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

Checking and topping up fluids

Petrol

Checking and topping up

fluids

Applies to: vehicles with petrol engine

The correct fuel grade for your vehicle is listed in-

side the fuel tank flap.

Fuel

1)

Identification of fuels

The vehicle is equipped with a catalytic converter

and must only be run on unleaded petrol. Petrol

must be sulphur-free and must comply with the

EN 228 fuel quality standard or equivalent. The

petrol grades have different octane (RON) or An-

ti-Knock Index (AKI) ratings.

The following headings relate to the sticker on

the inside of your vehicle's fuel tank flap (exam-

ple):

95 RON/ROZ or min. 91 RON/ROZ

Fig. 193 Fuel tank flap sticker: Identification of fuels (ex-

amples)

The use of premium petrol (95 RON / 91 AKI) is

recommended. If that type of fuel is not availa-

ble, regular petrol (at least 91 RON / 87 AKI) can

be used with a slight loss of power.

The correct fuel grade for your vehicle is listed in-

side the fuel tank flap.

The symbols signify different fuels. Depending on

the fuel, the individual symbols may be found on

the vehicle’s fuel tank flap. In some countries,

you will also find the information on the fuel

pumps. This is intended to help prevent incorrect

fuel from being used. Only fill the tank with the

fuel types shown on the vehicle’s fuel tank flap.

min. 95 RON/ROZ

Premium petrol (at least 95 RON / 91 AKI) must

be used.

If premium petrol is not available, the engine can

be run on regular petrol with 91 RON / 87 AKI as

an emergency measure. In this case only use

moderate engine speeds and a light throttle. Fill

up with premium or Super Plus petrol as soon as

possible.

–

1 Petrol with ethanol: “E” stands for ethanol.

The number refers to the proportion of ethanol

in the petrol. For example, “E5” means that the

fuel contains a maximum of 5% ethanol.

2 Petrol with ethanol: “E” stands for ethanol.

The number refers to the proportion of ethanol

in the petrol. For example, “E10” means that

the fuel contains a maximum of 10% ethanol.

3 Diesel with biodiesel: “B” stands for biodie-

sel. The number refers to the proportion of bio-

diesel in the diesel. For example, “B7” means

that the fuel has a maximum of 7% biodiesel

content.

98 RON/ROZ or min. 95 RON/ROZ

The use of Super Plus petrol (98 RON / 93 AKI) is

recommended. If that type of fuel is not availa-

ble, premium petrol (at least 95 RON / 91 AKI)

can be used with a slight loss of power.

If premium petrol is not available, the engine can

be run on regular petrol with 91 RON / 87 AKI as

an emergency measure. In this case only use

moderate engine speeds and a light throttle. Fill

up with premium or Super Plus petrol as soon as

possible.

–

4 Diesel: “XTL” stands for paraffinic diesel.



1)

May vary in different countries.

310

Checking and topping up fluids

Diesel can thicken at very low temperatures,

which can result in problems starting the engine

or prevent the engine from running smoothly.

For this reason, filling stations in some countries

offer winter-grade diesel during the cold months

so that you can continue to operate your vehicle

reliably. Ask at your filling station whether the

diesel available there is suitable for the current

conditions and for the temperatures which could

potentially occur.

CAUTION

– Do NOT fuel your vehicle with high-ethanol

fuel blends (e.g. E30 – E100). This will dam-

age the fuel system.

– Do NOT fuel your vehicle with high-metha-

nol fuel blends (e.g. M15 – M100), because

this will damage the fuel system and the en-

gine.

– Even one tankful of leaded fuel would per-

manently impair the efficiency of the cata-

lytic converter.

CAUTION

– Audi recommends that you use only addi-

tives approved by Audi. Additives that have

not been approved by Audi may cause en-

gine damage. Additives with so-called oc-

tane boosters or antiknock additives can

contain metallic additives that cause signifi-

cant damage to the engine and the catalytic

converter. Do not use such additives.

– Metal-based fuels, which can be identified

from the marking on the fuel dispenser,

must not be used. LRP fuel (lead replace-

ment petrol) also contains high concentra-

tions of metallic additive. Risk of engine

damage!

– Never use FAME fuels (biodiesel), petrol,

heating oil, thinners or any other fuels or

additives, as these could cause serious dam-

age to the fuel system and the engine.

– Never start the engine if you fill up with the

wrong type of fuel, as this could damage

the fuel system and the engine. Seek pro-

fessional assistance.

1)

Paraffinic diesel

Applies to: vehicles suitable for paraffinic diesel

The correct fuel grade for your vehicle is listed in-

side the fuel tank flap.

– 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.

You can use sulphur-free paraffinic diesel that

complies with the EN 15940 standard if the

“XTL” symbol is on the sticker inside your vehi-

cle’s fuel tank flap. You must not use this fuel if

the symbol is not on the sticker.

Note

Please also refer to the description of diesel

ðpage 311.

– You can use higher octane fuel than your en-

gine requires.

– In countries where sulphur-free fuel is not

available, you may use low-sulphur fuel in-

stead.

Filling the tank

Driver messages

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

Diesel

Applies to: vehicles with diesel engine

The correct fuel grade for your vehicle is listed in-

side the fuel tank flap.

Driver messages

If the indicator lamp  lights up and a corre-

sponding message appears, you should add fuel

to the vehicle’s tank.

The use of sulphur-free diesel complying with

the EN 590 standard is recommended.



1)

This fuel is available in certain countries only.

311

Checking and topping up fluids

 Tank system malfunction! Please contact

Procedure for filling the tank

workshop

There is a malfunction in the tank system. Drive

to a qualified workshop without delay and have

the fault rectified.

Vehicle refuelled. Reset km/miles now?

Select Yes if you want to reset the trip recorder

to zero.

The display of this message depends on the

amount of fuel in the tank and the amount of

fuel added.

Fig. 194 Vehicle as seen from the rear right: Opening fuel

tank flap

Driver messages

Applies to: vehicles with plug-in hybrid drive

 Tank flap: fault. Release tank flap manually.

See owner's manual

or

 Tank flap: fault. Refuelling not possible. See

owner's manual

A malfunction has occurred. The tank flap must

Fig. 195 Fuel tank flap with tank cap attached

be released manually ðpage 314.

The fuel tank flap is unlocked/locked automati-

cally by the central locking system.

 Warning! Limited performance

The fuel tank is almost empty. You should be pre-

pared for a significant loss of performance. Drive

to a filling station without delay.

►

If necessary, unlock the vehicle.

Conventional power unit: Press the left side of

the flap to open it ðFig. 194.

►





/

Please refuel and recharge battery. To-

►

Plug-in hybrid drive: Pull the  button in the

driver's door. Once the air has been released,

the tank flap will automatically open slightly.

Unscrew the tank cap anti-clockwise.

Hook the cap onto the open flap ðFig. 195.

Plug-in hybrid drive: Read the notes on refuel-

ling at the end of this chapter.

Insert the filler nozzle into the fuel filler neck

as far as the stop.

Start refuelling. The filler nozzle cuts out as

tal range x km

or

►





/

Tank system: please refuel immediately

and recharge battery. Total range: x km

If the indicator lamp lights up and the message

appears, refuel the vehicle without delay; the

high-voltage battery is also empty ðpage 141.

►

 Tank flap open. Please press button again to

refuel

soon as the fuel tank is full ð

.

When the fuel filler pump switches itself off,

wait for 5 seconds before pulling out the filler

nozzle so that any remaining fuel can flow into

the tank opening.

Screw on the tank cap clockwise until it clicks

audibly.

When you press the  button in the driver’s

door, you have a certain amount of time to refuel

the vehicle. After this time, it is necessary to

press the  button again before refuelling.

►

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

should hear it click into place).



312

Checking and topping up fluids

The correct fuel grade for your vehicle is given on

a sticker on the inside of the fuel tank flap. Fur-

ther notes on fuel ðpage 310.

WARNING

Audi recommends you NOT to carry a spare

fuel canister in the vehicle. Fuel could escape

from the canister and catch fire, particularly

in the event of an accident. Fire, explosions

and injuries could result.

The tank capacity of your vehicle is given in the

Technical data section ðpage 378.

To prevent fuel and vapours from escaping, make

sure that the fuel tank is properly sealed; other-

¹⁾

– If, in exceptional circumstances, you have to

carry a spare fuel canister, please observe

the following warnings:

wise the indicator lamp

will light up.

WARNING

– Always place the spare fuel canister on the

ground before filling it. Never fill fuel into

the spare fuel canister with the canister

placed in or on top of the vehicle. Electro-

static electricity can build up while filling

the canister and ignite the fuel vapours.

– When using metal fuel canisters, always

keep the filler nozzle in contact with the

canister to prevent the build-up of static

electricity.

Improper refuelling and improper handling of

fuel can cause explosions, fire, serious burns

and other injuries.

– Do not smoke. Keep naked flames away

from the vehicle.

– The ignition must be switched off when re-

fuelling.

– Mobile phones and radio equipment must

always be switched off when refuelling.

Electromagnetic radiation can cause sparks

which could start a fire.

– Keep the filler nozzle inserted as far as

possible into the filler opening while fill-

ing the canister.

– The auxiliary heating* must be switched off

when refuelling.

– Observe all relevant local regulations on

using, storing and transporting spare fuel

canisters.

– Fuel can escape if you do not insert the filler

nozzle all the way into the filler neck. Escap-

ing fuel can ignite and cause a fire.

– Never get into the vehicle while refuelling. If

you do have to get into the vehicle in excep-

tional circumstances, close the door and

touch a metal surface before handling the

filler nozzle again. This will discharge any

static electricity which could generate

sparks. Sparks can start a fire when refuel-

ling.

CAUTION

– If fuel overflows onto the vehicle, remove it

completely straight away to prevent dam-

age to the vehicle.

– Never run the tank completely dry. If there

is an irregular fuel supply, misfiring can oc-

cur. As a result unburnt fuel can enter the

exhaust system and cause damage to the

catalytic converter(s).

– The filler nozzle cuts out as soon as the fuel

tank is full. Do not try to put in more fuel af-

ter the nozzle cuts out, as this will fill the

expansion chamber in the fuel tank. Do not

try to put in more fuel after the automatic

filler nozzle has switched off; this may cause

the fuel to overflow if it becomes warm, po-

tentially at a later point in time. This can

cause explosion, fire and serious or fatal in-

juries.

– Vehicles with diesel engine: When filling

the fuel tank after having run it completely

dry, the ignition must be switched on for at

least 30 seconds without starting the en-

gine. When you then start the engine it may

take longer than normal (up to one minute)

for the engine to start firing. This is because

air needs to be bled from the fuel system

while starting.



1)

Depends on engine and country

313

Checking and topping up fluids

from the tank system, pull the  button in

the driver's door again.

For the sake of the environment

– Do not try to put in more fuel after the au-

tomatic filler nozzle has switched off; this

may cause the fuel to overflow if it becomes

warm.

– If the engine has switched itself off due to a

lack of fuel, you may need to add up to 15

litres of fuel for the vehicle to detect that it

has been refuelled. Otherwise it may not be

possible to restart the engine.

– Never pour fuel down drains or into the

ground.

– Fuel can age and cause starting problems.

Audi recommends refuelling your vehicle

within six months.

Note

The fuel tank flap is not locked when you lock

the vehicle from the inside by pressing the

central locking switch.

Having the fuel tank flap released

manually

►

If you cannot open the fuel tank flap, seek pro-

fessional assistance.

Note

Applies to: vehicles with diesel engine

►

Then drive to a qualified workshop and have the

fault rectified.

Diesel vehicles are equipped with an incorrect

fuelling protection system . This system en-

1)

sures that the tank can only be fuelled from a

diesel filler nozzle.

Selective catalytic

– If the filler nozzle is old, damaged or too

small, it may not be able to open the pro-

tection mechanism on the fuel tank. In this

case, try turning the filler nozzle before in-

serting it in the fuel filler neck, use a differ-

ent filling pump or seek professional assis-

tance.

reduction (AdBlue/DEF)

General information

Applies to: vehicles with selective catalytic reduction

On vehicles with selective catalytic reduction, a

urea solution (AdBlue/DEF) is injected into the

exhaust system upstream of a NOx catalytic con-

verter in order to reduce nitrogen oxide emis-

sions. The catalytic converter changes nitrogen

oxides into nitrogen and water with the help of

the urea solution AdBlue/DEF. The urea solution

is known as AdBlue or DEF (Diesel Exhaust Fluid).

The term AdBlue is used below.

– The protection mechanism will not open if

you try to add fuel from a spare fuel canis-

ter. You can get round this simply by adding

the diesel slowly.

Note

Applies to: vehicles with plug-in hybrid drive

The AdBlue is held in a separate tank in the vehi-

cle. AdBlue consumption is normally between

1.0 ltr. – 2.5 ltr./1000 km. In individual cases,

the consumption may be different as a result of

how the vehicle is driven along with the operat-

ing and ambient temperature.

– When you insert the filling nozzle, make

sure that it does not press against the tank

flap release mechanism 1 (see label inside

tank flap 2 ðFig. 195). Otherwise, a valve

in the filler neck will close and the refuelling

process will be interrupted although the

tank is not yet full.

It is not sufficient to simply have AdBlue refilled

when the vehicle is serviced because this may be

necessary more often than services are due or be-

tween service intervals.

– If you have pressed the tank flap release

mechanism unintentionally, you will need to

bleed the air from the tank system again. It

is not necessary to remove the filling nozzle

from the filler neck to do so. To bleed the air

As soon as a message appears in the instrument

cluster display reminding you to refill AdBlue,



1)

Depending on country

314

Checking and topping up fluids

you must refill the AdBlue tank or have this done

by a qualified workshop ðpage 316.

tain level. You should always fill up with AdBlue

when requested to do so on the instrument clus-

ter display.

Legal information

 Please refill at least x ltr. of AdBlue/DEF the

next time you refuel. Range x km

– It is not permitted to make technical changes

to the emission control system which have an

effect on the exhaust gas treatment using

AdBlue.

This message tells you the maximum distance

that you can drive with the remaining amount of

AdBlue. Refill AdBlue.

– Audi has approved this vehicle for use only with

AdBlue corresponding to ISO-22241-1, for

which the Certificate of Conformity for this type

of vehicle has been issued.

 Refill at least x ltr. of AdBlue/DEF. No re-

start in x km. See owner's manual

This message tells you the maximum distance

that you can drive with the remaining amount of

AdBlue. Refill AdBlue. Otherwise, after driving

the maximum distance and switching off the en-

gine, you will not be able to restart the car. You

can also call up the remaining distance on the on-

board computer.

– It may be a crime to operate the vehicle without

the AdBlue which corresponds to ISO-22241-1.

– If the emission control system is not operated

as intended, the exhaust emissions may wor-

sen.

– The use of AdBlue for the operation of this vehi-

cle is required by law.

 Refill at least x ltr. of AdBlue/DEF. Engine

cannot be restarted. See owner's manual

Note

– The instrument cluster display will tell you

how far you can drive before the tank runs

dry ðpage 315, Low AdBlue level. If the

AdBlue tank runs dry, the engine cannot be

started again after you switch off the igni-

tion. Never run the AdBlue tank completely

dry.

This message appears when there is no more

AdBlue left in the tank. Refill AdBlue. Otherwise,

you will not be able to restart the car after you

switch off the engine.

When the AdBlue in the tank reaches the mini-

mum level, you must add AdBlue ðpage 316,

Before refilling AdBlue.

– Restrictions may be encountered when re-

filling in very cold temperatures, because

the freezing point of AdBlue is -11 °C.

– The system is heated when the vehicle is

running to ensure that the exhaust gas

treatment operates even at very low tem-

peratures.

Filling the wrong fluid / system fault

If you fill the AdBlue tank with a fluid other than

AdBlue and the system detects that the wrong

fluid has been added or there is a system fault, a

driver message will appear.

 Please check AdBlue/DEF. See owner's man-

ual

Instrument cluster display

Applies to: vehicles with selective catalytic reduction

This message appears if the system detects that

the tank has been filled with the wrong fluid or

with non-standard AdBlue or if there is a system

fault. Drive to a qualified workshop and have the

fault rectified.

The display informs you if the AdBlue level is too

low or if a system malfunction occurs.

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

 AdBlue/DEF: fault. No restart in x km. See

owner's manual

Low AdBlue level

This message appears if the system detects that

the tank has been filled with the wrong fluid or

A series of warnings will inform you if the

amount of AdBlue in the tank falls below a cer-



315

Checking and topping up fluids

►

with non-standard AdBlue or if there is a system

fault and the vehicle can only be driven as far as

indicated in the instrument cluster. Drive to a

qualified workshop and have the fault rectified.

Otherwise, after driving the maximum distance

and switching off the engine, you will not be able

to restart the car.

Refill AdBlue from a filler nozzle ðpage 316,

canister ðpage 317 or bottle ðpage 317.

WARNING

AdBlue can cause irritation to the skin, eyes,

and respiratory organs. Wash thoroughly with

clean water should you come into contact

with this fluid. Seek medical assistance if nec-

essary.

 AdBlue/DEF: fault. Engine cannot be restar-

ted. See owner's manual

This message appears if the system detects that

the tank has been filled with the wrong fluid or

with non-standard AdBlue or if there is a system

fault. Drive to the nearest qualified workshop

without delay and have the fault rectified. You

will not be able to restart the car after you switch

off the engine.

CAUTION

– Improper handling of AdBlue can cause

damage to the vehicle not covered by the

warranty.

– Use only AdBlue that complies with the ISO

22241-1 standard. Do not mix AdBlue with

additives and do not dilute it with water.

– AdBlue must not be added to the diesel

tank, and diesel must not be added to the

AdBlue tank. Never start the engine if you

fill up with the wrong type of fuel, as this

could damage the tank system and the en-

gine. Seek professional assistance.

Before refilling AdBlue

Applies to: vehicles with selective catalytic reduction

– AdBlue attacks surfaces such as paintwork,

plastic veneer and carpets. Remove spilt flu-

id as soon as possible with a damp cloth and

plenty of water. If the AdBlue has already

solidified, use warm water and a sponge.

Residues of AdBlue solidify after a while if

they are not removed and can damage the

affected surface.

Fig. 196 Vehicle as seen from the rear right: Unscrewing

the AdBlue cap

– Do not keep refill bottles or canisters in the

vehicle, as AdBlue can leak and damage the

vehicle interior.

The AdBlue filler neck is located immediately be-

side the diesel filler neck.

The AdBlue tank capacity on your vehicle is given

in the Technical data section ðpage 378.

– Keep AdBlue away from clothing. Wash

thoroughly with clean water should you

come into contact with this fluid.

When the instrument cluster displays the re-

quest to fill up AdBlue, fill up at least the

amount of AdBlue displayed. If you do not refill

this amount of fluid, the system may not detect

that the tank has been refilled and it may not be

possible to restart the engine.

Note

Please follow the AdBlue manufacturer's in-

structions for storage and use.

Refilling AdBlue from a filler nozzle

Applies to: vehicles with selective catalytic reduction

►

Park the vehicle on a level surface.

Switch off the ignition.

►

Open the fuel tank flap ðpage 312.

Fill up with AdBlue until the first time the filler

►

Unscrew the cap on the filler neck anti-clock-

nozzle cuts off the supply ð

.



wise ðFig. 196.

316

Checking and topping up fluids

►

Put the tank cap back on ðpage 318, After re-

filling AdBlue.

Lift the canister and then tilt it. Keep it tilted

until empty or until no more fluid runs into the

tank.

►

Turn the hose anti-clockwise to remove it.

Remove the canister and screw the tank cap

back on ðpage 318, After refilling AdBlue.

CAUTION

– The handle of the filler nozzle must point

downwards when filling the tank. Otherwise

the filler nozzle will not cut off the supply

automatically ð in Before refilling AdBlue

on page 316.

CAUTION

Use only refill canisters of the correct type ap-

proved for your vehicle. AdBlue may leak out

if you use another system.

– Do not use a damaged filler nozzle in case it

does not cut off the supply properly.

– You should stop refilling the first time the

filler nozzle automatically cuts off the sup-

ply. Otherwise the level of AdBlue in the

tank may be too high and AdBlue could

overflow ð in Before refilling AdBlue on

page 316.

Note

– Your qualified workshop can tell you which

refill canisters are approved for your vehicle.

– Approved refill canisters contain about 5 li-

tres of AdBlue.

Note

Refilling AdBlue from a bottle

You can fill AdBlue from pumps for either

light passenger vehicles or heavy goods

vehicles.

Applies to: vehicles with selective catalytic reduction

►

Take the cap off the refill bottle ð

refilling AdBlue on page 316, ð

filling AdBlue on page 316.

in Before

in Before re-

Refilling AdBlue from a canister

Applies to: vehicles with selective catalytic reduction

►

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 318, After refilling AdBlue.

CAUTION

Fig. 197 Canister with screw-on hose

Use only refill bottles of the correct type ap-

proved for your vehicle. AdBlue may leak out

if you use another system.

►

Take the cap off the refill canister ð

fore refilling AdBlue on page 316, ð

fore refilling AdBlue on page 316.

in Be-

►

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

hose B .

Fit the end of the hose 2 onto the filler neck

on the vehicle and turn clockwise as far as the

stop to secure.

Note

– Refill bottles are available from qualified

workshops.

– Approved refill bottles contain about 1.9 li-

tres of AdBlue.

317

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.

in

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!

Or



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

catalytic converter, for example. Drive slowly to a

qualified workshop without delay and have the

fault rectified.

WARNING

A vehicle’s engine compartment is a potential-

ly hazardous area and working there can lead

to serious injuries.

The indicator lamp may also light up if the fuel

tank flap has not been closed properly

– Always exercise extreme caution when work-

ing in the engine compartment. Always keep

to the generally accepted safety procedures

and use your common sense. Never put

yourself at risk of injury.

1)

ðpage 312

.

Engine compartment

General information

– Do not perform any work in the engine com-

partment if you do not fully understand the

procedure or if you do not have suitable in-

formation, tools and equipment.

Extra caution is necessary when working on com-

ponents 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

– If you are not sure how to proceed, have the

work performed by a qualified workshop.

Work which is not performed properly can

cause serious injuries.

WARNING

– Switch off the engine.

– Switch off the ignition.

Explanation of warning symbols:

– Apply the parking brake.

Observe all warnings – risk of injury!

– Select transmission position P (Park).

– Wait for the engine to cool down.

– Keep children away from the engine com-

partment.



Hot engine parts!

Rotating parts!



– Never spill fluids on a hot engine. These flu-

ids can cause a fire (e.g. radiator anti-

freeze).

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-

– Take care not to cause short circuits in the

electrical system.

– Never touch the radiator fan. The fan is tem-

perature-controlled and may switch on sud-

denly even if the ignition is switched off.

– To avoid the risk of being scalded, never

open the bonnet if you see steam or coolant

escaping from the engine compartment.

Wait until no steam or coolant can be seen

before opening the bonnet.



ing damaged live high-voltage compo-

nents could cause you to be fatally elec-

trocuted.

High voltage! Switch off the engine be-

fore touching any part of ignition sys-

tem!



The catalytic converter can be damaged

if the engine oil level is too high!



– Plug-in hybrid drive: The cap on the coolant

expansion tank for the high-voltage system

is fitted with a sealing tag which must not

be removed under any circumstances

ðpage 323, Fig. 200. If there is no sealing

Hot coolant – risk of scalding!



Always read the instructions in the Own-

er’s Manual.





1)

Depends on engine and country

320

Checking and topping up fluids

tag on the coolant expansion tank for the

high-voltage system, please take the vehicle

to a qualified workshop.

– Always keep an approved fire extinguisher

immediately available.

– Any work on the batteries and electrical sys-

tem in your vehicle entails a risk of injury

and chemical burns in addition to danger of

accident or fire. For this reason, you must

have the work carried out by a qualified

workshop.

– Plug-in hybrid drive: The cap and sealing tag

on the coolant expansion tank for the high-

voltage system must only be opened by a

qualified workshop.

– The cap on the coolant expansion tank must

not be opened if the coolant is hot. The cool-

ing system is under pressure; there is a risk

of being scalded.

– Do not expose yourself to exhaust gases or

chemical substances for any longer than

necessary.

– Protect face, hands and arms by covering

the cap with a large, thick cloth to protect

against escaping coolant and steam.

– Never remove the engine cover panel – risk

of burns!

CAUTION

When topping up fluids make sure the correct

fluid is put into the correct filler opening. This

can otherwise cause serious malfunctions or

engine damage.

– Never touch ignition cables or other compo-

nents of the electronic high-voltage ignition

system while the engine is running or being

started – risk of electrocution!

For the sake of the environment

Inspect the ground underneath your vehicle

regularly so that any leaks are detected at an

early stage. If you find spots of oil or other

fluids, have your vehicle inspected by a quali-

fied workshop.

– The accelerator pedal must on no account

be pressed inadvertently when a gear is en-

gaged and the engine is running with the ve-

hicle stationary. The vehicle will otherwise

start moving immediately and could cause

an accident.

– If any tests or repairs have to be performed

with the engine running, there is an extra

safety risk from the rotating parts, such as

the drive belts, alternator and radiator fan,

etc:

– First apply the parking brake and select

transmission position P (Park).

– Always make sure that no parts of the

body, jewellery, ties, loose items of cloth-

ing or long hair can become caught up in

rotating engine parts. Before commencing

any work, always remove ties and jewel-

lery, tie back long hair and wear tight

clothing to prevent these from becoming

caught up in the engine parts.

– Observe the following additional warnings if

work on the fuel system or the electrical sys-

tem is necessary:

– Do not smoke.

– Never work near naked flames.

321

Checking and topping up fluids

►

Lift the bonnet slightly ð

.

Opening/closing bonnet

Press the release lever ðFig. 199 in the direc-

tion indicated by the arrow. This will release the

arrester hooks.

The bonnet is released from inside the vehicle.

►

Open the bonnet.

Closing the bonnet

►

To close the bonnet, pull it down to overcome

the spring pressure.

►

Then let it drop into the catches; do not press

down. ð

Driver messages

Fig. 198 Footwell: Release lever

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:



Warning! Bonnet not locked. Stop vehicle

and check bonnet lock

The bonnet lock is not correctly engaged. Stop

your vehicle without delay and close the bonnet.

WARNING

Fig. 199 Unlocked bonnet: Lever

– To avoid the risk of being scalded, never

open the bonnet if you see steam or coolant

escaping from the engine compartment.

Wait until no steam or coolant can be seen

before opening the bonnet.

Please refer to the safety notes ðpage 320, Gen-

eral information.

The wiper arms should be resting on the wind-

screen: make sure they are not in a raised posi-

tion. Otherwise the paint may get damaged.

– For safety reasons the bonnet must always

be completely closed when the vehicle is

moving. After closing it always check that it

is properly secured. It should not be possible

to lift the front edges of the bonnet.

– Should you notice that the bonnet is not

safely secured when the vehicle is moving,

stop the vehicle immediately and close the

bonnet properly, otherwise it could cause an

accident.

Opening the bonnet

►

Applies to vehicles with plug-in hybrid drive:

Switch off the ignition before you release the

bonnet; otherwise the combustion engine may

start automatically.

1)

►

With the door open, pull the lever  under

the dashboard in the direction indicated by the

arrow ðFig. 198.

1)

Symbol  not available in all countries.

322

Checking and topping up fluids

Engine compartment layout

Main components for checking and refilling

Fig. 200 Engine compartment layout: Example

Please refer to the safety information

ðpage 320, General information.

cap may be different on some engine and country

versions.

1

Jump-start terminals: under a cover (+); hex-

agon head (–) ðpage 333, Charging the 12-

volt vehicle battery, ðpage 360, Jump-start-

ing

Note

Plug-in hybrid drive*: Please note the infor-

mation for the coolant expansion tank on

ðpage 327, Checking the coolant level and

for jump-starting on ð in Preparations on

page 360.

2

3

4

5

6

7

Coolant expansion tank for combustion en-

gine () ðpage 327

Engine oil filler cap () ðpage 325, Check-

ing the engine oil level

Sticker for engine oil specification

ðpage 324

Brake fluid reservoir () under a cover

ðpage 329

Plug-in hybrid drive: Coolant expansion tank

for high-voltage system () ðpage 327

Windscreen washer container ()

ðpage 334

The positions of the brake fluid reservoir, the

coolant expansion tank and the engine oil filler

323

Checking and topping up fluids

corresponding to the standards specified

above may be used as an exception.

Engine oil

If the engine oil level is too low

Note

Audi recommends engine oil from Audi Genu-

ine Parts.

Driver messages

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:



Switch off engine. Oil pressure too low

Fig. 201 Engine oil sticker

Switch off the engine and do not drive on. Check

the engine oil level ðpage 325.

–

1 Engine oil standard

2 Engine oil viscosity

– If the engine oil level is too low, add more oil

ðpage 326. Do not drive on until the warning

lamp has gone out.

If you have to top up the engine oil, use one of

the oils that meet the engine oil standard speci-

fied on the sticker ðFig. 201. The sticker with

the specified standard is located at the front of

the engine compartment ðpage 323, Fig. 200. If

you use this oil, you can top up the engine oil lev-

el as often as necessary.

– If the engine oil level is OK but the warning

lamp still lights up, switch off the engine and

do not drive on. Seek professional assistance.



Please add oil immediately

If the specified engine oil is not available, you can

add a maximum of 0.5 litres of oil corresponding

to the following standards once between oil

changes. You should do this in emergencies only.

Switch off the engine and do not drive on. Check

the oil level ðpage 325 and top it up immediate-

ly ðpage 326.



Please add max. x ltr. oil. You can continue

– Applies to petrol engines: Standards:

VW 504 00, ACEA C3, ACEA C4, API SP or ILSAC

GF-6A. All viscosity classes of these standards

are allowed.

driving

Add the amount of oil shown soon ðpage 326.



Please reduce oil level

– Applies to diesel engines: Standards:

VW 507 00, ACEA C3, ACEA C4 or API CK-4. All

viscosity classes of these standards are al-

lowed.

The engine contains too much oil – risk of dam-

age to the catalytic converter and engine. Drive

to a qualified workshop without delay to have any

excess oil extracted. Avoid high engine speeds,

full acceleration and heavy engine loads.

Audi recommends having the oil changed by a

qualified workshop.



Oil level sensor: engine oil change required.

Please contact workshop

CAUTION

The engine oil has become contaminated with

fuel. In this case, the oil level gradually rises and

the quality of the engine oil decreases. Do not at-

tempt to correct the level by extracting engine oil

– risk of engine damage. Drive to a qualified

workshop soon to have the engine oil changed.

Audi recommends that you use the types of

engine oil that have been formulated to con-

form to the corresponding VW standard. Us-

ing engine oil that does not meet these quali-

ty requirements may cause damage to the en-

gine. In an emergency, 0.5 ltr. of engine oil



324

Checking and topping up fluids



Oil level sensor system: fault. Please contact

Checking the engine oil level

workshop

You can check the engine oil level on the MMI.

The sensor for checking the engine oil level has

failed. Drive to a qualified workshop soon and

have the fault rectified.

Please refer to the safety information

ðpage 320, General information.

►

Park the vehicle on a level surface.

Switch off the warm engine.

Switch on the ignition again without starting

the engine.

Wait for about 5 minutes for the engine oil to

drain back into the sump.



Oil pressure sensor: fault. Please contact

►

workshop

►

The sensor for checking the engine oil pressure

has failed. Drive to a qualified workshop soon

and have the fault rectified.

►

Applies to MMI: On the home screen, select



Please warm up engine

CAR > Settings & service > Oil level.

Read off the oil level on the display. Top up the

engine oil if the bar in the oil level display is

near the “min” mark ðpage 326.

It is possible for fuel to enter the engine oil, es-

pecially at low outside temperatures. The tem-

perature of the engine oil needs to be high

enough so that the fuel in it can evaporate.

►

Drive in transmission position S.

CAUTION

There is a risk of engine damage if the engine

oil level is too low or too high.

Run the engine at high rpm speeds but avoid us-

ing full throttle.

You should drive for at least 30 minutes; however

it is possible that the indicator lamp may not go

out during this period. Repeat the procedure at

your convenience.

Note

The oil level shown on the MMI is intended

solely for information purposes. The indicator



lamp

and a driver message are shown in

If the indicator lamp does not disappear after

several runs, drive to a qualified workshop and

have the fault rectified.

the instrument cluster if the oil level is too

low. Add more engine oil ðpage 326, Top-

ping up the engine oil.

WARNING

Note

When responding to the message  Please

warm up engine, it is essential that you ad-

just your speed to suit the weather, road, ter-

rain and traffic conditions. The recommenda-

tion must never lead to the driver disregard-

ing local traffic regulations.

Depending on how you drive and the condi-

tions in which the car is used, oil consumption

can be up to 0.5 ltr./1000 km. Oil consump-

tion on RS models can be up to 0.8 ltr./1,000

km. Oil consumption is likely to be higher for

the first 5,000 km. The engine oil level must

be checked at regular intervals, preferably

when refuelling and before a journey.

Note



The oil pressure warning lamp

is not an in-

dicator for the oil level. The oil level should

therefore be checked regularly.

325

Checking and topping up fluids

Topping up the engine oil

CAUTION

No additives should be used with engine oil.

These could cause engine damage.

For the sake of the environment

– Never pour oil down drains or into the

ground.

– Always observe local regulations when dis-

posing of empty oil canisters.

Fig. 202 Engine compartment: Engine oil filler cap (exam-

ple)

Cooling system

Coolant

Please refer to the safety information

The engine cooling system is filled at the factory

with a mixture of conditioned water and coolant

additive. This coolant must not be changed.

ðpage 320, General information.

►

Switch off the engine.

►

Open the bonnet ðpage 322.

►

The coolant level is monitored by a warning lamp

. However, it is advisable to check it occasion-

ally.

Unscrew the cap  from the oil filler opening

ðFig. 202.

Carefully add 0.5 litres of suitable engine oil

ðpage 324.

Screw the filler cap back on.

Close the bonnet ðpage 322.

Switch the ignition on again after two minutes

and read off the current oil level on the MMI

ðpage 325, Checking the engine oil level.

Applies when using engine oil that corresponds

to the specified standard: Add a little more en-

gine oil if necessary.

Driver messages

►

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

 Switch off power unit and check coolant lev-

el. See owner's manual

►

The coolant level is too low.

Switch off the ignition and do not drive on. Check

the coolant level ðpage 327.

WARNING

– Ensure that no oil comes into contact with

hot engine components when topping up:

this could cause a fire.

– If the coolant level is too low, add more coolant

ðpage 327. Do not drive on until the warning

lamp has gone out.

– The oil filler cap must be properly closed to

prevent oil from squirting onto the hot en-

gine or exhaust system while the engine is

running – risk of fire!

 Coolant temperature: too high. Let engine

run with vehicle stationary

Let the engine cool down by running it at idling

speed for a few minutes until the warning lamp

goes out.

– Wash your skin thoroughly if it comes into

contact with engine oil.

– Engine oil is poisonous and must be kept out

of the reach of children.

– Do not drive on if the warning lamp does not

disappear. Seek professional assistance.

– Store the engine oil safely in the original

container.

 Cooling system: fault. Please switch off

power unit



326

Checking and topping up fluids

Do not drive on. Stop the engine and switch off

the ignition. Seek professional assistance.

– If the coolant system has been topped up

with a coolant additive other than the ap-

proved type (G12evo), you can continue

driving initially; however you should take

the vehicle to a qualified workshop without

delay and have the coolant changed – risk of

engine damage!

Applies to: vehicles with plug-in hybrid drive



Electric drive: fault. Cooling system. Please

contact workshop

There is a fault in the cooling system. Drive to a

qualified workshop without delay.

– The cooling system must be refilled by a

qualified workshop only – risk of engine

damage! You can obtain important informa-

tion about recommended anti-freeze addi-

tives from your qualified workshop.

Coolant additive

The coolant additive contains anti-freeze and cor-

rosion protection agent. When topping up, use

only the type of coolant additive specified below,

in combination with distilled water.

Checking the coolant level

Coolant additive

G12evo

Specification

TL 774 L

The amount of coolant additive which needs to

be mixed with the water depends on the temper-

atures to be expected in the winter season. If the

anti-freeze concentration is too low, the coolant

can freeze and cause engine damage.

Coolant

additive

Frost protec-

tion

Fig. 203 Engine compartment – coolant expansion tank

(example):

1

Cap with release catch,

2

Marks

Hot regions

Cold regions

min. 40 %

max. 45 %

min. -25 °C

(-13 °F)

Please refer to the safety information

ðpage 320, General information.

min. 50 %

max. 55 %

max. -40 °C

(-40 °F)

Applies to vehicles with plug-in hybrid drive: Your

vehicle has two separate coolant expansion tanks

ðpage 323, Fig. 200: one for the combustion

engine and one for the high-voltage system. The

coolant expansion tank for the high-voltage sys-

CAUTION

– Have your qualified workshop check the

cooling system before the winter season to

make sure that the anti-freeze concentra-

tion is adequate for the conditions to be ex-

pected. This applies particularly if you drive

into a colder climate zone.

tem is sealed and must not be opened ð

and

ð

!

Checking the coolant level

– To prevent damage to the engine, do not

use a different type of coolant additive if

G12evo is not available. In this case use only

distilled water and bring the coolant con-

centration back up to the correct level as

soon as possible by putting in the specified

additive.

►

Park the vehicle on a level surface.

Switch off the ignition.

Open the bonnet ðpage 322.

Check the coolant level in the expansion tank

ðpage 323, Fig. 200 using the external mark-

ings 2 ðFig. 203 as a guide. When the engine

is cold, the coolant level should be between the

marks 2 . When the engine is warm, it may be

slightly above the top mark.

►

– Always top up with fresh, unused coolant.

– Radiator sealants must not be added to the

coolant.



327

Checking and topping up fluids

►

Conventional power unit: Please read

ðpage 326, Cooling system before topping up

the coolant in the coolant expansion tank.

Plug-in hybrid drive: Please read ðpage 326,

Cooling system before topping up the coolant

in the expansion tank for the combustion en-

gine.

Plug-in hybrid drive: Do NOT drive on if there is

insufficient coolant in the expansion tank for

the high-voltage system. Please contact a

– Never open the bonnet if you can see or hear

steam or coolant escaping from the engine

compartment; there is a risk of being scal-

ded. The cooling system is under pressure.

Wait until you can no longer see or hear es-

caping steam or coolant.

►

– When working in the engine compartment

be aware that the radiator fan may start

running suddenly, even if the ignition is

switched off – risk of injury!

►

qualified workshop immediately ð

.

– The coolant and coolant additive can be a

health hazard. Store the coolant additive in

the original container in a safe place out of

reach of children – risk of poisoning.

Topping up the coolant

Applies to: coolant expansion tank for combustion engine

Follow the procedure described below when top-

ping up coolant in the expansion tank for the

combustion engine.

WARNING

Applies to: vehicles with plug-in hybrid drive

Important: The coolant expansion tank must not

The coolant expansion tank for the high-volt-

age system may be opened and topped up by

a qualified workshop only.

be empty ð

.

If you do need to top up the coolant, use a mix-

ture of distilled water and the specified coolant

additive. Only use non-distilled water in an emer-

gency. Always use clean water.

– The cap on the coolant expansion tank for

the high-voltage system is fitted with a seal-

ing tag which must not be removed under

any circumstances ðpage 323, Fig. 200. If

there is no sealing tag on the coolant expan-

sion tank for the high-voltage system,

please take the vehicle to a qualified work-

shop.

►

Wait for the engine to cool down.

►

Cover the cap on the expansion tank with a

large, thick cloth.

►

Press the release catch on the cap 1 ðFig. 203

and carefully screw it anti-clockwise as far as

– When coolant is added, it can get inside the

high-voltage components and cause a short

circuit – risk of fire!

the first point of resistance ð

.

►

Press down the release catch again and un-

screw the cap completely.

Add coolant in the correct concentration

ðpage 327 up to the MAX mark.

You should make sure that the fluid level re-

mains stable. If necessary, add more coolant.

Screw the cap on clockwise until you feel the

second point of resistance.

CAUTION

Coolant loss which leads to the coolant ex-

pansion tank being virtually empty normally

indicates significant leaks in the cooling sys-

tem which could result in further damage.

– Applies to coolant expansion tank for com-

bustion engine: Do not add coolant if the

coolant expansion tank is empty. Air could

have got into the cooling system – risk of

damage! In this case, do NOT drive on. Seek

professional assistance.

WARNING

– The engine compartment of any motor vehi-

cle is a potentially hazardous area. Before

carrying out any work in the engine com-

partment, stop the engine, switch off the ig-

nition and allow the engine to cool down.

Please observe the important safety warn-

ings ðpage 320, General information.

– Applies to coolant expansion tank for com-

bustion engine: If there is coolant remaining

in the tank, add more coolant. Drive to a



328

Checking and topping up fluids

qualified workshop without delay and have

the fault rectified. If the warning lamp 

comes on again, stop the vehicle and switch

off the ignition. Seek professional assis-

tance.

The brake fluid level is also automatically moni-

tored.

Driver messages

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

– Applies to coolant expansion tank for com-

bustion engine: If too much coolant has

been added to the coolant expansion tank,

drive to a qualified workshop soon and have

the coolant level corrected.

 Brakes: stop vehicle and check brake fluid

level

Stop the vehicle and check the brake fluid level.

Seek professional assistance.

– If you use non-distilled water, the chemicals

that it contains can cause serious corrosion

damage to the engine – risk of engine dam-

age!

Having the brake fluid changed

The brake fluid must be changed at regular inter-

vals by a qualified workshop. The workshop can

inform you about the service intervals for the

brake fluid change.

– If you have used a large quantity of non-dis-

tilled water (more than 0.5 ltr.) in an emer-

gency, drive directly to a qualified workshop

and have the coolant changed.

WARNING

Brake fluid

– If the brake fluid level is under the MIN

mark, the effectiveness of the brakes and

therefore the safety of the vehicle may be

impaired – risk of accident! Do not drive on.

Seek professional assistance.

– Heavy use of the brakes may cause a vapour

lock if old brake fluid is left in the system.

This would seriously impair the effective-

ness of the brakes and the safety of the car –

risk of accident!

Fig. 204 Engine compartment: Cap of brake fluid reservoir

– The brake fluid in your vehicle must comply

with the VW 501 14 standard. If this brake

fluid is not available, it is permissible to use

an alternative high-quality brake fluid com-

plying with the U.S. Federal Motor Vehicle

Standard (FMVSS) 116 DOT 4, Class 6

(ISO 4925).

Please refer to the safety information

ðpage 320, General information.

Checking the brake fluid level

The brake fluid reservoir is located underneath a

cover in the engine compartment on the driver's

side.

– If used brake fluid or brake fluid not ap-

proved for your vehicle is used, the effective-

ness of the brakes will be seriously impaired

and the brake system could even fail com-

pletely. The vehicle manufacturer will accept

no liability for faults or damage which occur

as a result. In addition, no warranty claims

will be accepted.

►

Park the vehicle on a level surface.

►

Slide the cover, which is located under the

windscreen wiper on the driver's side, towards

the windscreen and detach it.

►

Read off the brake fluid level on the brake fluid



reservoir ðpage 323, Fig. 200. The brake fluid

level must be between the MIN and MAX marks

ð

.

►

Replace the cover.

329

Checking and topping up fluids

– If the message does not disappear again, drive

to a qualified workshop and have the fault rec-

tified.

CAUTION

– If the brake fluid level is above the MAX

mark, brake fluid may escape via the cap on

the reservoir in certain circumstances and

cause damage to the vehicle.

WARNING

An electrical system fault can cause vehicle

functions to fail, thus impairing the vehicle’s

stability – risk of accident! Switch off the igni-

tion and do not drive on. Seek professional as-

sistance.

– Brake fluid must not be allowed to come in-

to contact with the vehicle's body, other-

wise it will attack the paintwork.

Electrical system

Battery

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

General information on batteries

Because of the complexity of the power supply,

any battery work, such as disconnection, replace-

ment, etc. must be carried out by a qualified





If the warning/indicator lamp

/

or

lights up, there is a power supply or battery fault

or a fault in the vehicle's electrical system.

workshop ð

.





/

Electrical system: fault. Safely stop ve-

Several batteries using different technologies

may be fitted in your vehicle:

hicle

Stop the vehicle safely and do not drive on. You

should also switch off the ignition ð . Seek pro-

fessional assistance.

– Vehicle battery (e.g. for starting the engine and

the basic supply) ðpage 332, Safety informa-

tion



Electrical system: fault. No restart possible.

– Additional battery (e.g. for recuperation and ex-

tra equipment) ðpage 332, Safety information

– Plug-in hybrid drive: High-voltage battery (e.g.

for electric driving) ðpage 139, Introduction.

Please contact workshop

When you switch off the ignition it will not be

possible to restart the vehicle. The performance

of certain vehicle functions may be limited and

the vehicle’s handling may be impaired. Drive to a

qualified workshop without delay.

If the vehicle is not used for long periods

The battery gradually becomes discharged if the

vehicle is left standing for long periods. To en-

sure that the vehicle can be started, the electrical

equipment is powered back or switched off. Cer-

tain convenience features, such as interior light-

ing or electric seat adjustment, may not be avail-

able. These functions will be restored when you

start the engine.



Electrical system: fault. Please contact

workshop

Switch off any electrical equipment which is not

required (some equipment may be switched off

automatically). The performance of certain vehi-

cle functions may be limited and the vehicle’s

handling may be impaired. Drive to a qualified

workshop without delay.

Even though some systems are deactivated auto-

matically, certain electrical equipment continues

to draw current even when the ignition is off. If

the vehicle is left standing for long periods, this

can result in total battery discharge. If the vehi-

cle battery is allowed to discharge completely, an

internal chemical reaction damages the battery

irreparably. To avoid this, the battery should be



Electrical system: low battery charge. Bat-

tery will be charged while driving

Starting reliability may be impaired.

– If this message disappears after a while, the ve-

hicle battery will have been sufficiently charged

while driving.



330

Checking and topping up fluids

recharged at least once a month ðpage 333.

Please seek advice from a qualified workshop.

– Using a 12-volt vehicle battery that does not

have the same specifications or dimensions

as the factory-fitted 12-volt vehicle battery

can cause short-circuits or fires. Serious or

fatal injuries may occur as a result.

Winter conditions

Cold weather is very hard on the 12-volt vehicle

battery. For this reason, you should have the bat-

tery checked by a qualified workshop before the

start of winter.

– Only maintenance-free and leak-proof 12-

volt vehicle batteries that have the same

specifications and dimensions as the facto-

ry-fitted 12-volt vehicle battery may be

used.

Replacing the battery

Applies to: 12-volt vehicle battery

– Charging cables or jump leads must never

be connected directly to the 12-volt battery

on your vehicle. Always use the terminals in

the engine compartment ðpage 333.

Any work on the battery must always be carried

out by a qualified workshop.

The 12-volt vehicle battery has been developed

for use in its installation location and is equipped

with safety features. If a 12-volt vehicle battery

has to be replaced, please enquire about the

electromagnetic compatibility, capacity and the

required maintenance, performance and safety

features of the new 12-volt vehicle battery be-

fore purchasing it from your qualified workshop.

The gas vent on the 12-volt vehicle battery must

always be located on the side of the negative ter-

minal. The gas vent on the side of the positive

terminal must always be sealed.

CAUTION

– If the car is left standing for long periods,

protect the 12-volt vehicle battery from

frost. The battery will be damaged irrepara-

bly if it is allowed to freeze ðpage 333,

Charging the 12-volt vehicle battery.

– Electrical components which can heat up

during operation are located behind a trim

panel underneath the luggage compart-

ment floor. To prevent these components

from overheating, objects such as blankets

must not be stored underneath the floor

panel. The components will switch off tem-

porarily if they overheat. This will be indica-

ted by a message in the instrument cluster

until the temperature has returned to nor-

mal.

When replacing the 12-volt lead battery, use only

maintenance-free 12-volt lead batteries to

standards TL 825 06 and VW 7 50 73. These

standards must be from October 2014 or later.

WARNING

– Any work on the batteries and electrical sys-

tem in your vehicle entails a risk of injury

and chemical burns in addition to danger of

accident or fire. For this reason, you must

have the work carried out by a qualified

workshop.

– Always have the 12-volt vehicle battery re-

placed by a qualified workshop because the

vehicle electronics must be calibrated as

part of the replacement procedure. Only

qualified workshops have the equipment re-

quired in order to perform the calibration

correctly.

– Always have the 12-volt vehicle battery re-

placed by a qualified workshop because the

vehicle electronics must be calibrated as

part of the replacement procedure. Only

qualified workshops have the equipment re-

quired in order to perform the calibration

correctly. If the correct equipment is not

used, safety-related functions may fail – risk

of accident!

– If a battery is used that does not meet the

quality specifications set by Audi, or that

has a battery capacity that is too low, the

vehicle’s certification for use on public roads

is void and thus also the vehicle’s registra-

tion ð

.



331

Checking and topping up fluids

If electrolyte comes into contact with the

eye, rinse the eye immediately with fresh

water for several minutes. Seek medical

assistance without delay.

For the sake of the environment



 Batteries and electric/electronic equip-

ment must be disposed of appropriately

ðpage 381, Information on waste disposal.

Keep open flames, sparks, uncovered

lights and lit cigarettes away from the

battery! Avoid sparks and short-circuits

when handling cables and electrical equip-

ment.



Safety information

Explanation of warning symbols:

 ^{Observe all warnings – risk of injury!}

The high-voltage battery is flammable.

The high-voltage battery must never be

exposed to fire, sparks or naked flames.

The high-voltage battery must always be

handled with care, in order to prevent

damage and fluid leaks.



/ Always read the instructions in the Own-



er’s Manual.

12-volt vehicle battery. High-voltage com-

ponent. Improper handling can cause

short circuits ð in General information

on batteries on page 331.



Always keep children away from batteries

and electrolyte.







With the exception of jump-starting and

charging the 12-volt vehicle battery, all

work on the 12-volt vehicle battery must

A highly explosive mixture of gases may

be given off when the battery is under

charge!

 ^{be performed by a qualified workshop}

Applies to high-voltage battery: Improper

handling of the high-voltage battery can

lead to serious or fatal injury. Never dis-

mantle the high-voltage battery and never

remove its cover.

ð

in General information on batteries

on page 331 ð in General information

on batteries on page 331.

High voltage! The voltage of the high-volt-

age system is lethal! Touching damaged

high-voltage components could cause you

to be fatally electrocuted.









Applies to high-voltage battery: Improper

handling of the high-voltage battery can

lead to serious or fatal injury. Mainte-

nance work on the high-voltage battery

must only be carried out by suitably quali-

fied and trained personnel. Never make

modifications to the high-voltage battery.

The high-voltage battery must never come

into contact with water or other fluids

when it is open. Fluids can cause short-cir-

cuits, electric shocks and burns.

The high-voltage battery must only be re-

placed by a qualified workshop. Audi rec-

ommends that the work be carried out by

a registered Audi workshop, which has

trained workshop personnel and all the re-

quired tools and parts.





Electrolyte is extremely corrosive. Always

wear protective gloves and safety glasses.

First aid: If electrolyte comes into contact

with the eye, rinse the eye immediately

with fresh water for several minutes. Seek

medical assistance without delay. Neutral-

ise any electrolyte spilt on skin or clothing

immediately with soapy water and rinse

with plenty of fresh water. If electrolyte is

drunk by accident, seek the assistance of a

doctor immediately.

 ^{Always wear safety glasses.}

WARNING

Any work on the batteries must always be car-

ried out by a qualified workshop.



332

Checking and topping up fluids

Please read the safety information ðpage 320,

– Any gases escaping from batteries may be

toxic or flammable.

General information, ð

in General informa-

tion on batteries on page 331 and ð

.

– The substances contained in batteries can

be corrosive. If the contents of the battery

come into contact with your skin, rinse the

affected area with clean water for at least

15 minutes and then wash with soap. Have

the affected area examined by a doctor.

Important: Only use chargers with a maximum

charge voltage of 14.8 V (the battery cables do

not have to be disconnected).

The terminals for the charging cables are located

in the engine compartment. The earth point

always on the vehicle's body.

–

is

CAUTION

►

Applies to: mild hybrid drive

Switch off all electrical equipment and the igni-

tion.

Open the bonnet ðpage 322.

Press the release lever on the positive terminal

and fold open the cover ðFig. 205.

Follow the correct procedure for connecting the

charger cables to the jump-start terminals

(hexagon terminal under cap + , earth point on

body – ).

– To prevent damage, e.g. due to power surg-

es, components must not be connected to

the 48-volt battery terminals and wires.

– Maintenance work must always be carried

out by qualified personnel.

►

– The 48-volt lithium-ion battery must only

be replaced by a qualified workshop. Audi

recommends that the work be carried out by

a registered Audi workshop, which has

trained workshop personnel and all the re-

quired tools and parts.

►

Connect the battery charger to the mains and

switch it on.

Keep the bonnet fully open while charging

ð

.

– Never attempt to replace the 48-volt lithi-

um-ion battery yourself. The 48-volt lithi-

um-ion battery in this vehicle must only be

replaced with a 48-volt lithium-ion battery

from Audi which is supplied explicitly for

this vehicle. The use of other 48-volt lithi-

um-ion or lead-acid batteries can cause sub-

stantial faults and even the total failure of

the electrical system.

After charging the battery: switch off the bat-

tery charger and disconnect the mains cable.

Now disconnect the charger cables.

Close the cap on the positive terminal.

Close the bonnet ðpage 322.

►

WARNING

– Never use unsuitable charging equipment or

charging equipment which is visibly dam-

aged and/or dirty. Always check the charg-

ing equipment for damage before use.

– Charging cables or jump leads must never

be connected directly to the 12-volt battery

on your vehicle. Always use the terminals in

the engine compartment ðpage 333.

– A highly explosive mixture of gases may be

given off when the battery is under charge.

Only charge the battery in a well ventilated

area.

– Never make modifications to the lithium-ion

battery.

– Never open the 48-volt lithium-ion battery.

Charging the 12-volt vehicle battery

– When it is discharged the battery can freeze

at temperatures around 0 °C. You must not

use a battery which has frozen, even after it

has thawed, because the ice may have

cracked the battery casing and allowed the

Fig. 205 Engine compartment: Terminals for jump leads

or battery charger



333

Checking and topping up fluids

With the ignition switched off, top up the fluid

for the windscreen washer and headlight washer

system*.

electrolyte to escape – risk of explosion and

chemical burns! Please seek advice from a

qualified workshop.

– Leave the bonnet open while the 12-volt ve-

hicle battery is charging. Closing the bonnet

could cause an electrical short circuit – risk

of fire!

CAUTION

– The anti-freeze concentration must be

matched to the climate of the country in

which you are driving. If the concentration is

too high, damage to the car may result.

– Never put in radiator anti-freeze or other

additives.

Note

Important: Before you charge the battery

make sure you read the manufacturer's in-

structions for using the battery charger.

– Never use washer fluid which contains paint

thinners or solvents as it can damage the

paintwork.

Windscreen washer

system

Service interval display

The service interval display detects when the

next service is due for your vehicle.

There are two service interval display levels:

– Inspection or oil change reminder: After a cer-

tain mileage, a service reminder will appear in

the instrument cluster display each time the ig-

nition is switched on/off. The distance or time

remaining will be shown briefly.

Fig. 206 Engine compartment: Cap of windscreen washer

container

– Inspection or oil change due: When your vehi-

cle is due for an inspection, oil change or both,

the corresponding reminder Inspection due!,

Oil change due! or Oil change and inspection

due! will appear briefly after you switch the ig-

nition on/off.

Please refer to the safety information

ðpage 320, General information.

The container for the windscreen washer  con-

tains the cleaning fluid for the windscreen/rear

window and the headlight washer system*

ðpage 323. For the container capacity, please

refer to ðpage 378.

Checking the service intervals

You can check the distance and time remaining

until the next oil change and next service inspec-

tion.

Clean water should be used when topping up. If

possible, use soft water to prevent scaling on the

washer jets. Always add washer fluid to the wa-

ter. In cold weather you should add anti-freeze to

the water to prevent it from freezing.

Applies to MMI: On the home screen, select CAR

> Settings & service > Service intervals.

Applies to: vehicles with flexible oil change service

You cannot check the service interval on a new ve-

hicle until it has been driven for about 500 km.

Driver messages

The following driver messages may appear, de-

pending on the equipment installed in your vehi-

cle:

Qualified workshops reset the service interval af-

ter the oil is changed. The distance to the next oil

change is initially displayed based on the driving

profile prior to the oil change. Your own personal

driving profile is used subsequently to calculate



Please add washer fluid



334

Checking and topping up fluids

the remaining distance. Frequent cold starts or

short trips place extra demands on the engine oil

with the result that the oil has to be changed

more often.

Resetting the display

Your qualified workshop resets the service inter-

val display after each service.

It is very important that you reset the oil change

display if you change the oil yourself. The next oil

change will be due after a fixed service interval.

Applies to MMI: To reset the display, select the

following on the home screen: CAR > Settings &

service > Service intervals.

WARNING

If you neglect to have the vehicle serviced

promptly at the specified intervals, or if the

scope of the servicing work is insufficient, this

can lead to a breakdown in road traffic result-

ing in a potential accident with serious injury.

CAUTION

– Do not reset the oil change interval display

unless you have changed the oil.

– Regular servicing of the vehicle not only

sustains its service life and preserves its val-

ue, but also helps to maintain operational

and road safety. Service work should there-

fore always be carried out according to the

Audi guidelines.

– Services must always be carried out prompt-

ly, even if the mileage is low.

– Audi is not responsible for damage to the

vehicle resulting from insufficient servicing

or a lack of availability of parts.

335

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

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