2021 AUDI A4 service

8W1012721BC
Foreword
Thank you for choosing an Audi - we value your trust in us.
Your new Audi will allow you to experience the best in groundbreaking technology and premium quality
equipment that a vehicle has to offer. Audi recommends that you read your Owner's Manual thoroughly
so that you quickly become acquainted with your Audi and make use of all of its features.
In addition to explaining how the different features work, there are many useful tips and information
concerning your safety, how to care for your vehicle, and how to maintain your vehicle's value. Audi also
gives you useful tips and information on how to drive your vehicle more efficiently and in an environ-
mentally-friendly manner.
Audi hopes you enjoy driving your vehicle and wishes you safe and pleasant motoring.

ZA\ warNiNc

Operating, servicing and maintaining a passenger vehicle or
off-highway motor vehicle can expose you to chemicals includ-
ing engine exhaust, carbon monoxide, phthalates, and lead,
which are known to the State of California to cause cancer and
birth defects or other reproductive harm. To minimize expo-
sure, avoid breathing exhaust, do not idle the engine except as
necessary, service your vehicle in a well-ventilated area and
wear gloves or wash your hands frequently when servicing
your vehicle. For more information go to www.P65Warnings.
ca.gov/passenger-vehicle.

8W1012721BC
Table of contents


All wheel drive (quattro).............. 112
Electronic Stabilization Control......... 113
Trailer towing.................... 115
Driving with atrailer................. 115
Assist systems................... 117
Assist systems................... 117
General information. . 117
Surrounding area detection............ 118
Driving information.............. L241
Speed warning systeM.........-.00 00 121
Camera-based traffic sign recognition... 121
Traffic light information.............. 123
Lap tel ws = = sees 5 5 ses 2 2 eee ge ee 124
Integrated Toll Module............... 125
Driver assistance................. 127
Cruise control system............20-- 127
Efficiency assist....... 0.00... 128
Audi adaptive cruise control........... 130
Traffiejaim assists: « ¢ sas s o aerey & 2 sores x 138
Distance warning ...... 2.00... .00000. 140
Audi active lane assist/lane departure
WARNING: = = wey = o eee 2 o wees 2 Rae & 2 BS 141
Audi pre sense... ...... cee eee eee 143
Side assist... 0.0.6... cece eee eee 147
EXit Warnitig ces s = ewes 5 & eee § o eee es 148
Parking and maneuvering....... 150
TNtROGUetiON « = sew ce sees 5 2 eee : x ewer 150
Parkirigiaid plus o seswies «5 acinwse ow enanave a & ox 150
Rearview camera and peripheral cameras. 152
Rear cross-traffic assist.............0. 156
Assisted
parking............ 0 eee eee 157
Park assist... 0.0... ccc eee ee 159
Infotainment system............ 162
Telephone..................-0-005 162
Introduction................ 0000-0 162
S@tUP -cusy 9 sous & ¥ Sew Yo eR Es ewe 162
Using the Audi phone box............. 164
Using the telephone.................. 166
SOtUiNGS sisis < & eawig + eels # eee s BwR 169
MOSSAQESicies «i sanswis 6 v sete + 0 oxime 4 9 aie 170
Troubleshooting............--.000005 172
PRCT COMMBCE 's. cosves 5 6 sivas 6 6 snes 8 oo LS
General information................- 173
Audi connect Infotainment............ 173
Using a Wi-Fi hotspot................ 174
Audi connect Infotainment services..... 174
Functions on demand................ 175
Audi connect vehicle control services.... 175
Settings............. 0.0.00 002 eee 176
TRGUBIESHOOLING sass ¢ scm s 3 Hae 5 tee 177
Emergency call................... 178
Overview... 12.0... eee eee eee 178
Emergenicy'call « css s sees 6 s gems © + eeu 178
Online roadside assistance............ 179
NaViGGationtc: « « meus « & seu sc poms + «oe 181
Opening navigation............0..005 181
myAudi navigation...............000. 181
Entering a destination................ 182
Stopping route guidance.............. 185
Map... .. see cece eee eee 185
Alternative routes.............2-.00. 187
Additional functions................. 187
Satellite map.......... 2.0... ee eee 188
Mapupdaté-: « 2cas ss ees 9 ¢ eews vs pee 189
Traffic incidents’. = vce se eeu ve exon ewe 190
SETEIIGS sseneie oo smeneie © oxemenene © sitadame @ © etnznis 191
RAGUIG:: « cas 2 = seus « s pomp o 6 com 2 ¢ ce 193
General information................. 193
Radio functions................00005 194
Online radio's: ss sees ss eees ye epee se ee 197
Options and settings.............0005 198
Troubleshooting..............--000-5 199
PRE wei. as aoscen oo sauweme 3 & coset 3 v wens 201
Generalinformation................. 201
Bluetooth audio player............... 201
Amazon Alexa... 0.000 s eee bee eee ees 202
Multimedia connections.............. 202
Playing media. ........ 2. cece eee eee 203
Options and settings................. 207
Supported media and file formats...... 207
Troubleshooting..............--.0005 209
Audi smartphone interface...... 210
Setup... 2... eee eee eee 210
Troubleshooting.............---.00-5 211

Table of contents


Additional settings.............. 212
System settingS.............ce ee eee 212
Software update... 1.2... .. cc cece ee eee 213
Connected devices.............000 005 214
Legalinformation................... 215
Additional information.......... 216
Brands and licenses..............0-0- 216
Maintenance and Care........... 217
Checking and Filling............. 217
LE 217
Refttelingiecs ss sees s eames s Reee ee ewe 218
Emissions control system............. 220
Engine compartment................. 221
ENGING2Otls sees 2 x seus « ones x ove Bee 224
Cooling:system « « ssccses ve emacs ve asecane s & ave 227
Brake fluid... 0.2... eee eee eee 229
Electrical system............22---05- 230
Battery’: « & ces «6 cow © 6 eee «8 eens ¥ oe 230
Windshield washer system...........- 233
Service interval display............... 233
WSENGRRES Ee ceicece 0 ccneace x 0 wprsnne x « scecane a 0 ane 235
Wheels and Tires . . 235
Tire pressure monitoring system....... 252
Care and cleaning................ 255
Generalinformation................. 255
Car washes « sscica ea scam a 0 eine oo acne 0 6 255
Cleaning and care information......... 256
Taking your vehicle out of service....... 260
Do It Yourself .................... 261
Emergency assistance........... 261
General information...........0..0.. 261
Equipment.............00- cece eee 261
Tire Mobility’ kit «0. ss cece se ces se ee 261
Changing’ tire = sco: +s ween so some 2 2 ore 263
Space-saving spare tire............... 266
Collapsible spare tire..............0.. 267
JUIMP'StAFting « wos s = weve s eerws F coos 268
TOWING wwewiwe «2 exersie w > suseine 6 > cxememe 6 4 cuneec 269
Fuses and bulbs.................. 272
FUSCSiercs ao accsans wo cena wo ee @ 8 ROIS & ore 272
Bulbs... 0.0... cee eee eee eee 276
Customer information........... 277
Data privacy..................008. 277
Privacy MOtiCe « mes x x eee 2 Ree ¢ RES ¥ 277
Image recording): « « sus 2 wanes 2 2 wweem 2 2s 277,
Data memories............0..00 eee ee 277
Transmitted information.............. 278
Accessories and technical
changes................ 0.0.02 eee 281
Warranty’: « + esos & + meen & ¢ eee se sees 281
Audi Literature Shop.............000- 281
Driving in other countries............. 281
Maintenance, repairs, and technical
IMOGIFICATIONS « snocue so sume = emmace # m annem 281
Accessories and parts..............-. 283
Reporting Safety Defects.............. 283
Declaration
of compliance for
telecommunications equipment and
electronicisysteMms:: s = caws se waa « 2 gems 284
Technical data.................... 286
Identification data................04. 286
Vehicle datas ss nico s ves se oman evs 286
Index ...... 00.0... eee eee 288

8W1012721BC
Instrument cluster


vehicle safely. See an authorized Audi dealer
or authorized Audi Service Facility for assis-
tance.

G) Tips
— The following pages primarily show illustra-
tions of the Audi virtual cockpit*. The dis-
play or location of the items that are shown
may vary on the different versions of the in-
strument cluster.
— You can select the units used for tempera-
ture, speed, and other measurements
=> page 212.
— Speeds are displayed in mph (miles per
hour) or km/h (kilometers per hour).
— Certain instrument cluster content can also
be displayed in the head-up display*
=>page 25.
Operating

Fig. 5 Left side of multifunction steering wheel
Information is organized within various tabs @)
in the instrument cluster. The tab contents are
displayed in the central area (2).
Requirement: the ignition must be switched on.
RAZ-0377

Selecting a tab
> Press the button @) repeatedly until the
desired tab is selected.
Returning to functions at higher levels
> Press the D button ©).
Opening and closing the menu
» Press the [=] button ©).
Selecting and confirming a function
Requirement: a menu or list must be displayed.
> To select a function, turn the left thumbwheel
@ to the desired function.
> To confirm a selection, press the left thumb-
wheel (7).
Switching the view
> Press the VIEW button @) > page 13.
The following tabs may be available, depending
on vehicle equipment:






First tab Vehicle functions > page 16
Second tab | Driver messages (this is only dis-
played if at least one indicator
light/message is being displayed)
Third tab Radio > page 193
Media > page 203
Fourth tab | Telephone > page 166
Fifth tab Navigation > page 181

Adjusting the display
RAZ-0673
Applies to: Audi virtual cockpit
Fig. 6 Center display: adjusting the display
Switching the view
Applies to: Audi virtual cockpit
> Press the VIEW button to switch between the
default view @ and the enhanced view (2).
13

Instrument cluster

Adjusting the layout
Applies to: Audi virtual cockpit
Depending on the vehicle equipment, various lay-
outs may be available.
> Applies to: MMI: Select on the home screen:
SETTINGS > Display & brightness > Audi virtu-
al cockpit.
> To adjust the desired layout, press @).
Adjusting the additional display
Applies to: Audi virtual cockpit
Depending on the vehicle equipment, the addi-
tional displays that can be selected may vary.
> Applies to: MMI: Select on the home screen:
SETTINGS > Display & brightness > Audi virtu-
al cockpit > Configure.
> Select the desired additional display.
Reducing the display
Depending on the vehicle equipment, you can
hide the central area in the instrument cluster.
> Select on the instrument cluster: vehicle func-
tions tab > [=] button > Reduced display, or
> Press the VIEW button on the multifunction
steering wheel.
Coolant temperature
display
Applies to: vehicles with a coolant temperature indicator
The coolant temperature display @) > page 12
only functions when the ignition is switched on.
To reduce the risk of engine damage, please ob-
serve the following notes about the temperature
ranges.
Cold range
If only the LEDs at the bottom of the gauge turn
on, the engine has not reached operating tem-
perature yet. Avoid high engine speeds, full accel-
eration, and heavy engine loads.
Normal range
The engine has reached its operating tempera-
ture once the LEDs up to the center of the gauge
turn on. If the | indicator light in the instru-
14
ment cluster display turns on, the coolant tem-
perature is too high > page 227.
() Note
— Auxiliary headlights and other accessories in
front of the air intake impair the cooling ef-
fect of the coolant. This increases the risk of
the engine overheating during high outside
temperatures and heavy engine load.
— The front spoiler also helps to distribute
cooling air correctly while driving. If the
spoiler is damaged, the cooling effect will
be impaired and the risk of the engine over-
heating will increase. See an authorized
Audi dealer or authorized Audi Service Fa-
cility for assistance.
Tachometer
The tachometer @) > page 12 displays the engine
speed in revolutions per minute (RPM). The be-
ginning of the red zone in the tachometer indi-
cates the maximum permissible engine speed for
all gears once the engine has been broken in. Be-
fore reaching the red zone, you should shift into
the next higher gear, select the "D" or "S" selec-
tor lever position, or remove your foot from the
accelerator pedal.
Engine speed limitation
If the tA indicator light turns on, the engine will
be automatically limited to the RPM displayed in
the instrument cluster. This will protect the en-
gine components, for example during a cold start
or from overheating.
The engine speed limitation is deactivated if you
release the accelerator pedal while the engine is
at normal operating temperature.
If the engine speed limitation was activated by
an engine control malfunction, the By indicator
light also turns on. Make sure the engine speed
does not go above the speed displayed, for exam-
ple when downshifting. Drive to an authorized
Audi dealer or authorized Audi Service Facility im-
mediately to have the malfunction corrected. >

8W1012721BC
Voice recognition system

> To pause voice recognition, say or press Pause
@). To reactivate voice recognition, press ()
again or briefly press the «€ button on the mul-
tifunction steering wheel.
Additional functions
Applies to: vehicles with voice recognition system
Command during voice output
If the function is switched on, you can simply say
a new command during a prompt.
> Applies to: MMI: Select on the home screen:
SETTINGS > General > Speech dialog system >
Allow commands during voice output.
Online recognizer
Applies to: vehicles with online recognizer
You can activate the online recognizer for addi-
tional functions and to improve the results of
voice recognition. A supported menu language
must be selected. When there is an active Inter-
net connection, the spoken command is evaluat-
ed in the vehicle and online.
> When you switch on the voice recognition sys-
tem for the first time, a menu for the online
recognizer will open, or
» Applies to MMI: Select on the home screen:
SETTINGS > General > Speech dialog system >
Consent to online speech recognizer.
> Read the licensing agreements and accept
them.
Amazon Alexa
Applies to: vehicles with Amazon Alexa Integration
You can activate Amazon Alexa to access certain
functions. A reduced number of commands for
Amazon Alexa are available during this.
Requirement: you must be logged in to your
myAudi account in the vehicle. The online recog-
nizer must be activated. A system language that
is supported by both the voice recognition system
and Amazon Alexa must be selected.
> Applies to: MMI: Select on the home screen:
USER > Connect to Amazon Alexa.
> Follow the instructions in the display.
>» Applies to: MMI: To operate Amazon Alexa us-
ing voice commands, select on the home
screen: SETTINGS > General > (Speech dialog
system) > Activate the speech dialog system
with "Hey Audi".
>» Say the activation phrase “Alexa” together with
the desired command.
() Note
Read the information about Audi connect, and
be sure to note the connectivity costs section
=>@ in General information on page 173.
@ Tips
Audi provides access to services from third
party providers. Permanent availability cannot
be guaranteed, because that depends on the
third party provider.
External voice operation
Applies to: vehicles with external speech dialog system
You can access and control the voice operation on
a connected mobile device through your vehicle.
Switching external voice operation on or off
Requirement: the ignition and the MMI must be
switched on. A cell phone must be connected to
the MMI with the Handsfree profile > page 162.
The mobile device being connected must have
voice control that can be controlled externally.
There must be no phone calls in progress and the
parking aid must not be active.
> To switch on the external voice operation, press
and hold the «€ button longer on the multifunc-
tion steering wheel.
> To switch off the external voice operation, press
and hold the «€ button longer on the multifunc-
tion steering wheel or press Cancel.
Using external voice operation
» Say the desired command after the signal tone.
> To reactivate voice recognition when it is
paused, press the w£ button briefly on the mul-
tifunction steering wheel or press Resume.
@) Tips
Audi simply provides access to control your
cell phone with voice operation and does not
27
>

8W1012721BC
Global functions

Global functions
Additional function
buttons



[RAz-0846]

[
Fig. 22 MMI On/Off knob with joystick function
Adjusting the volume
You can adjust the volume of an audio source or a
system message (for example, from the voice
recognition system) when the sound is playing.
> To increase or decrease the volume, turn the
right
thumbwheel @) © fig. 21 upward or
downward, or turn the On/Off knob > fig. 22 to
the right or left.
> To mute, push the right thumbwheel or the
On/Off knob.
Selecting the previous/next track or station
> Press the d the On/Off knob to the left/right.
Fast forward/rewind
> Press and hold the l press the On/Off knob to the left or right until
the desired playback position is reached.
Quick access steering wheel button
Depending on vehicle equipment, the button @)
may provide quick access to various functions.
> & button, see > page 93.
You can program the >K button with various func-
tions.
> To bring up the function that is currently set,
press the * button.
> To perform the function that is currently set,
press and hold the >K button, or:
> Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Steering wheel
button assignment.
> Select and confirm the desired function.
Switching voice operation on or off
«€ button @, see > page 26.
Using the telephone functions
button @, see > page 168.


Adjust the volume of the audio system so that
signals from outside the vehicle, such as po-
lice and fire sirens, can be heard easily at all
times.

29

Personalization

Personalization
Users
(eT e e eeu)
Applies to: vehicles with personalized user settings
Depending on vehicle equipment and your coun-
try, your vehicle may be able to manage various
users in the MMI. Each user will be assigned the
settings that they last used.
Before you begin driving, you can select a user in
the MMI and load personalized Infotainment and
vehicle settings.
Possible users in the MMI:
— myAudi user: as a myAudi user, you can use
Audi connect services that require a myAudi ac-
count. Certain settings are transferred online to
your myAudi account. If you log into your
myAudi account in another vehicle, you can
load your settings in the other vehicle.
— Local user: as a local user, you can only store
settings in the current vehicle. Your settings
cannot be transferred to other vehicles. Audi
connect services that can only be used with a
myAudi account will not be available.
— Guest: as a guest, you can store settings in the
vehicle without changing the settings for other
users. Audi recommends only using the guest
user temporarily, because settings can be over-
written by other users.
Depending on vehicle equipment, the following
options may be used to detect the active user so
that the user settings can be loaded automatical-
ly before you start driving.
— Vehicle key
Requirement: the driver's door has been opened.
The detected user must be shown in the MMI.
Confirm the user shown, select another user
= page 30, or add another user > page 30.

ZA\ WARNING
It may not be possible to load Infotainment
and vehicle settings, or they may only load
partially. The driver is always responsible for
the Infotainment and vehicle settings in order
to reduce the risk of an accident.

30
G) Tips
— Certain Infotainment and vehicle settings
(such as mirrors, last radio stations) may be
stored, depending on vehicle equipment.
You can find additional information in the
MMI. Select on the home screen: SETTINGS
> General > Legal notes > About Audi con-
nect.
— Applies to: myAudi users: The stored set-
tings can only be transferred to vehicles
that are capable of receiving the transmit-
ted information. There may be restrictions
that prevent this, particularly in other coun-
tries.
— Applies to: myAudi users: The settings can
only be transferred and loaded when there
is coverage from the applicable mobile
phone service provider.
— Applies to: myAudi users with PIN protec-
tion switched on: If the MMI displays a de-
tected user but you simply start driving or
wait without entering the 4-digit PIN, then
the guest user will be selected. Some set-
tings for the detected myAudi user will be
transferred to the guest user.
OTe le le (a4
Applies to: vehicles with user management
Opening user management
Applies to: MMI
> Press USER on the home screen.
Selecting a user
Applies to: MMI
> Press on the desired user.
> Enter the 4-digit myAudi PIN, if necessary.
Adding myAudi users
Applies to MMI and Audi connect
Requirement: you must have successfully regis-
tered at my.audi.com and have created a 4-digit
myAudi PIN.
> Press Add user.
> Press Log in now to log in with your myAudi
credentials.
> Follow the system instructions.