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

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):

Cap with release catch,

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

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 -> Cooling system for Your Audi Rs Q8 SUV First Generation (2020-2026)

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