How do I change the Audi drive select mode while driving?

You can change the mode while the vehicle is stationary or moving by pressing the button in the centre console above the selector lever repeatedly until the desired mode appears on the instrument cluster or centre display. Alternatively, on MMI systems, select CAR > Audi drive select from the home screen. If traffic conditions permit, briefly take your foot off the accelerator after changing the mode so that the new mode is also activated for the power unit.

What is the recommended Audi drive select mode for everyday driving?

Audi recommends auto mode for everyday use, as it gives an overall impression of a comfortable but dynamic ride.

What should I do if the power steering fails?

The power assistance may have failed. You must adapt your driving style immediately to allow for the possibility of heavy steering and stop the vehicle in a safe place as soon as possible. Before leaving the vehicle, secure it to prevent it from rolling away. Do not drive on. Seek professional assistance.

How do I restrict or switch off the ESC system?

To restrict the ESC, press the button briefly and the indicator lamp will light up. To switch off the ESC completely, press and hold the button for more than 3 seconds and both indicator lamps will light up. To reactivate the full range of ESC stabilisation functions, press the button again to turn off the indicator lamps.

Why should I not rely solely on four-wheel drive for safety?

Even with four-wheel drive, you should always adjust your speed to suit the conditions. The braking ability of the car is limited by the grip of the tyres, and is no different from a car without four-wheel drive. On wet roads, the front wheels may aquaplane and lose contact with the road if driven too fast, so you must adjust your speed to suit the conditions to avoid accidents.

What does it mean if the ESC indicator lamp flashes while driving?

If the ESC indicator lamp flashes while the vehicle is in motion, the ESC is intervening. Noises may be heard while this is happening. If the indicator lamp lights up permanently, the ESC system has been switched off for system reasons. If the indicator lamp goes out, this means the system is fully functional.

What coolant additive should I use for the Q4 e-tron?

Use only G12evo TL 774 L coolant additive mixed with distilled water. The concentration depends on expected winter temperatures: 40-45% for hot regions (minimum -25°C protection) or 50-55% for cold regions (maximum -40°C protection). Do not use alternative additives, as they risk damage to the electric motor and high-voltage battery.

What should I do if the coolant expansion tank is empty?

Do not add coolant if the expansion tank is empty, as air may have entered the cooling system, risking damage to the electric motor and high-voltage battery. Do not drive on; seek professional assistance immediately.

What are the warning signs for brake fluid problems?

If brake fluid level falls below the MIN mark, the brakes' effectiveness and vehicle safety may be impaired, creating an accident risk. Do not drive on; seek professional assistance. Heavy brake use with old fluid can cause vapour lock, seriously impairing braking effectiveness and safety.

Can I replace the 12-volt battery myself?

No. All battery replacement work must be carried out by a qualified workshop because the vehicle electronics must be calibrated as part of the replacement procedure. Incorrect calibration can cause safety-related functions to fail, creating an accident risk. Additionally, charging cables or jump leads must never be connected directly to the battery; always use the terminals in the front compartment.

How often should I recharge the 12-volt battery if the vehicle sits unused?

The 12-volt battery should be recharged at least once a month if the vehicle is left standing for long periods. If the battery is allowed to discharge completely, an internal chemical reaction will damage it irreparably. Additionally, in winter conditions, have the battery checked by a qualified workshop before the start of winter.

What should I do when the bonnet warning message appears?

If the driver message 'Warning! Bonnet not locked' appears, stop the vehicle without delay and close the bonnet. For safety, the bonnet must always be completely closed when the vehicle is moving. Never drive with an insecurely fastened bonnet, as it could cause an accident.

Model years 2021–2026EU marketManual language: en

Audi Q4 e-tron F4 (2021–2026) owner's manual guide

Select your model year

20212022 2023 2024 2025 2026

This guide summarizes the official owner's manual for the Audi Q4 e-tron F4, model years 2021–2026. It is an original overview - not a reproduction of the manual - covering what each chapter contains and answers to common owner questions, grounded in the manual's content with section and page references.

OwnersAsk is an independent guide and is not affiliated with Audi. For official documentation and support, visit audi.com.

Ask this manual

Answers come only from the Audi Q4 e-tron F4 (2021–2026) owner's manual, with section and page references. Ask in any language.

What the manual covers(229)

Notes on this Owner's Manualp. 7
Quick referencep. 8
Getting startedp. 8
Online informationp. 8
FAQsp. 8
Front cabinp. 11
Overview of warning and indicator lampsp. 12
Displays and controlsp. 17
Instrument clusterp. 17
Overview of instrument clusterp. 17
How to use the multi-function steering wheelp. 17
Selecting the displayp. 18
Power meterp. 19
Mileage recorderp. 19
Outside temperature displayp. 19
Vehicle functionsp. 19
Touch displayp. 21
General instructions for using the touch displayp. 21
Multi Media Interfacep. 23
Head-up displayp. 29
Descriptionp. 29
Speech dialogue systemp. 30
General informationp. 30
Descriptionp. 30
External voice control functionp. 31
Global functionsp. 32
Other function selector buttonsp. 32
Setting offp. 33
Personal settingsp. 33
Usersp. 33
Opening and closingp. 35
Central locking systemp. 35
Keysp. 40
Boot lidp. 42
Child lockp. 46
Electric windowsp. 47
Panoramic glass roofp. 48
Garage door openerp. 49
Lights and visionp. 52
Exterior lightsp. 52
Interior lightsp. 56
Clear visionp. 57
Windscreen wipersp. 58
Sitting correctly and safelyp. 62
Ensuring the correct seating positionp. 62
Front seatsp. 62
Steering wheelp. 64
Head restraintsp. 65
Seat beltsp. 66
Memory functionp. 69
Airbag systemp. 70
Child restraint systemsp. 73
Storage and conveniencep. 80
Power sourcesp. 80
Cup holdersp. 80
Storage compartmentsp. 81
Luggage compartmentp. 81
Roof carrierp. 85
Heating and coolingp. 86
Air conditionerp. 86
Steering wheel heatingp. 90
Auxiliary air conditionerp. 90
Fluids in the air conditionerp. 92
Drivingp. 93
Starting the vehiclep. 93
Driving the vehiclep. 94
Power unitp. 96
Brakesp. 98
Electromechanical parking brakep. 100
Special driving situationsp. 102
Handling dynamicsp. 103
Audi drive selectp. 103
Suspensionp. 103
Steeringp. 104
Four-wheel drive (quattro)p. 105
Electronic stabilisation controlp. 105
High-voltage systemp. 108
General informationp. 108
Charging the high-voltage batteryp. 111
Charging settingsp. 118
Charging equipmentp. 122
Towing a trailerp. 135
Driving the vehicle with a trailer or caravanp. 135
Swivelling towing bracketp. 137
Towing bracket with square tubep. 141
Assistance systemsp. 143
Driver assist systemsp. 143
General informationp. 143
Sensors for detecting the vehicle's surroundingsp. 144
Driver assist menup. 146
Parking aid menup. 147
Driver informationp. 148
Speed warningp. 148
Camera-based traffic sign recognitionp. 148
Traffic light informationp. 150
Fatigue warningp. 152
Distraction warningp. 153
Driver assistancep. 155
Speed regulation systemsp. 155
Efficiency assistp. 158
Adaptive cruise assistp. 159
Distance warningp. 171
Lane departure warningp. 172
Audi pre sensep. 174
Side assistp. 178
Exit warningp. 179
Emergency assistp. 180
Parking and manoeuvringp. 182
Introductionp. 182
Rear parking aidp. 182
Parking aid plusp. 184
Reversing camera/surround view camerasp. 186
Rear cross-traffic assistp. 190
Assisted parkingp. 191
Park assist plusp. 193
Infotainmentp. 197
Telephonep. 197
Introductionp. 197
Setting upp. 197
Using the Audi phone boxp. 199
Using the telephonep. 201
Settingsp. 204
Messagesp. 205
Troubleshootingp. 206
Audi connectp. 208
General informationp. 208
Audi connect infotainmentp. 209
Establishing a Wi-Fi connectionp. 209
Using the Wi-Fi hotspotp. 209
Audi connect infotainment servicesp. 210
Functions on demandp. 210
Audi connect appsp. 211
Audi connect vehicle control servicesp. 211
Settingsp. 212
Troubleshootingp. 213
Emergency callp. 214
Overviewp. 214
Emergency callp. 214
Online roadside assistance callp. 216
Information on data processingp. 216
Information on third-party services and other services with added benefitp. 217
Navigationp. 218
Calling up the navigation menup. 218
myAudi navigationp. 218
Entering a destinationp. 219
Stopping route guidancep. 223
Mapp. 223
Predictive route guidancep. 225
Alternative routesp. 226
Further functionsp. 226
Satellite mapp. 227
Electric rangep. 227
Map updatep. 228
Traffic informationp. 228
Hazard alertsp. 230
Settingsp. 230
Radiop. 233
General informationp. 233
Radio functionsp. 234
Online radiop. 236
Options and settingsp. 238
Troubleshootingp. 239
Mediap. 240
General informationp. 240
Bluetooth audio playerp. 240
Multimedia connectionsp. 241
Playing mediap. 242
Options and settingsp. 245
Supported media and file formatsp. 246
Troubleshootingp. 247
In-car experiencep. 249
Themesp. 249
Smartphone interfacep. 250
Setting upp. 250
Troubleshootingp. 251
Further settingsp. 252
System settingsp. 252
Software updatep. 253
Connected devicesp. 254
Legal informationp. 255
Service and carep. 256
Checking and topping up fluidsp. 256
Front compartmentp. 256
Cooling systemp. 259
Brake fluidp. 261
Electrical systemp. 262
Batteryp. 263
Windscreen washer systemp. 266
Service interval displayp. 266
Wheelsp. 268
Tyres and rimsp. 268
Tyre pressure loss indicatorp. 273
Care of vehicle and cleaningp. 275
General informationp. 275
Washing the vehiclep. 275
Information on cleaning and carep. 276
Taking the vehicle out of servicep. 280
Self-helpp. 281
Mobilityp. 281
General informationp. 281
Equipmentp. 281
Tyre repair kitp. 282
Changing a wheelp. 284
Jump-startingp. 286
Towing awayp. 288
Fuses and bulbsp. 291
Fusesp. 291
Bulbsp. 293
Customer informationp. 294
Data protectionp. 294
Information on data protectionp. 294
Image recordingp. 294
Memoryp. 294
Information transmittedp. 295
Accessories and modifications to the vehiclep. 298
Maintenance, repairs and modifications to the vehiclep. 298
Accessories and replacement partsp. 299
Position for a toll device on the windscreenp. 300
Technical datap. 301
Identification datap. 301
Vehicle datap. 301
Other informationp. 304
Trademarks and licencesp. 304
Driving school modep. 304
Information according to EU chemicals regulation REACHp. 304
Information on waste disposalp. 304
Radio equipmentp. 305
Additional customer informationp. 308
Indexp. 310

Dashboard warning lights(88)

What each warning light means, extracted from the manual. Always confirm the full procedure on the cited page or with a workshop.

Light	Meaning	What to do	Page
Seat belt	Seat belt not fastened or unfastened while driving	Fasten seat belt immediately	p. 12
A/C Air conditioner	Air conditioning system malfunction	Refer to air conditioner section for guidance	p. 12
Drive system	Drive system fault or high-voltage system issue	Refer to drive system and electrical system sections	p. 12
Brake system	Brake system or electromechanical parking brake fault	Refer to brake system section	p. 12
Electromechanical parking brake	Parking brake system malfunction	Refer to parking brake section	p. 12
Steering	Steering system fault	Refer to steering section	p. 12
Steering lock	Steering lock activated or malfunction	Refer to steering lock section	p. 12
Adaptive cruise assist	Adaptive cruise assist malfunction or take over required	Refer to adaptive cruise assist section	p. 12
Lane departure warning	Vehicle drifting from lane	Refer to lane departure warning section	p. 13
Pre sense	Pre sense safety system activation or alert	Refer to pre sense section	p. 13
Software update	Software update in progress or required	Refer to software update section	p. 13
Bonnet	Bonnet is open or not fully closed	Close bonnet securely	p. 13
Cooling system	Cooling system fault or temperature warning	Refer to cooling system section	p. 13
Central locking system	Central locking system malfunction	Refer to central locking section	p. 13
Battery in remote control key	Remote control key battery low	Replace battery in remote control key	p. 13
Brake pads	Brake pads worn or require servicing	Service brake pads as soon as possible	p. 13
Tyre pressure	Tyre pressure low or malfunction in pressure monitoring system	Check and adjust tyre pressure	p. 14
Seat belt warning lamp (flashing/lit)	One or more seat belts are not fastened or were unfastened while vehicle is moving	Fasten seat belts before and during travel	p. 69
Rear seat belt indicator lamp (lit)	Rear seat belt for corresponding seat is not buckled or seat is not occupied	Fasten rear seat belts for occupied seats	p. 69
Rear seat belt indicator lamp (fastened)	Rear seat belt has been fastened for corresponding seat	None required	p. 69
Safety system monitoring lamp (lit/flashing during driving or does not light at ignition on)	Fault in airbag system, control units, sensors, wiring, or belt tensioners	Drive to qualified workshop without delay	p. 71
PASSENGER AIR BAG OFF (indicator lamp lit)	Front passenger airbag is deactivated	Reactivate when child restraint system no longer needed	p. 73
PASSENGER AIR BAG ON (indicator lamp brief light)	Front passenger airbag is activated	None required	p. 73
Steering: fault. Please stop vehicle	Malfunction in the electronic steering lock; ignition can no longer be switched on	Do not drive. Secure the vehicle to prevent rolling away. Do not have it towed. Seek professional assistance	p. 104
Steering: fault. You can continue driving	Fault in the steering system; steering may be heavier or more sensitive than usual	Adjust driving style accordingly. Have the steering checked by a qualified workshop without delay	p. 104
Steering lock: fault. Please contact workshop	Malfunction in the electronic steering lock	Drive to a qualified workshop soon and have the fault rectified	p. 104
Suspension: fault. You can continue driving	A malfunction has occurred in the suspension system	Drive to a qualified workshop soon	p. 104
Four-wheel drive: fault. Restricted stability. Please contact workshop	Vehicle's stability is restricted due to four-wheel drive system malfunction	Continue driving carefully. Drive to a qualified workshop soon	p. 105
Stabilisation control (ESC/ABS): fault! See owner's manual	Fault in the ABS or EDL, causing ESC malfunction	Drive to a qualified workshop without delay and have the fault rectified	p. 106
Power grid/domestic connection LED (green)	Charging unit is ready to charge but not yet charging	Start the charging cycle as described on page 112	p. 125
Vehicle LED (pulsating green)	Vehicle is being charged with PE conductor monitoring activated	No action required; charging is proceeding normally	p. 125
Power grid LED (pulsating green)	Mains plug has overheated, possibly due to multiphase socket connected to single-phase system	Vehicle will charge with reduced power; fault clears automatically when plug cools down. If fault persists, have electrician check power grid	p. 125
Power grid and Vehicle LEDs (yellow)	Vehicle is being charged with PE conductor monitoring deactivated	For unearthed networks: no action required. For earthed networks: activate PE conductor monitoring on page 123	p. 126
Control console LED (yellow)	Operating unit has overheated	Vehicle charges with reduced power; fault clears automatically when unit cools. Do not expose unit to direct sunlight. If fault persists, have qualified workshop check unit	p. 126
Vehicle LED (red)	Charger is connected and charging cycle completed successfully or vehicle does not need charging	No action required	p. 126
Power grid LED (red)	Mains plug has overheated and charging cycle interrupted	Fault clears automatically when plug cools and charging resumes. If fault persists, have qualified workshop check unit and electrician check power grid	p. 126
Control console LED (red)	Operating unit has overheated and charging cycle interrupted	Fault clears automatically when unit cools and charging resumes. Do not expose to direct sunlight. If fault persists, have qualified workshop check unit	p. 127
Power grid LED (red, flashing)	Charging infrastructure restricted due to low voltage or poor mains frequency	Charging resumes automatically when power grid stabilizes. If fault persists, have electrician check power grid	p. 127
Vehicle LED (red, flashing)	Fault in vehicle charging system	Charging resumes automatically when system stabilizes. If fault persists, have qualified workshop check vehicle	p. 127
Control console LED (red, flashing)	Mains or vehicle cable is defective, likely due to mismatch in coding resistance	Have mains or vehicle cable replaced by qualified workshop or Audi dealership	p. 127
All status LEDs (red, various)	Multiple fault conditions including vehicle charging system faults, voltage surges, PE conductor issues, and operating unit failures	Actions vary: disconnect mains and reconnect after 60 seconds for some faults; have qualified workshop inspect for others. See page 127-128 for specific remedies	p. 127
Power supply indicator (green LED)	Power supply is connected	Normal operation	p. 130
Safety device indicator (green LED)	Safety device is functioning properly	Normal operation	p. 130
Vehicle indicator (green LED)	Vehicle is properly connected	Normal operation	p. 130
Fault indicator (red LED)	A fault has occurred in the charging system, power supply, safety device, or vehicle	Unplug cables, allow to cool down, and plug back in. If fault persists, have checked by qualified workshop or Audi dealership	p. 130
Speed/distance regulating function active, no vehicle detected	Adaptive cruise assist is maintaining set speed with no vehicle ahead	System is operating normally	p. 161
Speed/distance regulating function active, vehicle detected	Adaptive cruise assist is regulating speed and maintaining distance to vehicle in front	System is automatically accelerating and braking	p. 161
System not ready to drive off, vehicle detected	Adaptive cruise assist is active but vehicle is stationary and will not move automatically	Driver must manually restart vehicle	p. 161
You must intervene - braking insufficient	System cannot brake vehicle sufficiently or safe start monitor warning active	Driver must immediately take over braking	p. 161
Lane guidance active	Lane guidance function is assisting with steering inputs	System is operating normally	p. 161
Actively take over steering immediately	System limits reached or no steering activity detected	Driver must immediately resume steering control	p. 161
Lane guidance switched on but not active	Lane guidance is available but cannot operate due to system limitations	Driver maintains full steering control	p. 161
Assisted lane change available	System has detected no objects in adjacent lane and can perform assisted lane change	Driver can initiate lane change via turn signal	p. 164
Lane guidance indicator lamp (white)	Lane guidance is switched on but not active due to system limitations	Continue driving; system cannot detect lane markings or conditions are unsuitable	p. 164
Take over braking prompt (Distance! message)	Adaptive cruise assist cannot brake sufficiently to maintain safe distance	Apply brake pedal to slow down vehicle	p. 165
Take over steering prompt	System steering limits reached or insufficient steering detected	Actively take over steering immediately; keep hands on wheel	p. 166
Safe start monitor warning lamp	Obstacle detected while vehicle is ready to drive off	Press brake pedal if necessary; ensure no obstacles between your vehicle and vehicle ahead	p. 170
Orange warning symbol in instrument cluster	Adaptive cruise assist functions unavailable or restricted due to fault	Clean sensor area in front (page 144); switch system on again later; if fault persists, drive to qualified workshop soon	p. 171
Distance warning lamp	Vehicle distance continuously below warning threshold at speeds above 65 km/h	Adjust distance to vehicle in front; note warning is only given if distance below threshold for extended period, not brief periods during overtaking	p. 171
White line(s) in lane departure warning display	Lane departure warning system switched on but not ready to give warnings on corresponding side	System awaits detection of lane markings on that side	p. 172
Green line(s) in lane departure warning display	Lane departure warning system switched on and ready to give warnings on corresponding side	System is active and will warn if approaching lane demarcation	p. 172
Red line in lane departure warning display	Lane departure warning system actively correcting steering before crossing lane demarcation	Allow system to correct steering; take over if needed; manually steer to center of lane	p. 173
Red lines on both sides in lane departure warning display	Lane guidance function of emergency assist is active	Refer to emergency assist information page 178	p. 173
Lane departure warning off symbol	Lane departure warning system is switched off	Activate system in Driver assist menu (page 144) or press button on turn signal lever	p. 173
Audi pre sense warning in instrument cluster	Audi pre sense basic has detected unstable driving situation or emergency/preventative braking event at speeds above 30 km/h	Take appropriate evasive action or braking; be prepared to assume full control	p. 174
Audi pre sense front warning	Danger of frontal collision detected at speeds above 5 km/h	Take evasive action or brake hard; if vehicle braked to standstill, take control as instructed by 'Please take control!' message	p. 175
Audi pre sense fault indicator	Audi pre sense system functions unavailable or restricted	Clean sensor areas (page 144); switch ignition off and back on; if fault persists, drive to qualified workshop soon	p. 177
Side assist warning signal on exterior mirror (steady)	Critical object detected in blind spot or adjacent lane during information mode (no turn signal activated)	Check before changing lane; activate turn signal to switch to warning mode with flashing indicator	p. 178
Side assist warning signal on exterior mirror (flashing)	Critical object detected when turn signal activated (warning mode) or other driver assist systems detect lane departure risk	Do not change lane; check mirror and blind spot; be prepared to correct steering	p. 178
Side assist warning signal on exterior mirror	Critical object detected in blind spot or approaching from behind	Do not change lanes; check mirrors and blind spot before proceeding	p. 178
Exit warning signal on exterior mirror	Traffic approaching from behind detected while door is open	Do not exit vehicle until traffic has passed; always monitor surroundings	p. 179
Emergency assist display symbol	Lane guidance is active or system is intervening in critical situation	Follow system warnings; override by steering, braking, or accelerating if needed	p. 180
Parking aid visual warning segments (red)	Obstacles detected in direction of vehicle travel within collision zone	Stop vehicle immediately and do not continue reversing or moving forward	p. 182
Parking aid visual warning segments (white)	Objects detected outside immediate path of travel	Monitor movement and maintain distance from obstacles	p. 182
Sensor fault indicator (appears as symbol)	Sensor in corresponding area or loudspeaker is faulty	Drive to qualified workshop soon and have fault rectified	p. 185
Iced up or dirty sensor indicator (appears as symbol)	Ultrasonic sensor is iced up or dirty	Clean the area in front of the sensors	p. 185
Parking aid unavailable symbols (appears as symbols)	Parking aid functions are unavailable or restricted due to weather conditions or sensor obstruction	Clean sensors and attempt to switch system on again later; if persists, drive to qualified workshop	p. 185
Surround view camera unavailable symbol (appears as //)	Camera will not be available on corresponding side; exterior mirrors retracted or door/boot lid open	Check mirror position and door/boot status	p. 187
Camera malfunction symbol (appears as symbol)	System fault has occurred and camera display area is not available	Drive to qualified workshop soon and have fault rectified	p. 187
Rear cross-traffic assist fault symbols	Rear cross-traffic assist functions are unavailable or restricted	Clean sensors on rear corners and attempt to switch system on again later; if persists, drive to qualified workshop	p. 190
Coolant level warning lamp	Coolant level is too low	Switch off ignition and do not drive on; check coolant level	p. 259
Electric drive overheating warning	Electric drive overheating	Safely stop vehicle and switch off ignition; seek professional assistance	p. 259
Brake fluid warning	Brake fluid level is below minimum	Stop vehicle and check brake fluid level; seek professional assistance	p. 260
Electrical system fault (general)	Power supply, battery fault, or electrical system fault	Stop vehicle safely, switch off ignition, seek professional assistance	p. 262
Electrical system low battery charge	12-volt battery has low charge	Continue driving; battery will recharge from high-voltage battery. If message persists, drive to qualified workshop	p. 262
Electrical system restricted	12-volt power supply is restricted due to discharged or underperforming battery	Drive carefully, switch off unnecessary energy consumers; if warning persists, seek professional assistance	p. 263
Please add washer fluid	Windscreen washer and headlight washer system fluid level is low	With ignition switched off, top up the fluid	p. 266
Tyre pressure loss indicator lamp	Loss of pressure on one or more tyres or system malfunction	Check and adjust tyre pressures, store new pressures; if lamp flashes without stored pressures or does not go out after storing, drive to qualified workshop without delay	p. 273

Fuses(66)

Fuse	Rating	Circuit	Page
2	Unknown	Airbag control unit	p. 291
3	Unknown	Towing bracket	p. 291
4	Unknown	Front camera for driver assist systems	p. 291
5	Unknown	Control unit for vehicle electrical system, rear light (left-side)	p. 291
6	Unknown	Control unit for vehicle electrical system, interior lighting, background lighting	p. 291
7	Unknown	Air conditioner, seat heating	p. 291
8	Unknown	Panoramic glass roof	p. 291
9	Unknown	Door control unit (left)	p. 291
10	Unknown	Lumbar support (front left)	p. 291
11	Unknown	Towing bracket	p. 291
13	Unknown	Control unit for vehicle electrical system, central locking system, windscreen washer system	p. 291
14	Unknown	Sound system	p. 291
16	Unknown	Power supply for measurement wiring harness	p. 291
17	Unknown	Parking aid, side assist	p. 291
18	Unknown	Steering column lock, control unit for convenience access and start authorisation, anti-theft alarm system, external sound generator	p. 291
19	Unknown	Instrument cluster, emergency call and communication control unit	p. 291
20	Unknown	Audi phone box, USB connection, control unit for Audi connect apps	p. 291
21	Unknown	Camera systems	p. 291
22	Unknown	Drive system control unit	p. 291
23	Unknown	Control unit for internet access	p. 291
25	Unknown	Belt tensioners (driver's side)	p. 291
26	Unknown	Door control unit (right)	p. 291
2	Unknown	Airbag control unit (dash panel) / Anti-lock brake system, electronic stabilisation control, drive system control unit (front compartment)	p. 291
3	Unknown	Towing bracket (dash panel) / Electric drive system, high-voltage charger (front compartment)	p. 291
4	Unknown	Front camera for driver assist systems (dash panel) / Left headlight (front compartment)	p. 291
5	Unknown	Control unit for vehicle electrical system, rear light left-side (dash panel) / Right headlight (front compartment)	p. 291
13	Unknown	Control unit for vehicle electrical system, central locking system, windscreen washer system (dash panel) / Anti-lock brake system, electronic stabilisation control (front compartment)	p. 291
16	Unknown	Power supply for measurement wiring harness (dash panel) / Power unit cooling (front compartment)	p. 291
26	Unknown	Door control unit right	p. 291
23	Unknown	Control unit for internet access (dash panel) / Drive system control unit (front compartment)	p. 292
25	Unknown	Belt tensioners driver's side (dash panel) / Thermal management, high-voltage heater (front compartment)	p. 292
27	Unknown	Belt tensioners front passenger's side	p. 292
28	Unknown	Emergency cut-out connection for high-voltage battery, high-voltage charging system	p. 292
29	Unknown	Towing bracket	p. 292
30	Unknown	Infotainment system	p. 292
31	Unknown	Towing bracket	p. 292
32	Unknown	Control unit for vehicle electrical system, rear light right-side (dash panel) / Brake system pressure accumulator (front compartment)	p. 292
33	Unknown	Lumbar support	p. 292
34	Unknown	A/C control console	p. 292
36	Unknown	Air conditioner blowers	p. 292
37	Unknown	Boot lid control unit	p. 292
39	Unknown	Steering column electronics	p. 292
40	Unknown	Anti-theft alarm system	p. 292
41	Unknown	Diagnostic interface	p. 292
42	Unknown	Selector lever, garage door opener	p. 292
43	Unknown	Interior temperature sensor, air quality sensor, A/C control console, rear window heating	p. 292
9	Unknown	Door control unit (left) (dash panel) / Horn (front compartment)	p. 293
10	Unknown	Lumbar support front left (dash panel) / Wipers (front compartment)	p. 293
11	Unknown	Towing bracket (dash panel) / A/C relay, compressor, A/C components, A/C control console rear, air quality sensor, ioniser (front compartment)	p. 293
15	Unknown	Anti-lock brake system, electronic stabilisation control	p. 293
18	Unknown	Steering column lock, control unit for convenience access and start authorisation, anti-theft alarm system, external sound generator (dash panel) / Windscreen heating (front compartment)	p. 293
24	Unknown	Power unit cooling	p. 293
44	Unknown	Light/rain/humidity sensor, interior lighting, roof module, anti-theft alarm system, diagnostic connection, light switch, driver and convenience functions	p. 293
45	Unknown	Steering column electronics (dash panel) / Not listed separately (front compartment)	p. 293
46	Unknown	MMI control dial, centre display, head-up display	p. 293
47	Unknown	Suspension control	p. 293
48	Unknown	USB connection	p. 293
52	Unknown	12-volt socket	p. 293
59	Unknown	Interior mirror, 12 V socket, seat occupied recognition sensor front passenger seat	p. 293
60	Unknown	Power supply for measurement wiring harness, diagnostic connection	p. 293
61	Unknown	Electric drive system	p. 293
66	Unknown	Rear window wiper	p. 293
67	Unknown	Rear window heating	p. 293
12	Unknown	External sound generator	p. 293
17	Unknown	Windscreen heating	p. 293
26	Unknown	Coolant pump for high-voltage heater, cooling air inlet adjustable	p. 293

Fluids & capacities(4)

Fluid	Capacity	Specification	Page
Coolant additive	Variable based on frost protection requirements	G12evo TL 774 L; 40-45% (hot regions, min -25°C) or 50-55% (cold regions, max -40°C)	p. 260
Windscreen washer container	See page 299	Clean water with washer fluid; anti-freeze in cold weather	p. 266
Windscreen washer system	3	litres	p. 301
Windscreen/headlight washer system	6	litres	p. 301

Service intervals(8)

Item	Interval	Page
Wiper blades	Once or twice a year	p. 60
Brake fluid	Must be changed at regular intervals by a qualified workshop	p. 261
12-volt battery	Should be recharged at least once a month if vehicle is left standing for long periods	p. 263
Inspection reminder	After a certain mileage	p. 266
Tyre inspection for excessive wear	Every 5,000 km – 10,000 km if vehicle driven with fast cornering, heavy acceleration or hard braking	p. 269
Tyre pressure check	At least once a month and before long journeys	p. 271
Low-profile tyre inspection for damage	Every 3,000 km	p. 272
Wax application to paintwork	At least twice a year	p. 277

Frequently asked questions(12)

How do I change the Audi drive select mode while driving?: You can change the mode while the vehicle is stationary or moving by pressing the button in the centre console above the selector lever repeatedly until the desired mode appears on the instrument cluster or centre display. Alternatively, on MMI systems, select CAR > Audi drive select from the home screen. If traffic conditions permit, briefly take your foot off the accelerator after changing the mode so that the new mode is also activated for the power unit.
What is the recommended Audi drive select mode for everyday driving?: Audi recommends auto mode for everyday use, as it gives an overall impression of a comfortable but dynamic ride.
What should I do if the power steering fails?: The power assistance may have failed. You must adapt your driving style immediately to allow for the possibility of heavy steering and stop the vehicle in a safe place as soon as possible. Before leaving the vehicle, secure it to prevent it from rolling away. Do not drive on. Seek professional assistance.
How do I restrict or switch off the ESC system?: To restrict the ESC, press the button briefly and the indicator lamp will light up. To switch off the ESC completely, press and hold the button for more than 3 seconds and both indicator lamps will light up. To reactivate the full range of ESC stabilisation functions, press the button again to turn off the indicator lamps.
Why should I not rely solely on four-wheel drive for safety?: Even with four-wheel drive, you should always adjust your speed to suit the conditions. The braking ability of the car is limited by the grip of the tyres, and is no different from a car without four-wheel drive. On wet roads, the front wheels may aquaplane and lose contact with the road if driven too fast, so you must adjust your speed to suit the conditions to avoid accidents.
What does it mean if the ESC indicator lamp flashes while driving?: If the ESC indicator lamp flashes while the vehicle is in motion, the ESC is intervening. Noises may be heard while this is happening. If the indicator lamp lights up permanently, the ESC system has been switched off for system reasons. If the indicator lamp goes out, this means the system is fully functional.
What coolant additive should I use for the Q4 e-tron?: Use only G12evo TL 774 L coolant additive mixed with distilled water. The concentration depends on expected winter temperatures: 40-45% for hot regions (minimum -25°C protection) or 50-55% for cold regions (maximum -40°C protection). Do not use alternative additives, as they risk damage to the electric motor and high-voltage battery.
What should I do if the coolant expansion tank is empty?: Do not add coolant if the expansion tank is empty, as air may have entered the cooling system, risking damage to the electric motor and high-voltage battery. Do not drive on; seek professional assistance immediately.
What are the warning signs for brake fluid problems?: If brake fluid level falls below the MIN mark, the brakes' effectiveness and vehicle safety may be impaired, creating an accident risk. Do not drive on; seek professional assistance. Heavy brake use with old fluid can cause vapour lock, seriously impairing braking effectiveness and safety.
Can I replace the 12-volt battery myself?: No. All battery replacement work must be carried out by a qualified workshop because the vehicle electronics must be calibrated as part of the replacement procedure. Incorrect calibration can cause safety-related functions to fail, creating an accident risk. Additionally, charging cables or jump leads must never be connected directly to the battery; always use the terminals in the front compartment.
How often should I recharge the 12-volt battery if the vehicle sits unused?: The 12-volt battery should be recharged at least once a month if the vehicle is left standing for long periods. If the battery is allowed to discharge completely, an internal chemical reaction will damage it irreparably. Additionally, in winter conditions, have the battery checked by a qualified workshop before the start of winter.
What should I do when the bonnet warning message appears?: If the driver message 'Warning! Bonnet not locked' appears, stop the vehicle without delay and close the bonnet. For safety, the bonnet must always be completely closed when the vehicle is moving. Never drive with an insecurely fastened bonnet, as it could cause an accident.

More Audi manuals: A1 GB (2018–2026), A3 8Y (2020–2026), A5 B10 (2025–2026), A5 B9 (2017–2019), A6 C7.5 (2014–2018), A6 C8 (2019–2023), A6 C9 (2025–2026), A7 C8.5 (2023–2025), A8 D5.5 (2021–2026), Q2 GA.5 (2020–2026), Q3 F3 (2018–2025), Q5 Gen3 (2025–2026), Q6 e-tron FZ (2024–2026)