Get Checking and topping up fluids -> Emission control system Guide for Audi RS6 4 Door Fourth Generation (2019-2025)

Checking and topping up fluids

►

Screw the end of the hose 1 clockwise onto

the opening on the canister A .

Remove the cap 2 from the other end of the

After refilling AdBlue

Closing the filler neck

►

hose B .

►

Screw the AdBlue cap clockwise onto the filler

►

Fit the end of the hose 2 onto the filler neck

on the vehicle and turn clockwise as far as the

stop to secure.

Lift the canister and then tilt it. Keep it tilted

until empty or until no more fluid runs into the

tank.

neck until the AdBlue cap clicks audibly ð

Before refilling AdBlue on page 231, ð

Before refilling AdBlue on page 231.

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

should hear it click into place).

►

After refilling

►

Turn the hose anti-clockwise to remove it.

►

Remove the canister and screw the tank cap

back on ðpage 232, After refilling AdBlue.

The vehicle must be driven so that the system

can detect the AdBlue which has been added.

This process can take several minutes.

CAUTION

►

If the AdBlue tank had run dry and a range of

Use only refill canisters of the correct type ap-

proved for your vehicle. AdBlue may leak out

if you use another system.

0 km was shown on the display, switch on the

ignition for approx. 30 seconds before starting

the engine.

AdBlue can freeze at very low temperatures. Re-

strictions may therefore be encountered when re-

filling. In this case, the system may not detect

AdBlue when you refill and will continue to indi-

cate a low AdBlue level. The message will disap-

pear as soon as the tank has thawed.

Refilling AdBlue from a bottle

Refill bottles are available from qualified work-

shops. Approved refill bottles contain about 1.9

litres of AdBlue.

►

Take the cap off the refill bottle ð

refilling AdBlue on page 231, ð

filling AdBlue on page 231.

in Before

in Before re-

Emission control system

►

Screw the bottle clockwise onto the filler neck

as far as it will go.

To empty the bottle, lightly press the bottom of

the bottle. Keep pressing the bottom of the

bottle until the bottle is empty, or until no

more fluid runs into the tank.

Unscrew the bottle anti-clockwise without ap-

plying pressure.

Remove the bottle and screw the tank cap back

on ðpage 232, After refilling AdBlue.

Introduction

WARNING

The exhaust system is very hot when the vehi-

cle is being driven and after the engine has

been switched off.

►

– Never touch the tailpipes when they are hot

– risk of burns!

– 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!

CAUTION

Use only refill bottles of the correct type ap-

proved for your vehicle. AdBlue may leak out

if you use another system.

– Do not apply any underseal agents in the

area around the exhaust system – risk of

fire!

232

Checking and topping up fluids

The engine must be warmed up prior to the re-

generation trip.

Information on the catalytic converter

Please refer to the safety information

ðpage 232, Introduction.

►

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.

The vehicle must only be used with unleaded pet-

rol, otherwise the catalytic converter will be ir-

reparably damaged.

►

Repeat this procedure (accelerate to at least

80 km/h and coast again) until the indicator

lamp goes out.

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.

This procedure causes the particulate filter to re-

generate itself and may take some time.

If the indicator lamp does not disappear after a

while, drive to a qualified workshop and have the

fault rectified.

Information on the particulate filter

Please refer to the safety information

ðpage 232, Introduction.

Regenerating the particulate filter by driving

at a constant speed

Applies to: vehicles with diesel engine

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).

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

temperature, the soot in the filter will be

burned off.

. As a result of the increase in

Driver messages about the particulate filter



Particulate filter: can be cleaned by driving

vehicle. You can continue driving. See owner's

manual

►

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).



Particulate filter: can be cleaned by driving

vehicle. You can continue driving. See owner's

manual

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

qualified workshop and have the fault rectified.

Different regeneration procedures are required,

depending on the type of engine (petrol or die-

sel).

Information on the particulate filter

As a result of the high temperatures which occur

during the regeneration of the particulate filter,

the radiator fan may continue to run after the en-

gine is switched off, even if the engine has not

yet reached operating temperature.

Regenerating the particulate filter by driving

and coasting

Applies to: vehicles with petrol engine

Before starting the regeneration trip, check

whether regenerating the particulate filter by

driving and coasting is the correct method for

Noises, odours and increased engine speeds

when idling may be noticed during regeneration.



your vehicle (based on the engine) ð

233

Checking and topping up fluids

Applies to vehicles with diesel engine: If the indi-

cator lamp requesting you to refuel the vehicle

 also appears in the instrument cluster during

the regeneration trip, the particulate filter regen-

eration process may be interrupted. Drive to a

filling station and then resume the regeneration

trip after refuelling the vehicle.

Engine compartment

Safety information on the engine

compartment

Extra caution is necessary when working on

components in the engine compartment.

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 ob-

serve the warnings listed below and follow all

normal safety precautions. The engine compart-

ment of any motor vehicle is a potentially haz-

ardous area. ð

To maximise the service life of the particulate fil-

ter, always use suitable engine oil and the correct

fuel. You should also avoid driving the vehicle

continuously on short trips.

WARNING

When regenerating the particulate filter, it is

essential that you adjust your speed to suit

the weather, road, terrain and traffic condi-

tions – risk of accident! The recommendation

must never lead to the driver disregarding lo-

cal traffic regulations.

Explanation of warning symbols:

Sym- Description

bol

Observe all warnings – risk of injury!



CAUTION

Hot components!



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.

Rotating parts!

Hot surfaces. The heat generated during

operation can lead to hot surfaces on in-

dividual components. Do not touch com-

ponents – risk of burns!





Fan can switch on at any time!

High voltage! The voltage of these com-

ponents (such as the high-voltage sys-

tem or ignition system) is lethal! Touch-

Information on the emission control

system



ing damaged live high-voltage compo-

nents could cause you to be fatally elec-

trocuted.



If the indicator lamp

lights up or flashes, mal-

functions have occurred which are relevant for

emissions. These malfunctions may reduce the

quality of the exhaust gas and damage the cata-

lytic converter, for example. Drive slowly to a

qualified workshop without delay and have the

fault rectified.

High voltage! Switch off the engine be-

fore touching any part of ignition sys-

tem!



Hot coolant – risk of scalding!



The indicator lamp may also light up if the fuel

tank flap has not been closed properly

Always read the instructions in the Own-

er’s Manual.

ðpage 227





Depends on engine and country

234

Checking and topping up fluids -> Emission control system for Your Audi RS6 4 Door Fourth Generation (2019-2025)

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