Get Checking and Filling -> Brake fluid Guide for Audi S Q5 SUV Third Generation (2025-2026)

Checking and Filling

Coolant additive

Cooling system

The coolant additive is made of anti-freezing and

corrosion protection agents. Only add the follow-

ing coolant additives mixed with distilled water.

Coolant

The engine cooling system is filled with a mixture

of purified water and coolant additive at the fac-

tory. This coolant must not be not changed.

Coolant additive

G12evo

Specification

TL 774 L

The coolant level is monitored using the  indi-

cator light. However, you should occasionally

check the coolant level.

The amount of coolant additive that needs to be

mixed with water depends on the climate where

the vehicle will be operated. If the coolant addi-

tive percentage is too low, the coolant can freeze

and damage the engine.

Messages

The following messages may appear, depending

on the vehicle equipment:

Coolant

additive

Freeze protec-

tion

 Turn off engine and check coolant level. See

owner's manual

Warm

regions

min. 40%

max. 45%

min. -13 °F

(-25 °C)

The coolant level is too low.

Cold

regions

min. 50%

max. 55%

max. -40 °F

(-40 °C)

Do not continue driving and turn off the ignition.

Check the coolant level ðpage 259.

Note

– If the coolant level is too low, add coolant

ðpage 259. Only continue driving once the in-

dicator light turns off.

– Before the start of winter, have an author-

ized Audi dealer or authorized Audi Service

Facility check if the coolant additive in your

vehicle matches the percentage appropriate

for the climate. This is especially important

when driving in colder climates.

 Coolant temperature: too high. Please let

engine run while vehicle is stationary

Let the engine run at idle for a few minutes to

cool off, until the indicator light turns off.

– If the G12evo coolant additive is not availa-

ble in an emergency, do not add any other

additive. You could damage the engine. If

this happens, only use distilled water and

restore the correct mixture ratio with the

specified coolant additive as soon as possi-

ble.

– If the indicator light does not turn off, do not

continue driving the vehicle. See an authorized

Audi dealer or authorized Audi Service Facility

for assistance.

 Coolant system: malfunction! Please turn

off engine

– Only refill with new coolant.

Do not continue driving, shut off the engine, and

turn off the ignition. See an authorized Audi deal-

er or authorized Audi Service Facility for assis-

tance.

– Radiator sealant must not be mixed with

the coolant.

– You can continue driving if the permitted

G12evo coolant additive was not added.

However, go to an authorized Audi dealer or

authorized Audi Service Facility immediately

to have the coolant replaced to reduce the

risk of engine damage.

Applies to: vehicles with plug-in hybrid drive



Electric drive system: malfunction! Cooling

system. Please contact Service

There is a malfunction in the cooling system.

Drive to an authorized Audi dealer or authorized

Audi Service Facility immediately to have the

malfunction corrected.

– Due to the risk of engine damage, the cool-

ing system should only be refilled by an au-

thorized Audi dealer or authorized Audi

Service Facility. An authorized Audi dealer or



258

Checking and Filling

►

authorized Audi Service Facility can also pro-

vide you with important information about

the recommended coolant additive.

Plug-in hybrid drive: If coolant is missing from

the high-voltage system coolant expansion

tank, do not continue driving. Contact an au-

thorized Audi dealer or authorized Audi Service

Facility immediately ð

Checking coolant

Adding coolant

Applies to: coolant expansion tank for combustion engine

Requirement: there must be some coolant re-

maining in the expansion tank for the combus-

tion engine ð

If you must add coolant, use a mixture of distilled

water and the specified coolant additive. Only

use non-distilled water in emergency situations.

Always use clean water only.

Fig. 171 Engine compartment - coolant expansion tank

►

Allow the engine to cool.

(diagram):

cover with release button;

coolant expan-

sion tank markings

►

Place a large, thick towel on the coolant expan-

sion tank cap.

Push the release button 1 ðfig. 171 on the

cap and carefully turn it to the left until you

Observe the safety precautions ðpage 250, Gen-

eral information.

►

feel resistance ð

Push the release button again and remove the

cap completely.

Add coolant mixed in the correct ratio

ðpage 258 up to the MAX marking.

Make sure that the fluid level remains stable.

Add more coolant if necessary.

Turn the cap to the right to tighten it until you

feel resistance a second time.

Applies to: vehicles with plug-in hybrid drive:

Your vehicle has two coolant expansion tanks

that are separate from each other ðpage 253,

fig. 168. One expansion tank for the combustion

engine and one tank for the high-voltage system.

The coolant expansion tank for the high-voltage

system is sealed and must not be opened ð

►

and ð

Checking the coolant level

►

WARNING

Park the vehicle on a level surface.

►

Turn off the ignition.

Open the hood ðpage 252.

Check the coolant level in the coolant expan-

sion tank ðpage 253, fig. 168 using the outer

markings 2 ðfig. 171. The coolant level must

be between the markings 2 when the engine is

cold. When the engine is warm it can be slight-

ly above the upper marking.

– The engine/motor compartment in any vehi-

cle is a potentially dangerous area. Shut off

the engine, turn off the ignition, and allow

the engine to cool before working in the en-

gine compartment. Always follow the infor-

mation found in ðpage 250, General infor-

mation.

►

– Never open the hood if you can see or hear

steam or coolant escaping from the engine

compartment. This increases the risk of

burns. The cooling system is under pressure.

When you no longer see or hear steam or

coolant escaping, you may open the engine

compartment with caution.

►

Conventional drive system: If you add coolant

to the expansion tank, please refer to

ðpage 258, Cooling system and ðpage 259,

Adding coolant.

►

Plug-in hybrid drive: If you add coolant to the

coolant expansion tank for the combustion en-

gine, see ðpage 258, Cooling system and

ðpage 259, Adding coolant.

– When working in the engine compartment,

remember that the radiator fan can turn on



259

Checking and Filling -> Brake fluid for Your Audi S Q5 SUV Third Generation (2025-2026)

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