Get Checking and Filling Guide for Audi Q8 SUV First Generation (2018-2026)

Checking and Filling

Fuel

Note

– Filling the tank just one time with leaded

fuel or other metallic additives will cause

permanent deterioration to the catalytic

converter function.

Types of gasoline

The correct gasoline grade is stated on the inside

of the fuel filler door.

– When gasoline with an octane rating that is

too low is used, high speeds or heavy engine

load can lead to engine damage.

The vehicle is equipped with a catalytic converter

and must only be driven with unleaded gasoline.

Tips

Audi recommends using TOP TIER Detergent Gas-

oline. For additional information on TOP TIER De-

The vehicle may be filled with fuel that has a

higher octane rating than what is required by

the engine.

The individual gasoline grades are differentiated

by octane ratings. This value is given with

(R+M)/2 equating to AKI or in RON.

Gasoline mixture

Gasoline with alcohol (ethanol)

The headings below match the sticker in the fuel

filler door (examples):

You can fuel your vehicle with unleaded gasoline

that has an ethanol content of up to 15%, for ex-

ample “E15”.

UNLEADED FUEL ONLY MIN. (R+M)/2 87

Regular / MIN. RON 91 Regular

Gasoline adapted to the season

Use regular gasoline with minimum 87 AKI /

91 RON ð

.

Many gasoline fuels are adapted to the seasons.

When the season changes, refueling at high-traf-

fic gas stations is recommended. It is more likely

that the gasoline will be suitable for the season

there.

Audi recommends using premium gasoline with

minimum 91 AKI / 95 RON to achieve the rated

horsepower and torque.

UNLEADED FUEL ONLY PREMIUM MIN.

(R+M)/2 91 / SUPER MIN. RON 95

Note

Using premium gasoline with minimum 91 AKI /

95 RON is recommended.

– Do not use gasoline that does not meet the

specifications.

– Ethanol fuels with a high ethanol percent-

age, such as E30 – E100, must not be used.

The fuel system will be damaged!

– Methanol fuels with a high methanol per-

centage, such as M5 – M100, must not be

used. The fuel system and the engine will be

damaged!

If premium gasoline is not available, you can also

use regular gasoline 87 AKI / 91 RON. However

this does reduce the engine power slightly.

UNLEADED FUEL ONLY PREMIUM MIN.

(R+M)/2 93 / SUPER PLUS MIN. RON 98

Using premium plus gasoline with at least 93

AKI / 98 RON is recommended.

– If you are unable to find out if a specific gas-

oline mixture meets the specifications, ask

the gas station operator or their fuel suppli-

er.

If no premium plus gasoline is available, you can

also use premium gasoline with 91 AKI / 95 RON.

However this does reduce the engine power

slightly.

– Do not use any gasoline mixture whose

composition cannot be identified.

– Audi does not assume any responsibility for

damage to the fuel system or for perform-

ance problems caused by using gasoline



252

Checking and Filling

mixtures different from those specified.

This type of damage also does not fall under

the New Vehicle Limited Warranty or under

the emissions control system warranty.

– If you notice a higher fuel consumption or

poor handling or performance problems due

to such gasoline mixtures, Audi recom-

mends fueling with unblended gasoline.

There is a malfunction in the fuel tank system.

Drive to an authorized Audi dealer or authorized

Audi Service Facility immediately to have the

malfunction corrected.

Fueling detected. Reset mi (km) now?

Select Yes if you would like to reset the trip od-

ometer.

The message appears in the instrument cluster

depending on the fuel level in the tank and the

amount of fuel added.

Gasoline additives

An important issue for many automobile manu-

facturers is combustion residue in the engine

that results from the use of certain fuels.

Fueling procedure

Although types of gasoline differ depending on

the manufacturer, there are similarities. Certain

substances in the gasoline may cause deposits in

the engine. Additives in the gasoline that should

keep the engine and fuel system clean do not all

function equally.

Audi recommends using TOP TIER Detergent Gas-

oline. For additional information on TOP TIER De-

Fig. 158 Right rear side of the vehicle: opening the fuel

filler door

If you use incorrect fuels over a long period of

time, the maximum engine performance may be

impaired by combustion residue.

Note

– Damage or malfunctions caused by the use

of incorrect types of gasoline are not cov-

ered by the New Vehicle Limited Warranty.

– Only gasoline additives that have been ap-

proved by Audi may be used.

Fig. 159 Fuel filler door with attached fuel cap

Refueling

The fuel filler door is unlocked or locked by the

central locking system.

Messages

►

The following messages may appear, depending

on the vehicle equipment:

Unlock the vehicle if necessary.

Press on the left side of the fuel filler door to

►

open it ðfig. 158.

Unscrew the tank cap counterclockwise.

Messages

►

If the  indicator light appears with a corre-

Place the cap from above on the open fuel filler

sponding message, refuel the vehicle.

door ðfig. 159.

►

Insert the fuel pump nozzle all the way into the

 Tank system: malfunction! Please contact

Service

fuel filler neck.

Begin fueling. Once the fuel pump nozzle turns

►

off the first time, the fuel tank is full. Do not



253

Checking and Filling

continue fueling, or else the expansion space in

the tank will be filled with fuel.

After the fuel pump has turned off, wait five

seconds before removing the nozzle to allow

the rest of the fuel to finish dripping into the

fuel tank.

WARNING

Audi does not recommend transporting fuel

containers inside the vehicle. Fuel could leak

out of the container and ignite, especially dur-

ing an accident. This can cause explosions,

fires, and injuries.

►

Turn the fuel cap clockwise until it clicks into

– If you must transport fuel in a fuel contain-

er, note the following:

place.

►

Close the fuel filler door and then press on the

– Always place the fuel container on the

ground before filling. Never fill the fuel

container with fuel while it is inside or on

the vehicle. Electrostatic discharge can oc-

cur while refueling and the fuel vapors

could ignite.

left side until it latches.

The correct fuel type for your vehicle can be

found on a label located on the inside of the fuel

filler door. For additional information on fuel, see

ðpage 252.

– When using fuel containers made of met-

al, the fuel pump nozzle must always re-

main in contact with the container to re-

duce the risk of static charge.

For the tank capacity in your vehicle, refer to the

Technical Data ðpage 328.

To reduce the risk of fuel leaking out or vapors

escaping, make sure that the fuel tank is closed

¹⁾

– Insert the fuel pump nozzle as far as possi-

ble into the filler opening while refueling.

– Follow the applicable legal regulations in

the country where you are driving when

using, storing and transporting fuel con-

tainers.

correctly. Otherwise the

turn on.

indicator light will

WARNING

Improper fueling procedures and improper

handling of fuel can result in explosions, fires,

severe burns, and other injuries.

– Make sure that the fuel container meets

the industry standards, for example ANSI

or ASTM F852-86.

– Do not smoke. Keep away from open flames.

– The ignition must be turned off when refuel-

ing.

Note

– Mobile devices, radio devices, and other ra-

dio equipment should always be turned off

when refueling. Electromagnetic rays could

cause sparks and start a fire.

– Remove fuel that has overflowed onto any

vehicle components immediately to reduce

the risk of damage to the vehicle.

– Never drive until the fuel tank is completely

empty. The irregular supply of fuel that re-

sults from that can cause engine misfires.

Uncombusted fuel may enter the exhaust

system and increase the risk of damage to

the catalytic converter.

– If you do not insert the fuel pump nozzle all

the way into the filler tube, then fuel can

leak out. Spilled fuel can ignite and start a

fire.

– Never get into the vehicle when refueling. If

there is an exceptional situation where you

must enter the vehicle, close the door and

touch a metal surface before touching the

fuel pump nozzle again. This will reduce the

risk of electrostatic discharge that can cause

flying sparks. Sparks can start a fire when

refueling.

For the sake of the environment

– Do not overfill the fuel tank, or fuel could

leak out when the vehicle is warming up.

– Fuel should never enter the sewer system or

come into contact with the ground.



1)

Depending on the engine and country

254

Checking and Filling

cause overheating and damage to the catalytic

converter.

Tips

The fuel filler door on your vehicle does not

lock if you lock the vehicle from the inside us-

ing the central locking switch.

Malfunction Indicator Lamp (MIL)



If the

indicator light blinks or turns on, there

is a malfunction related to emissions which can,

for example, cause poor emissions quality and

damage to the catalytic converter. Drive slowly to

an authorized Audi dealer or authorized Audi

Service Facility to have the malfunction correct-

ed.

Manually releasing the fuel filler door

►

See an authorized Audi dealer or authorized

Audi Service Facility if you cannot open the fuel

filler door.

►

Afterward, drive to an authorized Audi dealer or

authorized Audi Service Facility to have the

malfunction corrected.

The indicator light can also turn on if the fuel fill-

1)

er cap is not closed correctly ðpage 253

.

Emissions control

system

Engine compartment

General information

Special care is required if you are working in the

engine compartment

WARNING

The temperature of the exhaust system is

high, both when driving and after stopping

the engine.

For work in the engine compartment, such as

checking and filling fluids, there is a risk of in-

jury, scalding, accidents, and burns. For this

reason, follow all the warnings and general

safety precautions provided in the following in-

formation. The vehicle's engine compartment is

– Never touch the exhaust tail pipes once they

have become hot. This could result in burns.

– Do not park your vehicle over flammable

materials such as grass or leaves because

the high temperature of the emissions sys-

tem could start a fire.

a dangerous area. ð

.

Explanation of warning symbols:

Observe all warnings - there is a risk for

injury!

– Do not apply underbody protectant in the

exhaust system area, because this increases

the risk of fire.



Hot engine components!



Rotating parts!

Catalytic converter

The radiator fan can turn on at any time!

.

Observe the safety precautions ðpage 255, Gen-

eral information.

High voltage! The voltage level compo-

nents, such as the high-voltage system,

ignition system, or the belt alternator

starter, carry can cause fatal injuries.

Touching damaged live components can

result in a fatal electric shock.

The vehicle may only be driven with unleaded

gasoline, or the catalytic converter will be de-

stroyed.



Never drive until the tank is completely empty.

The irregular supply of fuel that results from that

can cause engine misfires. Uncombusted fuel

could enter the exhaust system, which could

High voltage! Turn off the engine before

coming into contact with any ignition

system components!





1)

Depending on the engine and country

255

Checking and Filling

The catalytic converter can be damaged

if the oil level is too high!

be burned. Wait until no steam or coolant is

escaping.





– The cap on the coolant expansion tank must

never be opened when the coolant is hot.

The cooling system is under pressure. There

is a risk of burns

Hot coolant - there is a risk of scalding!

Always follow the instructions in the

Owner’s Manual.



– To protect your face, hands, and arms from

hot steam or coolant, cover the cap with a

thick cloth when opening.

WARNING

The engine/motor compartment in any motor

vehicle is a potentially dangerous area and

can cause serious personal injury.

– Do not remove the engine cover under any

circumstances. This increases the risk of

burns.

– Always use extreme caution when doing any

work in the engine compartment. Always

follow commonly accepted safety practices

and use common sense. Never risk personal

injury.

– Due to the risk of electric shock, never touch

the ignition cable or other components in

the electronic high-voltage ignition system

when the engine is running or is starting.

– If a position is selected while the vehicle is

stationary and the engine is running, do not

press the accelerator pedal inadvertently.

Pressing the accelerator pedal will cause the

vehicle to move, and this could result in an

accident.

– Never perform any work in the engine com-

partment unless you know exactly how to

carry out the job and have the correct tech-

nical information and the correct tools.

– If you are uncertain about what to do, have

the work performed by an authorized Audi

dealer, an authorized Audi Service Facility,

or another qualified workshop. Serious per-

sonal injury may result from work that is not

performed correctly.

– If inspections or repairs must be performed

while the engine is running, moving compo-

nents (such as the ribbed belt, generator,

and radiator fan) pose an additional risk.

– Set the parking brake first and select the

“P” (Park) position.

WARNING

– Always make sure that no parts of the

body, jewelry, ties, loose clothing, and

long hair can be caught in moving engine

components. Before any work, always re-

move any jewelry and/or ties, tie back long

hair, and make sure all clothing fits close

to the body to reduce the risk of anything

becoming caught in engine components.

– Pay attention to the following warnings list-

ed when work on the fuel system or on the

electrical equipment is required.

– Turn off the engine.

– Turn off the ignition.

– Set the parking brake.

– Select the “P” (Park) position.

– Allow the engine to cool.

– Keep children away from the engine com-

partment.

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

ids (such as the freeze protection contained

in the coolant) can catch fire.

– Avoid short circuits in the electrical system.

– Never reach into the radiator fan. The fan is

temperature-controlled and can turn on

suddenly, even when the ignition is turned

off.

– Do not smoke.

– Never work near open flames.

– Always have a working fire extinguisher

nearby.

– All work on the battery or electrical system

in your vehicle can result in injuries, chemi-

cal burns, accidents, or burns. Because of

this, all work must be performed only by an

– Never open the hood when there is steam or

coolant escaping from the engine compart-

ment, because there is a risk that you could



256

Checking and Filling

Opening and closing the hood

authorized Audi dealer or authorized Audi

Service Facility.

The hood is released from inside the vehicle.

– Limit your exposure to exhaust and chemi-

cals to as short a time as possible.

WARNING

California Proposition 65 Warning:

– Engine exhaust, some of its constituents,

and certain vehicle components contain or

emit chemicals known to the State of Cali-

fornia to cause cancer and birth defects and

reproductive harm. In addition, certain flu-

ids contained in vehicles and certain prod-

ucts of component wear contain or emit

chemicals known to the State of California

to cause cancer and birth defects or other

reproductive harm.

Fig. 160 Footwell: release lever

– Battery posts, terminals and related acces-

sories contain lead and lead compounds,

chemicals known to the State of California

to cause cancer and reproductive harms.

Wash hands after handling.

Fig. 161 Unlocked hood: lever

Note

Observe the safety precautions ðpage 255, Gen-

eral information.

When filling fluids, be sure not to add any flu-

ids to the wrong reservoirs. Otherwise severe

malfunctions and engine damage will occur.

Make sure the wiper arms are not raised up from

the windshield. Otherwise the paint could be

damaged.

For the sake of the environment

You should regularly check the ground under

your vehicle in order to detect leaks quickly. If

there are visible spots from oil or other fluids,

bring your vehicle to an authorized Audi deal-

er or authorized Audi Service Facility to be

checked.

Opening the hood

1)

►

With the door open, pull the lever  below

the instrument panel in the direction of the ar-

row ðfig. 160.

►

Raise the hood slightly ð

.

►

Press the lever ðfig. 161 in the direction of the

arrow. This releases the hooks.

Open the hood.

►

Closing the hood

►

Push the hood down until you override the

force of the strut.

►

Let the hood fall lightly into the latch. Do not

press it in. ð

.



1)

The  symbol is not available in all countries.

257

Checking and Filling

Messages

be burned. Wait until no steam or coolant is

escaping.

The following messages may appear, depending

on the vehicle equipment:

– For safety reasons, the hood must always be

latched securely while driving. Because of

this, always check the hood after closing it

to make sure it is latched correctly. The

hood is latched if the front corners cannot

be lifted.



Warning! Hood is not locked. Stop vehicle

and check the lock

The hood latch is not locked correctly. Stop im-

mediately and close the hood.

– If you notice that the hood is not latched

while you are driving, stop immediately and

close it, because driving when the hood is

not latched increases the risk of an accident.

WARNING

– Never open the hood when there is steam or

coolant escaping from the engine compart-

ment, because there is a risk that you could

Engine compartment overview

The most important check points.

Fig. 162 Engine compartment overview: diagram

Observe the safety precautions ðpage 255, Gen-

eral information.

2

Coolant expansion tank () ðpage 264

3

Engine oil filler opening () ðpage 260,

Checking the engine oil level

1

Jump start point (+) under a cover, (-) with

hex head screw ðpage 269, Charging the 12

volt vehicle battery ðpage 310, Jump start-

ing

4

Sticker for engine oil specifications

ðpage 259



258

Checking and Filling

5

6

Brake fluid reservoir () under a cover

ðpage 265

engine oils which do not meet these quality

standards can cause damage to the engine. As

an exception and only in an emergency, 0.5 qt

(0.5 l) of engine oil that differs from the

standards listed may be used.

Washer fluid reservoir () ðpage 270

The engine oil filler opening may be located in a

different area depending on the specific engine.

Tips

Engine oil

Audi recommends using engine oils provided

by Audi Genuine Parts.

If the engine oil level is too low

Messages

The following messages may appear, depending

on the vehicle equipment:



Turn off engine. Oil pressure too low

Stop driving and turn off the engine. Check the

engine oil level ðpage 260.

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

ðpage 261. Only continue driving once the in-

dicator light turns off.

Fig. 163 Engine oil sticker

–

1 Engine oil viscosity

2 Engine oil standard

– If the engine oil level is correct and the indica-

tor light still turns on, turn the engine off and

do not continue driving. See an authorized Audi

dealer or authorized Audi Service Facility for as-

sistance.

If you need to add engine oil, use an oil that

meets the engine oil standard listed on the stick-

er ðfig. 163. The sticker with the specified

standard is located in the front of the engine

compartment ðpage 258, fig. 162. When using

the specified engine oil, you can adjust the oil

level as often as needed.



Please add oil immediately

Stop driving and turn off the engine. Check the

engine oil level ðpage 260 and add engine oil

immediately ðpage 261.

If engine oil that meets the recommended speci-

fication is not available, in an emergency you

may add a maximum of 0.5 quart (0.5 liter) en-

gine oil of the that meets the following different

standard one time until the next regular oil

change.



Add max. x qt (x l) oil. You can continue

driving

Add the amount of oil shown immediately

ðpage 261.



Please reduce oil level

– Standard VW 504 00, ACEA C3, ACEA C4,

API SP or ILSAC GF-6A. All viscosity classes

within these standards are permitted.

There is too much oil in the engine and there is a

risk of damaging the catalytic converter or en-

gine. Drive to an authorized Audi dealer or au-

thorized Audi Service Facility immediately to have

engine oil extracted if necessary. Avoid high en-

gine speeds, full acceleration, and heavy engine

loads.

Audi recommends having the oil changed by an

authorized Audi dealer or authorized Audi Service

Facility.

Note



Oil level sensor: oil change necessary. Please

Audi recommends using approved engine oil

that meets the respective VW standard. Using

contact Service



259

Checking and Filling

Fuel has entered the engine oil. This will cause

the engine oil level to rise slowly and the engine

oil quality to decrease. Do not extract engine oil

to reduce the level, because this will increase the

risk of engine damage. Drive to an authorized

Audi dealer or authorized Audi Service Facility im-

mediately to have engine oil extracted.

Tips



The oil pressure warning

indicator. Always check the oil level regularly.

is not an oil level

Checking the engine oil level

The engine oil level can be checked in the MMI.



Oil level system: malfunction! Please con-

Observe the safety precautions ðpage 255, Gen-

eral information.

tact Service

The sensor that checks the engine oil level has

malfunctioned. Drive immediately to an author-

ized Audi dealer or authorized Audi Service Facili-

ty to have the malfunction corrected.

►

Park the vehicle on a level surface.

►

Shut the engine off when it is warm.

►

Turn only the ignition on again.

►

Wait approximately five minutes so that the en-



Oil pressure sensor: malfunction! Please

gine oil can flow back into the engine oil pan.

contact Service

►

Applies to MMI: Select on the home screen: VE-

HICLE > Settings & Service > Oil level.

Read the oil level in the display. Add engine oil

if the bar in the oil level indicator is just below

“min” ðpage 261.

The sensor that checks the engine oil pressure

has malfunctioned. Drive immediately to an au-

thorized Audi dealer or authorized Audi Service

Facility to have the malfunction corrected.

►



Please drive to warm up engine

Note

Especially low outside temperatures are a main

reason why fuel may get into the engine oil. The

fuel can only evaporate from the engine oil if the

engine oil temperature is high enough.

If the engine oil level is too low or too high,

there is a risk of engine damage.

Tips

The oil level indicator in the display is only an

informational display. If the oil level is too

low, a minimum oil warning appears in the in-

strument cluster. Add oil and close the hood.

The current oil level will be displayed on the

MMI the next time the ignition is turned on.

Drive in the “S” position.

Drive the engine at higher RPMs while avoiding

full acceleration.

You should drive for at least 30 minutes. The in-

dicator light may not turn off during this time.

Repeat the steps that are described at any time.

Tips

Have an authorized Audi dealer or authorized

Audi Service Facility repair the malfunction if the

indicator light does not turn off after a few

drives.

The engine oil consumption may be up to

0.5 quart/600 miles (0.5 liter/1,000 km), de-

pending on driving style and operating condi-

tions. In RS models, the oil consumption may

be up to 0.8 qt/600 mi (0.8 L/1,000 km).

Consumption may be higher during the first

3,000 miles (5,000 km). The engine oil level

must be checked regularly. It is best to check

each time you refuel your vehicle and before

long drives.

WARNING

When the message  Please drive to warm

up engine appears, adjust your speed accord-

ing to the weather, road, terrain, and traffic

conditions. You should never disobey the traf-

fic laws applicable in the country in which you

are driving in order to follow driving recom-

mendations.

– Because of the lubrication and cooling of

the engine, combustion engines consume

oil. The oil consumption varies depending



260

Checking and Filling

on the engine and may change during the

service life of the engine. Engines generally

consume more oil at the beginning during

the break-in period. Then oil consumption

stabilizes after the break-in period.

Adding engine oil

– Under normal conditions, oil consumption

depends on the quality and viscosity of the

oil, the engine RPM, the climate conditions,

and the road conditions. The dilution of oil

from condensation or fuel residue as well as

the age of the oil also play a role. Because

engine wear increases with mileage, oil con-

sumption will increase again over time until

it may be necessary to replace worn compo-

nents.

Fig. 164 Engine compartment: engine oil filling opening

cover (example)

Observe the safety precautions ðpage 255, Gen-

eral information.

– Because all these variables play a role, it is

not possible to define an oil consumption

standard. Therefore, the oil level must be

checked regularly.

►

Turn off the engine.

►

Open the hood ðpage 257.

►

Unscrew the cap  for the engine oil filler

opening ðfig. 164.

Carefully add 0.5 quart (0.5 liter) of the correct

oil ðpage 259.

Close the engine oil filler opening cap.

Close the hood ðpage 257.

Restart the ignition after two minutes and read

the current oil level in the MMI ðpage 260,

Checking the engine oil level.

Applies to: using engine oil that meets the rec-

– If you believe that your engine has increased

its oil consumption, contact an authorized

Audi dealer or authorized Audi Service Fa-

cility to determine the cause. Please note

that an exact oil consumption measurement

must be done with the necessary care and

accuracy and may take time. An authorized

Audi dealer or authorized Audi Service Fa-

cility is trained in accurately measuring the

oil consumption.

►

ommended specification: Add some more en-

gine oil again if necessary.

– You can find information on engine oil and

engine oil capacities for the USA at

or for Can-

customer-area/care-and-maintenance/

, or call

800-822-2834.

WARNING

– When adding oil, do not let oil drip onto hot

engine components. This increases the risk

of a fire.

– You must close the cap on the oil filler open-

ing correctly so that oil does not leak out on-

to the hot engine and exhaust system when

the engine is running, because this is a fire

hazard.

– Always clean skin thoroughly if it comes into

contact with engine oil.

– Engine oil is poisonous and must be kept out

of reach of children.

– Store the engine oil securely in the original

container.



261

Checking and Filling

If you change the engine oil yourself, please note

the following important information:

Note

– Only use high-grade engine oil that explicit-

ly meets the Audi oil quality standard for

your vehicle. Using another oil may cause

severe vehicle damage.

WARNING

If you change the engine oil on the vehicle

yourself, the following precautions must be

followed:

– Do not mix any additives with the engine oil.

Additives may cause engine damage that is

not covered by your New Vehicle Limited

Warranty.

– Wear protective eyewear.

– Due to the risk of scalding, allow the engine

to cool down sufficiently.

– Maintain enough distance when you are re-

moving the oil drain plug. While doing this,

keep your forearm parallel to the ground to

reduce the risk of hot oil dripping down your

arm.

For the sake of the environment

– Oil should never enter the sewer system or

come into contact with the ground.

– Follow the legal regulations in the country

where you are located when disposing of

empty oil containers.

– Drain the oil into a container designed for

this purpose that is large enough to hold the

full amount of oil in your engine.

– Engine oil is poisonous. Always store out of

reach of children.

Changing engine oil

Audi recommends having the oil changed at an

authorized Audi dealer or authorized Audi Serv-

ice Facility.

– Prolonged contact of used engine oil with

the skin may cause skin damage. Always

wash oil off immediately with soap and wa-

ter to protect your skin.

Observe the safety precautions ðpage 255, Gen-

eral information.

Note

The engine oil must be changed at the intervals

specified in the Warranty & Maintenance Book-

let. This is very important because the lubrication

function of the oil gradually declines during regu-

lar vehicle operation.

Do not mix any additives with the engine oil.

Additives may cause engine damage that is

not covered by your New Vehicle Limited War-

ranty.

The engine oil should be changed more frequent-

ly under certain circumstances. Have the oil

changed more frequently if you often drive short

distances, your vehicle is predominantly in stop-

and-go traffic situations, is in very dusty environ-

ments, or is operated for long periods of time in

temperatures below zero.

For the sake of the environment

– Before changing the engine oil, make sure

you can dispose of the used engine oil cor-

rectly.

– Engine oil must always be disposed of cor-

rectly. Do not dump it in the yard, in the for-

est, or in open water, river channels, or sew-

ers.

Cleansing additives in the oil make fresh oil ap-

pear darker after the engine has run briefly. This

is normal and no reason to change the engine oil

more frequently than recommended.

– Have your used engine oil recycled by bring-

ing it to a used oil collection site or contact

a gas station.

Because correctly disposing of engine oil is diffi-

cult and special tools and technical knowledge

are needed for an oil change, Audi recommends

having your engine oil changed by an authorized

Audi dealer or authorized Audi Service Facility.

262

Checking and Filling

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.

Cooling system

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

Freeze protec-

tion

The coolant level is monitored using the  indi-

cator light. However, you should occasionally

check the coolant level.

Warm

regions

min. 40%

max. 45%

min. -13 °F

(-25 °C)

Cold

regions

min. 50%

max. 55%

max. -40 °F

(-40 °C)

Messages

The following messages may appear, depending

on the vehicle equipment:

Note

– 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.

 Turn off engine and check coolant level. See

owner's manual

The coolant level is too low.

Do not continue driving and turn off the ignition.

Check the coolant level ðpage 264.

– 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 coolant level is too low, add coolant

ðpage 264. Only continue driving once the in-

dicator light turns off.

 Coolant temperature: too high. 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.

– Only refill with new coolant.

– Radiator sealant must not be mixed with

the coolant.

– 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.

– 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.

 Coolant system: malfunction! Please turn

off engine

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.

– 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

authorized Audi Service Facility can also pro-

vide you with important information about

the recommended coolant additive.

Coolant additive

The coolant additive is made of anti-freezing and

corrosion protection agents. Only add the follow-

ing coolant additives mixed with distilled water.

Coolant additive

G12evo

Specification

TL 774 L

263

Checking and Filling

►

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.

Checking coolant

WARNING

– 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 255, General infor-

mation.

Fig. 165 Engine compartment - Coolant expansion tank

(diagram):

1

cover with release button;

2

markings

– 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.

Observe the safety precautions ðpage 255, Gen-

eral information.

Checking the coolant level

►

Park the vehicle on a level surface.

Turn off the ignition.

Open the hood ðpage 257.

Check the coolant level in the coolant expan-

sion tank ðpage 258, fig. 162 using the outer

markings 2 ðfig. 165. 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.

– When working in the engine compartment,

remember that the radiator fan can turn on

even if the ignition is turned off, which in-

creases the risk of injury.

– Coolant additive and coolant can be danger-

ous to your health. For this reason, store the

coolant in the original container and away

from children. There is a risk of poisoning.

►

When you add coolant to the expansion tank,

please refer to ðpage 263, Cooling system.

Adding coolant

Note

Requirement: there must be a residual amount of

Coolant loss that results in the coolant expan-

sion tank becoming nearly empty primarily in-

dicates that there are significant leaks in the

cooling system, which can lead to further

damage.

coolant in the expansion tank 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.

– Do not add coolant if the expansion tank is

empty. Air could enter the cooling system

and increase the risk of damage. If this is

the case, do not continue driving. See an au-

thorized Audi dealer or authorized Audi

Service Facility for assistance.

►

Allow the engine to cool.

►

Place a large, thick towel on the coolant expan-

sion tank cap.

►

Push the release button 1 ðfig. 165 on the

cap and carefully turn it to the left until you

– If there is any coolant remaining, add addi-

tional coolant. Drive to an authorized Audi

dealer or authorized Audi Service Facility

immediately to have the malfunction cor-

rected. If the  indicator light turns on

again, do not continue driving and turn off

the ignition. See an authorized Audi dealer

feel resistance ð

Push the release button again and remove the

cap completely.

Add coolant mixed in the correct ratio

ðpage 263 up to the MAX marking.

.

►



264

Checking and Filling

Messages

or authorized Audi Service Facility for assis-

tance.

The following messages may appear, depending

on the vehicle equipment:

– If there is too much coolant in the expan-

sion tank after adding coolant, drive to an

authorized Audi dealer or authorized Audi

Service Facility as soon as possible to have

the coolant level corrected.

 /  Brakes: stop vehicle and check brake

fluid level

Stop the vehicle and check the brake fluid level.

See an authorized Audi dealer or authorized Audi

Service Facility for assistance.

– Using non-distilled water increases the risk

of engine damage. Its chemical components

may cause significant corrosion damage in

the engine.

Changing the brake fluid

– If you had to add a large amount of non-dis-

tilled water (more than 0.5 liter), then im-

mediately drive to an authorized Audi dealer

or authorized Audi Service Facility to have

the coolant changed.

Brake fluid should be changed at regular inter-

vals. Have the brake fluid changed by an author-

ized Audi dealer or authorized Audi Service Facili-

ty. The authorized Audi dealer or authorized Audi

Service Facility will inform you of the replace-

ment intervals.

Brake fluid

WARNING

– If the brake fluid level is below the MIN

marking, it can impair the braking effect and

driving safety, which increases the risk of an

accident. Do not continue driving. See an au-

thorized Audi dealer or authorized Audi

Service Facility for assistance.

– If the brake fluid is old, bubbles may form in

the brake system during heavy braking. This

could impair braking performance and driv-

ing safety, which increases the risk of an ac-

cident.

Fig. 166 Engine compartment: cap on brake fluid reservoir

Observe the safety precautions ðpage 255, Gen-

eral information.

– The brake fluid in your vehicle must meet

the standard VW 501 14 and is available at

an authorized Audi dealer or authorized

Audi Service Facility. If this brake fluid is not

available, another high-grade brake fluid of

equivalent quality may be used, and it must

meet the U.S. Federal Motor Vehicle Stand-

ard (FMVSS) 116 DOT 4, Class 6.

Checking the brake fluid level

The brake fluid reservoir is located under a cover

on the driver’s side.

►

Park the vehicle on a level surface.

►

Slide the cover that is located below the wind-

shield wipers on the driver's side toward the

windshield and remove the cover.

Read the brake fluid level on the brake fluid

reservoir ðpage 258, fig. 162. The brake fluid

level must be between the MIN and MAX mark-

– Reusing brake fluid or using brake fluid that

is not permitted for your vehicle will signifi-

cantly impair the braking performance and

can even result in a failure of the brake sys-

tem. The manufacturer of the vehicle is not

liable for failures or damage resulting from

this. It will also not be covered by the war-

ranty.

►

ings ð

.

The brake fluid level is monitored automatically.



265

Checking and Filling

– If the message does not turn off, drive immedi-

ately to an authorized Audi dealer or authorized

Audi Service Facility to have the malfunction

corrected.

Note

– If the brake fluid level is above the MAX

marking, brake fluid may leak out over the

edge of the reservoir and result in damage

to the vehicle.

WARNING

– Do not allow any brake fluid to come into

contact with the vehicle paint, because it

will corrode the paint.

When there is an electrical system malfunc-

tion, vehicle functions may not work and driv-

ing stability may be limited, which increases

the risk of an accident. Do not continue driv-

ing and turn off the ignition. See an author-

ized Audi dealer or authorized Audi Service Fa-

cility for assistance.

Electrical system

The following messages may appear, depending

on the vehicle equipment:





If the

/

or

indicator light turns on,

Battery

there is a malfunction in the power supply, the

battery, or the vehicle electrical system.

Battery general information





/

Electrical system: malfunction! Safely

Because of the complex power supply, all work

on batteries such as disconnecting, replacing,

etc., should only be performed by an authorized

Audi dealer or authorized Audi Service Facility

stop vehicle

Safely stop your vehicle, do not continue driving,

and turn off the ignition ð . See an authorized

Audi dealer or authorized Audi Service Facility for

assistance.

ð

.

Multiple batteries with different technologies

may be installed in your vehicle:



Electrical system: malfunction! Restart not

possible. Please contact Service

– Vehicle battery (for example, for starting the

engine, basic power supply) ðpage 268, Safety

precautions

If you turn off the ignition, you will not be able to

restart the vehicle. Vehicle functions or driving

stability may be limited. Drive to an authorized

Audi dealer or authorized Audi Service Facility im-

mediately.

– Auxiliary battery (for example, for recuperation

or optional equipment) ðpage 268, Safety pre-

cautions

Not running the vehicle for long periods of

time



Electrical system: malfunction! Please con-

tact Service

The battery will gradually drain if the vehicle

does not run for long periods of time. To ensure

that the vehicle can still be started, the electrical

equipment will be limited or turned off. Some

convenience functions, such as interior lighting

or power seat adjustment, may not be available

under certain circumstances. The convenience

functions will be available again when you start

the engine.

Turn off all electrical equipment that is not need-

ed. If necessary, some equipment will be turned

off automatically. Vehicle functions or driving

stability may be limited. Drive to an authorized

Audi dealer or authorized Audi Service Facility im-

mediately.



Electrical system: low battery charge. Bat-

tery will be charged while driving

The starting ability may be impaired.

Even when electrical equipment is turned off, the

equipment can still drain the battery if the vehi-

cle is not driven for long periods of time. Deep

draining results in a chemical reaction that

– If this message turns off after a little while, the

vehicle battery has charged enough while driv-

ing.



266

Checking and Filling

destroys the inside of the battery. The battery

must be charged every month to prevent this

ðpage 269. Contact an authorized Audi dealer or

authorized Audi Service Facility for more infor-

mation.

Only an authorized Audi dealer or author-

ized Audi Service Facility has the necessary

technology to perform the adaption correct-

ly. Otherwise, there could be a loss of safe-

ty-related functions among other things,

which increases the risk of an accident.

– Using a 12 volt vehicle battery that does not

match the same specifications and dimen-

sions as the factory-installed 12 volt vehicle

battery can result in short circuits or cause a

fire. Serious injuries or death may result.

– Only use maintenance-free and leak-proof

12 volt vehicle batteries that match the

same specifications and dimensions as the

factory-installed 12 volt vehicle battery.

– Never connect a charging cable or jump

start cable directly to the 12 volt vehicle

battery. Only use the connections in the en-

gine compartment ðpage 269.

Winter operation

Cold weather places an especially high load on

the 12 volt vehicle battery. Have the battery

checked by an authorized Audi dealer or author-

ized Audi Service Facility before cold weather be-

gins.

Replacing the battery

Applies to: 12 volt vehicle battery

All work on the battery must only be performed

by an authorized Audi dealer or authorized Audi

Service Facility.

The 12 volt vehicle battery was developed based

on the installation location and is equipped with

safety features. If a 12 volt vehicle battery must

be replaced, ask an authorized Audi dealer or au-

thorized Audi Service Facility about the electro-

magnetic compatibility, size, and the necessary

maintenance, power, and safety standards for

the new 12 volt vehicle battery. The battery vent

on the 12 volt vehicle battery must always be on

the negative terminal side. The battery vent on

the positive terminal side must always be closed.

WARNING

California Proposition 65 Warning:

– Battery posts, terminals and related acces-

sories contain lead and lead compounds,

chemicals known to the State of California

to cause cancer and reproductive harms.

Wash hands after handling.

Note

When replacing the 12 volt lead-acid vehicle bat-

tery, only use a maintenance-free 12 volt lead-

acid battery that conforms to the TL 825 06 and

VW 7 50 73 standards. These standards must be

from October 2014 or newer.

– If the vehicle will be parked for long periods

of time, protect the 12 volt vehicle battery

against the cold so that it will not “freeze”

and become damaged ðpage 269, Charg-

ing the 12 volt vehicle battery.

– There are electrical components under the

cargo floor behind a trim panel that warm

up during operation. To reduce the risk of

the components overheating, do not store

objects such as blankets under the cargo

floor. If the components overheat, they will

turn off temporarily. This will be indicated

by a message that will be displayed in the

instrument cluster until the temperature re-

turns to normal.

WARNING

– All work on the battery or electrical system

in your vehicle can result in injuries, chemi-

cal burns, accidents, or burns. Because of

this, all work must be performed only by an

authorized Audi dealer or authorized Audi

Service Facility.

– Always have an authorized Audi dealer or

authorized Audi Service Facility replace the

12 volt vehicle battery, because an adapta-

tion must be performed on the vehicle elec-

trical system when the battery is replaced.

– Always have an authorized Audi dealer or

authorized Audi Service Facility replace the

12 volt vehicle battery, because an



267

Checking and Filling

adaptation must be performed on the vehi-

cle electrical system when the battery is re-

placed. Only an authorized Audi dealer or

authorized Audi Service Facility has the nec-

essary technology to perform the adaption

correctly.

Electrolyte fluid is highly corrosive. Always

wear protective gloves and eye protection.

First aid: if electrolyte fluid enters the

eyes, immediately flush with clean water

for several minutes. Seek medical atten-

tion immediately. Immediately neutralize

electrolyte fluid on the skin or clothing us-

ing a soap solution and rinse with plenty

of water. Seek medical attention immedi-

ately if electrolyte fluid is ingested.



– Using a vehicle battery that does not meet

the AUDI AG quality specifications or with a

capacity that is too low will void the vehi-

cle’s certification for use on public roads,

and this will void the vehicle registration

 ^{Always wear eye protection.}

ð

.

If electrolyte fluid enters the eyes, imme-

For the sake of the environment



diately flush with clean water for several

minutes. Seek medical attention immedi-

ately.

 Batteries and electrical/electronic devices

must be disposed of in an environmentally

safe manner ðpage 330, Disposal instruc-

tions.

Fire, sparks, open flame, and smoking are

prohibited. Avoid creating sparks and

short circuits when handling cables and

electrical devices.



Safety precautions

Always keep children away from battery

electrolyte fluid and the battery.

Explanation of warning symbols:



Observe all warnings - there is a risk for in-

A highly explosive mixture of gases can

form when charging batteries.



/ Always follow the instructions in the Own-

jury!





er’s Manual.

WARNING

12 volt vehicle battery. Energized compo-

nents. Improper handling can result in

short circuits ð in Battery general in-

formation on page 267.

All work on the batteries must only be per-

formed by an authorized Audi dealer or au-

thorized Audi Service Facility.



– Gases that escape from these batteries can

be poisonous or flammable.

With the exception of charging the 12 volt

vehicle battery and jump starting, all oth-

er procedures involving the 12 volt vehicle

battery must be performed by an author-

ized Audi dealer or authorized Audi Serv-

ice Facility ð in Battery general infor-

mation on page 267 ð in Battery gen-

eral information on page 267.

– The contents of these batteries can be corro-

sive. If any battery contents come into con-

tact with the skin, flush the affected area

with clean water for at least 15 minutes.

Then wash the affected area with soap. Have

the affected area examined by a medical

professional.



Note

Applies to: mild hybrid drive

– Components must not be connected to the

battery terminals and wires on the 48 volt

battery because this increases the risk of

damage, for example due to overvoltage.

– Have maintenance work performed only by

trained personnel.



268

Checking and Filling

►

– Have the 48 volt lithium battery replaced

only by an authorized Audi dealer or author-

ized Audi Service Facility. Audi recommends

an authorized Audi dealer or authorized

Audi Service Facility, because these loca-

tions have trained personnel and the re-

quired parts and tools.

Clamp the charger terminal clamps to the jump

start pins according to the instructions. (Hex

head bolt under a cover + , ground point on the

vehicle body – ).

Insert the power cable for the charger into the

socket and turn on the charger.

►

Keep the hood completely open during the

charging session ð

.

– Never try to replace the 48 volt lithium bat-

tery yourself. The 48 volt lithium battery in

this vehicle may only be replaced with a 48

volt lithium battery designed by Audi specif-

ically for this vehicle. Using other 48 volt

lithium or lead batteries will result in con-

siderable malfunctions or even total failure

of the electrical system.

At the end of the charging session, turn off the

charger and pull the power cable out of the

socket.

Remove the charger terminal clamps.

Close the cover on the positive terminal.

Close the hood ðpage 257.

►

– Never make modifications to the lithium

battery.

WARNING

– Never use charging equipment that is un-

suitable, visibly damaged, and/or dirty.

Check the charging equipment for damage

before every use.

– Never open the 48 volt battery.

Charging the 12 volt vehicle battery

– Never connect a charging cable or jump

start cable directly to the 12 volt vehicle

battery. Only use the connections in the en-

gine compartment ðpage 269.

– A highly explosive mixture of gases can form

when charging batteries. Only charge the

battery in well-ventilated areas.

– A drained battery can freeze at tempera-

tures around 32 °F (0 °C). Do not charge or

use a frozen or thawed battery. If ice forms,

the battery housing can crack and battery

electrolyte fluid can leak, which increases

the risk of an explosion and chemical burns.

Contact an authorized Audi dealer or author-

ized Audi Service Facility for more informa-

tion.

Fig. 167 Engine compartment: connectors for a charger or

jump start cables

Observe the safety precautions ðpage 255, Gen-

eral information, ð

in Battery general infor-

mation on page 267 and ð

.

Requirement: only use chargers with a maximum

charging current of 14.8 volts. The battery ca-

bles remain connected.

– Leave the hood open while the 12 volt vehi-

cle battery is charging. If the hood is closed,

it could cause an electrical short circuit,

which increases the risk of fire.

The charging cable connections are located in the

engine compartment. The ground point

ways located on the vehicle body.

–

is al-

Tips

Read all of the manufacturer's instructions

for the charger before charging the battery.

►

Turn off the ignition and all electrical equip-

ment.

►

Open the hood ðpage 257.

Press the release lever on the positive terminal

and fold the cover upward ðfig. 167.

269

Checking and Filling

– Do not use a glass cleaner that contains

paint solvents, because this could damage

the paint.

Windshield washer

system

Service interval display

The service interval display detects when your ve-

hicle is due for service.

The service interval display works in two stages:

– Inspection or oil change reminder: after driv-

ing a certain distance, a message appears in the

instrument cluster display each time the igni-

tion is turned on or off. The remaining distance

or time is displayed briefly.

Fig. 168 Engine compartment: washer fluid reservoir cap

Observe the safety precautions ðpage 255, Gen-

eral information.

– Inspection or oil change due: if your vehicle

has reached an inspection or oil change interval

or both intervals at the same time, the mes-

sage Inspection due! or Oil change due! or Oil

change and inspection due! appears briefly af-

ter turning the ignition on or off.

The windshield washer reservoir  contains the

cleaning solution for the windshield, rear win-

dow, and the headlight washer system*

ðpage 258. The reservoir capacity can be found

in ðpage 328.

Checking service intervals

To reduce the risk of lime scale deposits on the

spray nozzles, use clean water with low amounts

of calcium. Always add window cleaner to the wa-

ter. When the outside temperatures are cold, an

anti-freezing agent should be added to the water

so that it does not freeze.

You can check the remaining distance or time un-

til the next oil change or next inspection in the

Infotainment system.

Applies to MMI: Select on the home screen: VEHI-

CLE > Settings & Service > Service intervals.

Messages

Resetting the indicator

The following messages may appear, depending

on the vehicle equipment:

An authorized Audi dealer or authorized Audi

Service Facility will reset the service interval dis-

play after performing service.



Please add washer fluid

If you have changed the oil yourself, you must re-

set the oil change interval.

Fill the washer fluid for the windshield washer

system and the headlight washer system* when

the ignition is turned off.

Applies to: MMI: To reset the display, select on

the home screen: VEHICLE > Settings & Service >

Service intervals.

Note

– The concentration of anti-freezing agent

must be adjusted to the vehicle operating

conditions and the climate. A concentration

that is too high can result in vehicle dam-

age.

WARNING

Inadequate service, a lack of service, or failing

to adhere to the service intervals can result in

the vehicle breaking down in traffic, acci-

dents, and serious injuries.

– Never add radiator anti-freeze or other addi-

tives to the washer fluid.



270

Checking and Filling

Note

– Only reset the oil change indicator if the oil

was changed.

– Regular service work on the vehicle is not

only beneficial for sustainable use of the ve-

hicle and retention of its value, but also for

operational and traffic safety. For this rea-

son, always have service work performed ac-

cording to the Audi guidelines.

– Even if the mileage on the vehicle is low, do

not exceed the time for the next service.

– Audi is not responsible for damage to the

vehicle that occurred due to inadequate

service or insufficient part availability.

271

Checking and Filling for Your Audi Q8 SUV First Generation (2018-2026)

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