Get Checking and topping up fluids -> Emission control system Guide for Audi Rs Q8 SUV First Generation (2020-2026)

Checking and topping up fluids

After refilling AdBlue

Applies to: vehicles with selective catalytic reduction

– Do not apply any underseal agents in the

area around the exhaust system – risk of

fire!

Closing the filler neck

►

Screw the AdBlue cap clockwise onto the filler

Catalytic converter

Applies to: vehicles with petrol engine

neck until the AdBlue cap clicks audibly ð

Before refilling AdBlue on page 316, ð

Before refilling AdBlue on page 316.

Please refer to the safety information

►

Press the left side of the flap to close it (you

should hear it click into place).

ðpage 318, General information.

The vehicle must only be used with unleaded pet-

rol, otherwise the catalytic converter will be ir-

reparably damaged.

After refilling

The vehicle must be driven so that the system

can detect the AdBlue which has been added.

This process can take several minutes.

Never allow the fuel tank to run completely dry,

as the irregular supply of fuel can cause misfir-

ing. This allows unburnt fuel to enter the exhaust

system, which can cause overheating and dam-

age to the catalytic converter.

►

If the AdBlue tank had run dry and a range of

0 km was shown on the display, switch on the

ignition for approx. 30 seconds before starting

the engine.

Particulate filter

Applies to: vehicles with particulate filter

Note

Please refer to the safety information

ðpage 318, General information.

AdBlue can freeze at very low temperatures.

Restrictions may therefore be encountered

when refilling. In this case, the system may

not detect AdBlue when you refill and will

continue to indicate a low AdBlue level. The

message will disappear as soon as the tank

has thawed.

The particulate filter can filter out almost all soot

particles contained in the exhaust gas. In normal

driving conditions the filter is self-cleaning.

Should the self-cleaning function of the filter not

be able to operate, e.g. if the vehicle is continu-

ously used only for short trips, the filter will be-

come obstructed with soot and a driver message

will appear. The particulate filter requires clean-

ing (regeneration).

Emission control system

General information

Driver messages:

WARNING



The exhaust system is very hot when the vehi-

cle is being driven and after the engine has

been switched off.

Particulate filter: can be cleaned by driving

vehicle. You can continue driving. See owner's

manual

– Never touch the tailpipes when they are hot

– risk of burns!



Particulate filter: can be cleaned by driving

vehicle. You can continue driving. See owner's

manual

– Because of the high temperatures which can

occur in the exhaust system, do not park the

vehicle where the exhaust can come into

contact with flammable materials under the

car (e.g. on grass or at the forest edge) – risk

of fire!

Different regeneration procedures are required,

depending on the type of power unit (petrol/

diesel/plug-in hybrid).



318

Checking and topping up fluids

Regenerating the particulate filter by driving

and coasting

WARNING

Applies to: vehicles with petrol engine without plug-in hybrid

drive

When regenerating the particulate filter, it is

essential that you adjust your speed to suit

the weather, road, terrain and traffic condi-

tions. The recommendation must never lead

to the driver disregarding local traffic regula-

tions.

Before starting the regeneration trip, check

whether regenerating the particulate filter by

driving and coasting is the correct method for

your vehicle (based on the engine) ð

The engine must be warmed up prior to the re-

generation trip.

CAUTION

Before starting the regeneration trip, check

which method (driving at a constant speed or

driving and coasting) is required for your vehi-

cle (based on the engine). If you do not use

the correct method, the regeneration trip may

have no effect and the particulate filter may

be damaged.

►

Drive at a speed of at least 80 km/h ð

►

Then take your foot off the accelerator com-

pletely for a few seconds and let the vehicle

coast in gear.

►

Repeat this procedure (accelerate to at least

80 km/h and coast again) until the indicator

lamp goes out.

Note

This procedure causes the particulate filter to re-

generate itself and may take some time.

– As a result of the high temperatures which

occur during the regeneration of the partic-

ulate filter, the radiator fan may continue to

run after the engine is switched off, even if

the engine has not yet reached operating

temperature.

If the indicator lamp does not disappear after a

while, drive to a qualified workshop and have the

fault rectified.

Regenerating the particulate filter by driving

at a constant speed

– Noises, odours and increased engine speeds

when idling may be noticed during regener-

ation. The availability of electric driving is

limited on vehicles with plug-in hybrid drive.

– Applies to vehicles with diesel engine: If the

indicator lamp requesting you to refuel the

vehicle  also appears in the instrument

cluster during the regeneration trip, the

particulate filter regeneration process may

be interrupted. Drive to a filling station and

then resume the regeneration trip after re-

fuelling the vehicle.

Applies to: vehicles with diesel engine or plug-in hybrid drive

Before starting the regeneration trip, check

whether regenerating the particulate filter by

driving at a constant speed is the correct meth-

od for your vehicle (based on the engine) ð

The engine must be warmed up prior to the re-

generation trip.

►

Drive at a speed of between 50 km/h and

120 km/h ð

. As a result of the increase in

temperature, the soot in the filter will be

burned off.

– To maximise the service life of the particu-

late filter, always use suitable engine oil and

the correct fuel. You should also avoid driv-

ing the vehicle continuously on short trips.

►

Do not stop the regeneration trip until the indi-

cator lamp goes out.

This procedure causes the particulate filter to re-

generate itself and may take some time (approx.

30 minutes).

Emission control system

If the indicator lamp does not go out, drive to a



If the indicator lamp

lights up or flashes, mal-

qualified workshop and have the fault rectified.

functions have occurred which are relevant for

emissions. These malfunctions may reduce the

quality of the exhaust gas and damage the



319

Checking and topping up fluids -> Emission control system for Your Audi Rs Q8 SUV First Generation (2020-2026)

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