2021 AUDI A4 belt

Accessories and technical changes

Usually maintenance and repair work requires
special tools, measuring devices, and other
equipment that is available to trained vehicle
technicians in order to help ensure that your vehi-
cle and all of its systems operate correctly, relia-
bly, and safely. Performing work on the vehicle
incorrectly can impair the operation and reliabili-
ty of your vehicle and may void one or more of
your vehicle's warranties.
Technical Modifications
Interference with electronic components, their
software, the wiring, and data transfer may cause
malfunctions. Because of the way electronic com-
ponents are interconnected, such malfunctions
can also impair systems that are not directly in-
volved. This means that you risk both a substan-
tial reduction in the operational safety of your ve-
hicle and increased wear of vehicle components.
Some convenience functions, such as the conven-
ience turn signal function, individual door open-
ing function, and displays, can be reprogrammed
using special workshop equipment. If functions
are reprogrammed, the information and descrip-
tions about these functions in this Owner's Man-
ual may no longer apply to the changed func-
tions. Audi recommends that an authorized Audi
dealer or authorized Audi Service Facility perform
and verify any reprogramming procedures.


— 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 improperly per-
formed work.


ZA\ WARNING
Maintenance work, repairs, or technical modi-
fications to the vehicle (such as installing ad-
ditional equipment) that is not performed
correctly can cause serious injuries and in-
crease the risk of an accident.


Z\ WARNING
The engine compartment in any motor vehicle
is a potentially dangerous area and can cause
serious personal injury.
— 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.

282
@) Note
— Maintenance work, repairs, or technical
modifications to the vehicle (such as instal-
ling additional equipment) that is not per-
formed correctly can cause vehicle damage.
— If emergency repairs must be performed,
take your vehicle to an authorized Audi deal-
er or authorized Audi Service Facility as soon
as possible.
— Audi is not liable for damage to the vehicle
resulting from failure to comply with these
guidelines.
@) For the sake of the environment
— Regular maintenance can help protect the
environment.
— Technical modifications to the vehicle can
have a negative impact on fuel consumption
and vehicle emissions.
@) For the sake of the environment
Certain components in your vehicle such as
undeployed airbag modules, pretensioners
and remote control batteries may contain Per-
chlorate Material - special handling may ap-
ply, See www.dtsc.ca.gov/hazardouswaste/
perchlorate. When the vehicle or parts of the
restraint system including airbag modules
and safety belts with pretensioners are scrap-
ped, all applicable laws and regulations must
be observed. Your authorized Audi dealer is
familiar with these requirements and we rec-
ommend that you have your dealer perform
this service for you.

8W1012721BC
Index


Battery
Charging (12 Volt vehicle battery)....... 232
Vehicle battery (12 Volt)............... 230
Winter operation (12 Volt vehicle battery) . 231
BLOCK POU cei: «x were: oo ceamewe oo semen 2 o seems 187
BLOWN: sess: ¢ = seene « x wanes g 2 meee 5 2 ee 4 ee 92
Bluetooth
Audio playen snus « 2 sassws ae suesens ov srw 9 2 3 201
Connecting adevice..............0000- 214
Connecting a mobile phone............ 162
Deleting a device
Device overvieW............00-.0 eee
Disconnecting a device................ 214
Displaying profiles..................0. 215
Selecting adevice.............0..000. 214
Specifying a favorite.................. 215
Boost... 6... eee eee eee 15
Boost pressure indicator................. 15
Brake fluid
Checking the brake fluid level........... 229
BrakeS.. 0... eee eee 104
Brak@fluid(: = = sams = « eam = woven se pee as 229
Emergency braking function............ 106
0) 107
New brake pads............. 00s e eee 104
Braids « savay » © aaiwa & Raeoe ¢ & SanDR ES Se ES 216
Break-in security feature............00005 36
Breaking in
New brake pads..............----000- 104
NeWetiresis « wcuin as maces a meme a 2 emma ee 242
Browser
refer to Media center...............00. 204
Businessiaddressis i s, svessns sc scan a a veamiws a aa 187
c
California Proposition 65 Warning........ 222
Battery specific...............00-0 00 231
GALLUISE sacsse + ogsiese 0 9 axons 0 4 exexeus 4 2 anneew a 166
Cameras
Coverage areaS............-.0. 000000. 118
LOGAUIONS a: « ¢ apes ¢ nates 3 paee 5 x PEER GE 119
Capacities
Puelitankss sss so somes a sess @ o aves ¥ 0 ond 287
Washer fluid reservoir................. 287
Garwashh x 5 sews « onsmeus © scagens os ayers «6 @ some 255
Gatalytic converter « sis 2 weve eo wee ee cree 220
Cell phone
refer to Telephone............00 eee eee 162
Cell phone compartment
refer to Audi phone box............... 164
Central locking...... cece eee cree eee 33
AULOILOGK « coos 2 5 seme 5 5 ete so wows Go eG 33
Convenience key sie © « socsais 2 6 srvoem + 6 voese 38
Convenience opening and closing......... 46
Luggage compartment lid............... 4l
Mechanically unlocking and locking....... 36
MessageS ......--. 0c cece eects 35
Remote control key........:0ee eee ee eee 38
SEUNG’: © wave: s 2 wecems ve arene @ aetna ¥ ewee 34
Vehicle key... 0... cece eee ee eee ee 38
Central locking switch..............0000. 35
Ceramic Drakesinis © «cassie © x seve ¥ @ suena # ane 104
Certification): « . cee: ss wean ov enw os eee « 284
Charging
refer to Power sourceS..........-.000005 82
Charging the battery
Mobile devices..................00005 202
USB': « meme 2 ¢ anus © naueu & x REINS & ¥ ORE & 165
Witelessis «secs x x woos 2 v cervaue a x stone 2 9 oon 165
Child safety lock
Climate control system controls in the rear. 44
POWEr WINDOWS! si: = © xsnas 4 § Seen & & Maram 4 es 44
Rear dOOrsis + o omc sc sami oo me oases 44
Child safety seats..............---.00005 76
Securing to the top tether anchor........ 80
Securing with a safety belt.............. 79
Securing: with LATCH s « sw « & nome « ¢ sans « 78
ClEATIAG saves 5 x nore 5 2 wows ot eee xe eee 255
Cleaning Alcantara.............-.00000. 258
Cleaning artificial leather............... 258
Cleaning carbon components........ 257, 258
Cleaning controls..................005. 258
Cleaning decorative parts andtrim........ 257
Cleaning exhaust tail pipes.............. 257
Cleaning plastic parts...........00 eee 257
Cleaning textiles = cass ¢ & exes ¢ cae se ees 258
Climate control system ............00000- 90
also refer to Automatic climate control sys-
GNA. 2 execs © 2 ceeueve = ueueat © + steams © meme = © 90
Climate control system controls in the rear
Child safety lock........... 0. cece eee 44
289

8W1012721BC

Removing the caps (wheel bolts)......... 264
ROP alts sass 2 2 mais o eaten w & wee we ONC oe 281
Replacement key........ cece eee eeee eens 37
Replacement parts’ « exw « « ques yo eawes x oe 283
Replacing bulbs a. = ssws st eee ee ewes ees 276
Reporting Safety Defects................ 283
Reverse gear
WEfEF LO GESTS savas sy euaw co wees co wee a 97
Reversible cargo floor..............0000e 88
RIMS 2... eee ee 250
Cleaning = « sss + © seovs 3 & sees to ews ee oe 257
ROUING’s = wanes « ween os woe eo Ree ee BeeE Ye 96
Rolling ability
Electromechanical parking brake........ 106
Transmission idley. . 5 sso + saene oo siecaun oa an 98
Roof
refer to Panoramic glass roof............ 47
Roof load. ...........2.. 020222 e eee eee 287
ROO FAG cece sxcuens ao manor a w amante « oxewemnce «ate 88
also refer to Roof rack..........-...0-4. 88
Route guidance
StOPPING swe = ones ¢ ¥ Hee se carey o 2 SOS 185
also refer to Navigation............... 181
Running direction (tires)..............-. 266
S
Safety beltSies x » saws x 2 uae ¢ ¢ mew 2» REwH 6 2 68
Cleaning.......... 0. ec eee eee eee 258
LOCKING... 6.6.6 c cece eee eee 79
Securing child safety seats.............. 79
Satellite Map seve ss wees 2 o ees 7 e owe es 188
Saving fuel
Energy CONSUMEeMSisscs so sxe v waar a 9 were 16
Recuperation........ 00. c eee eee eee ee 16
Screen
refer to Touch display...............-.. 17
Screwdriver ........ 0.00. cece eee eee 261
Search function
refer to Free text search............... 206
Seat heating............. ee eee eee eee 92
Seats
ACJUStING as: « 2 ems « 2 weaw § § see FE wR Fe 64
Cleaning « « cia se even eo one oo ae oo os 258
Folding the rearseats............... 85, 86
Head feStraints): « sass ¢ « maven ss sane ¢ ¢ ners 67
Memory function « ses + 2 vei se eens see 71

Resetting the position.................. 65
Storing a seat profile...............000. 71
Seat ventilation....................000. 92
Securing the vehicle...............0.-00. 96
Selecting a source (media).............. 203
Selector lever. « o svvne 2 x wos 2 x ames w a anes & 97
Selector lever position
WEPFEPTOLGCATS « sere ao ammraye «a sma omens © 97
Sensors
Coverage areaS... eee eee eee 118
LOGatiOnS =< < sacs ¢ + seem & s wows ey eee 2 119
Service interval display................. 233
SET REAR (button).............00000000e 92
Setting measurement units.............. 212
SettingS ..... 0... eee eee eee eee eee 212
Announcements and tones............. 212
BlUGtOOthis « 2 sss + wese s + wow x 5 Hern gee 213
Daterand time < s ecine « 2 ovens w 5 xneee 3 3 212
Language
Measurement units.................-. 212
Media... .. eee eee eee eee 207
Navigation...........0..0..0.002 eee 191
RadiGiecy: x » swe sv mee 4 e cow & yee £ ee 199
SOUMG rsx « & ssexine 6 1 aveveus wo ecicens o eneN Bo 212
SysteM . 2... ee eee 212
TiMe/ZONCcas « x mewe 7 2 aoe ¢ Hom ae BERR 212
WiItFi OtSPOt eneves oo coevene oe cress wo creer vo 176
Setting the language................... 212
Setting the time's « « saws ve ees ve cee vo 212
Shift paddles-sies < y esas ¢ weeew y ween ss ewe 99
SHGprs « s seams © o EtOH 7c REGS FOE ROR EE ese = 175
Shuffle... 2... eee eee eee 205
Side assist... 0.6... eee eee eee ee 147
Cleaning the sensors...............-.. 256
SIMiGard's sasan 3 4 case ¢ s BGG Te Rew FB eR 174
Sliding/tilting sunroof...............005- 46
Emergency closing...........--+eeeeeee 46
SUMSH AGES swims wa ssanave ox somcene @ x aeauawe ww sean 46
also refer to Panoramic glass roof........ 47
Smart Favorites
pefer to Presets ex « « ewan se een ce eee ee 196
Smartphone
refer to Telephone...........-seeee0e: 162
STOW CHAINS): « 2 qs a 2 ews a @ eee a x ReE x 251
Socket
refer to Power sourceS..........--.20-05 82
297