank system.

Control and warning lamps

WARNING

Observe the safety warnings

in Con-

›››

It lights up red



trol and warning lamps on page 88.

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

Fill with a refill bottle

Only use AdBlue® that complies with the

ISO 22241-1 standard. Only use original

containers.

page 323.

›››

323

Practical tips

●

Open the tank cover Fig. 224.

Refilling the dispenser with AdBlue

›››

●

Never pour AdBlue® into the fuel tank!

This could result in engine damage.

Unscrew the tank cap by turning it in an an-

Valid for vehicles with selective catalytic re-

duction.

ti-clockwise direction.

●

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.

●

Please observe the manufacturer's instruc-

tions, indicated on the refill bottle.

●

Open the tank cap.

●

Turn the SCR tank cap anti-clockwise

Fig. 224.

●

Check the expiry date.

›››

●

Remove the cap of the refill bottle.

Insert the neck of the bottle in the tank filler

Add AdBlue until the nozzle stops for the

For the sake of the environment

first time.

Dispose of the refill bottle in an environ-

ment-friendly manner.

neck vertically and screw the bottle on by

hand, by turning it in a clockwise direction.

●

Close the SCR tube by turning it clockwise

until you hear a click.

●

Press the refill bottle in the direction of the

filler neck and hold it in this position.

Note

WARNING

Suitable AdBlue® refill bottles can be pur-

chased from SEAT dealerships.

●

Wait until the contents of the refill bottle

AdBlue® should only be stored in its origi-

nal container, which should be tightly

closed and kept in a safe place.

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

›››

CAUTION

Engine management and

emissions control system

●

The AdBlue® tank is full when no more liq-

uid comes out of the bottle.

●

When refilling, the nozzle grip should be

aligned downward. Otherwise the nozzle

will not connect automatically.

●

Screw on the tank cap in a clockwise direc-

tion until it is tightly closed.

Introduction

●

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.

●

Close the fuel tank flap.

WARNING

●

Due to the high temperatures reached by

Operations before driving

the exhaust gas scrubbing system, you

should not park your vehicle near a surface

that can catch fire easily. Fire hazard!

●

Only use AdBlue® that complies with the

●

After refilling the tank, only switch on the ig-

ISO 22241-1 standard. Only use original

containers.

nition.

●

Do not apply wax underneath the vehicle

Leave the ignition on for at least 30 sec-

●

Never mix AdBlue® with water, fuel or ad-

around the area of the exhaust system: Fire

hazard!

onds for the system to detect the fluid load.

ditives. Any type of damage caused by

such a mixture will not be covered by the

warranty.

●

Make sure you wait for at least 30 seconds

before starting the engine!

324

Practical tips -> AdBlue? for Your Seat Leon 4 Door Fourth Generation (2021-2026)

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