2020 AUDI A4 differential

Driving dynamic

All wheel drive (quattro)
Applies to: vehicles with all wheel drive
The all-wheel drive system distributes the driving
power variably to the front and rear axle to im-
prove the driving characteristics. It works togeth-
er with selective wheel torque control, which can
activate when driving through curves
=> page 109.
Applies to: vehicles with quattro ultra: If the driv-
ing situation does not require all wheel drive,
then the rear section of the drivetrain will decou-
ple to save fuel. The system constantly deter-
mines and anticipates if all wheel drive is needed.
This allows the rear drivetrain to recouple shortly
before it is needed.
The all-wheel drive system is designed for high
engine power. Your vehicle is exceptionally pow-
erful and has excellent driving characteristics
both under normal driving conditions and on
snow and ice. Always read and follow safety pre-
cautions > A.

ZX WARNING
— Even in vehicles with all wheel drive, you
should adapt your driving style to the cur-
rent road and traffic conditions to reduce
the risk of an accident.
— The braking ability of your vehicle is limited
to the traction of the wheels. In this way, it
is not different from a two wheel drive vehi-
cle. Do not drive too fast because this in-
creases the risk of an accident.
— Note that on wet streets, the front wheels
can “hydroplane’” if driving at speeds that
are too high. Unlike front wheel drive
vehicles, the engine RPM does not increase
suddenly when the vehicle begins hydro-
planing. Adapt your speed to the road condi-
tions to reduce the risk of an accident.
Sport differential
Applies to: vehicles with sport differential

The sport differential distributes the drive power
to the rear axle based on the situation. The goal
108
is a high level of agility and ability to accelerate
on curves. The vehicle is very responsive to steer-
ing. The settings depend on the selected Audi
drive select* mode.
it} All wheel drive: malfunction! You can con-
tinue driving. Please contact Service
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
it} Sport differential: malfunction! Please con-
tact Service
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
it} All wheel drive: too hot. Please adapt driv-
ing style. See owner’s manual
The transmission temperature has increased sig-
nificantly due to the sporty driving manner. Drive
in a less sporty manner until the temperature re-
turns to the normal range and the indicator light
switches of.
it} Sport differential: temperature too high.
Please adapt driving style
The transmission temperature has increased sig-
nificantly due to the sporty driving manner. Drive
in a less sporty manner until the temperature re-
turns to the normal range and the indicator light
switches of.

ZA WARNING
Contact an authorized Audi dealer or author-
ized Audi Service Facility if the sport differen-
tial is faulty or malfunctioning. The repair
must be performed by trained personnel us-
ing the correct oil in order to ensure safety.

8W1012721BB
Driving dynamic

Electronic Stabilization
Control
Electronic Stabilization Control (ESC) supports
driver safety. It reduces the risk of slipping and
improves driving stability. ESC detects critical sit-
uations, such as if the vehicle is oversteering or
understeering, or if the wheels are spinning. The
brakes are applied or the engine torque is re-
duced in order to stabilize the vehicle.
If the BB indicator light blinks while driving, the
ESC is actively regulating.
If the BB indicator light turns on, the system has
switched the ESC off. In this case, you can switch
the ignition off and then on to switch the ESC on
again. The indicator light turns off when the sys-
tem is fully functional.
If the B indicator light turns on, ESC was limit-
ed or switched off manually > page 110.
The following systems are integrated in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking when brak-
ing. The vehicle can still be steered even during
hard braking. Apply steady pressure to the brake
pedal. Do not pump the pedal.
A pulsing in the brake pedal indicates that the
system is acting to stabilize the vehicle.
Brake assist
The brake assist system can decrease braking dis-
tance. It increases braking power when the driver
presses the brake pedal quickly in emergency sit-
uations. You must press and hold the brake pedal
until the dangerous situation is over. Depending
on the activated driver assistance systems, the
brake assist system may react with increased sen-
sitivity.
Anti-Slip Regulation (ASR)
ASR reduces drive power when the wheels begin
spinning and adapts the power to the road condi-
tions. This will increase the driving stability.
Electronic Differential Lock (EDL)
The EDL applies the brakes to wheels that are
slipping and transfers the drive power to the oth-
er wheels. This function is not available at higher
speeds.
In extreme cases, EDL automatically switches off
to keep the brake on the braked wheel from over-
heating. The vehicle is still functioning correctly.
EDL will switch on again automatically when con-
ditions have returned to normal.
Power steering
The ESC can also support vehicle stability
through steering.
Selective wheel torque control
Selective wheel torque control is used when driv-
ing on curves. Braking is targeted toward the
wheels on the inside of the curve as needed. This
allows more precise driving in curves.
Automatic post-collision braking system
The automatic post-collision braking system can
help to reduce the risk of sliding and of addition-
al collisions after an accident. If the airbag con-
trol module detects a collision, the vehicle is
braked by the ESC.
The vehicle does not brake automatically if one of
the following occurs:
— The driver presses the accelerator pedal, or
— The braking force generated by the pressed
brake pedal is greater than the braking force
that would be initiated by the system
— The ESC, the brake system, or the vehicle elec-
trical system is not functioning

Z\ WARNING
— The ESC and its integrated systems cannot
overcome the limits imposed by natural
physical laws. This is especially important on
slippery or wet roads. If the systems begin
acting to stabilize your vehicle, you should
immediately alter your speed to match the


109

Fuses and bulbs


Fuse panel © (brown)
No. | Equipment


Telephone, mobile device charging func-


AN WARNING
If you still would like to try replacing the
bulbs in your vehicle yourself, read the warn-


6 |Tire pressure monitoring system
7 |Vehicle opening/start (NFC)
Auxiliary heating radio receiver, smart
module (fuel tank)



10 |TV tuner, gateway

11 | Auxiliary battery control module

12 | Garage door opener

13 | Rearview camera, peripheral cameras
14 | Right tail lights
16 | Right safety belt tensioner


Fuse panel (E) (red)
No. | Equipment


Exhaust treatment
Trailer hitch (right light)
Trailer hitch
Trailer hitch (left light)
Trailer hitch (socket)
10 |Allroad sport differential
11 | Exhaust treatment




Wl)
OIN|
Mm]
w


Bulbs
Replacing bulbs
Having a bulb replaced by an authorized Audi
dealer or authorized Audi Service Facility in cases
of doubt is recommended. These facilities have
the correct tools and replacement parts as well
as the required technical knowledge.
LED lights*
Your vehicle is equipped with maintenance-free
headlights and tail lights. However, if a light bulb
needs to be replaced, please contact an author-
ized Audi dealer or authorized Audi Service Facili-
ty.
268
2 |,
tion ings regarding working in the engine compart-
3 Right front seat electronics, lumbar sup- ment > A\ in General information on
port page 214.
4 |Side assist
@) Note
Make sure the covers are fitted correctly on
the headlight and tail light so that no water
will leak in from the outside and the light
function will not be impaired.

Index


Driving:down HWS: sccies 2 vives ev eee = 2 eevee 104
Driving programms « «sisi. & 2 owes a 0 wasn 2 2 ime 133
Driving through water...............005 105
DIIVIGSCUTISss « = eee x & eee « nanewE s eRe a se LS
Driving tips
Driving through water................- 105
Efficient driving
Offroad driving....
Uphilland downhill. « & ssceiie ee cvawise wo sway 104
Driving up hills:; ; « s0«s : 2 sees se eee = 2 es 104
Dust filter
refer to Pollutant filter..............0.. 87
DYNAMISStEETING « wes ¢ v mews 2 exes 6 were 107
E
E-mail
Message:Optiomstan. + + ssc a 6 seca w 6 ossen 167
Settings........ 0.0... cece eee eee 167
EDL
refer to Electronic Differential Lock...... 109
EDR
Event Data Recorder iis ss ccs scana es 269
Efficiency BSSisties « a cawy xv wows vv maw a es 124
Electrical SySte@il's s s sees ¢ 2 exes i rama i re 222
Electromechanical parking brake......... 102
Electronic Differential Lock.............. 109
Electronic immobilizer.............00000. 34
Electronic Stabilization Control........... 109
Embedded SIM ear « essicscs os soci v a ssteine wo 0 170
Emergency assistance wcscs os caw s eeea a eo 253
Emergency braking function............. 103
Emergency Callies s & css s ¢ weiss s nae 165,174
Emergency flashers...............000005 50
Emergency mode......... 02. eee eee 97
Emergency operation
DOOIS « snay ¢ © agay ae eee aH eee 2 He gE 32
Fuelsilleridoorin: « suiccs ov saws x aracne <0 ans 213
Luggage compartment lid............... 40
Panoramic glass roof................--. 44
Sliding/tilting SUNTOOF wos... vee se eon ss 43
Emissions control system..............- 213
Energy CONSUMEIS:: « s svse so ee ee Hewes ewe 15
Energy management.................085 99
282

Engine
Breakingin....... eee eee eee eee eee ee 98
GOOlaNE 2 snow 4 « meay ¢ e meme 2 x eee d RoE 220
Emiengeney tpt 3 seas vx wns o siemens a ¥ a 92
Jump starting. ......... 0. cee eee eee 260
Start/Stop system............--000 eee 99
Starting/Stopping wc « «esse se enews wees 92
Engine compartment
Opening and closing the hood.......... 215
Overview... .... 2. eee eee eee 216
Safety precautions..............0e00es 214
Engine oil
AGING o cweses oo eeeirece a emeners aw onemeiee vw eeSoes
Changing
Checking oil level... sca ss yeen ee reuse: 216
CONSUMPTION bss ¢ & saves & o ceawers © 8 ere 6 0 ws 216
Indicator light..............00.000 00 217
Replacement interval................. 226
Temperature display................... 14
Engine sound
Audi drive select.............002-.00. 106
Engine Start/Stop mode
refer to Start/Stop system............55 99
Engine start system.............000 000s 93
Engine stop
refer to Start/Stop system.............. 99
Entry/exit lighting..............0.-.. eee 50
Entry assistance ....... cece eee eee eee ee 62
also refer to Exit assistance............. 62
Environment
Unleaded gasoline................200. 210
ESC Offfad sec so seus 5 vere so eae ov os 110
ESC Sport.............0 0.00.0 .000000. 110
eSIM
refer to Embedded SIM card............ 170
Event Data Recorder (EDR).............. 269
Exit assistance... 2... eee eee eee eee
Exit warning..............0..0.0000005
Exterior antenna...............0..000.
Exterior lighting.................022-00
EXCe@niO MIPKONS secs ws wasos © w cess vem a OY
Folding settings

External voice operation................. 25

8W1012721BB

Speed limit information
refer to Traffic sign recognition......... 118
Speed limits
refer to Traffic sign recognition......... 118
Speedometer......... cece eee ee eee 1d,
Speed warning system..............0005 118
Sport differential..............00220008 108
Start/Stop system. .......-...0-.00 ee eee 99
Switching offandon..............000- 100
Starting to drive... ... eee eee eee 93.
Starting (EMGIME)'. . scssese a» wecnse sw apecmae 9 & exe 100
SECOTING . cassene x susows @ eneass a @ stetaie w & ne 107
Audi drive select. ............0 eee e eee 106
also refer to Steering...............55 107
Steering lock: « s saeg ss eae sv pees se eeR ees 92
Steering wheel
AGJUStING!a: « 9 seovos x 3 waxsu a ¢ Hawes 3 2 Bem 4 62
Adjusting manually..................0- 62
Shift
paddles.......... 00... cece sees 96
Steering wheel heating................. 90
also refer to Multifunction steering wheel. . 12
Steps for determining correct load limit... 241
Stopover (navigation) .................. 180
Stopping (ENGIN) ax « = was = 2 eevee 3 « swe s & 100
StOrage areas: = case « = ems sy ewe FE RE Be 78
Stored stations
refer to Presets. « 2 oxo oe aww oo coe vo 190
Sunshade
ReardOorst. « avers s 1 ana w a aumvens 0 0 amine © 6 54
ROOF... eee ee 44
SUN VISOFS 2... eee ee eee 54
SUSPEASION) csr 6 6 ccesere & 6 esennire & presen a 6 stenonts 106
Audi drive select.......... 0.0 eee eee 106
Swapping calls.............-.00022000e 164
Swerve assist... 2.0... e eee eee eee 142
Symbols
Navigation... 0.0.0... 0... e cece ee eee 180
UratfiGws = s wows ss wewe : eens t see cs ee 185
also refer to Indicator lights.............. 7
SYNG (Button) « 0 seen oo snen on onan wo cmon x 89
SYSECMTSELLINGS senses oo cases oo sees o wee» 206
T
Tachometer es s ¢ oases se mewn 2 x qawe 2 nae 11,13
Tail lights
Cleaning « x ccsiese i a scene x = suenens 4 x semcwre wo ome 248
Techriicalidatais © « swivis w sswersse « wees 2 e coe 277
Technical modifications................. 272
Telephone’: « ¢ saws = + sews os eee oe ews ee 158
Accepting/ending acall................ 164
Audi phone box........ 0... e ee eee eee 160
Charging the battery (USB)............. 160
Charging the battery (wireless)......... 160
Connecting a mobile phone............ 158
Diglinig ANUMBEr: « caus « gaan ss pews ae ee 164
Exterior'antennass «+ sccscs ae anne a i atiome a a 160
Mobile device reminder signal.......... 161
Options during aphonecall............ 164
Playing Musi¢ sven «0 ven oe ence omen ve 195
Temperature display (outside temperature) .. 14
Temperature gauge
COOLAME cassie» 5 cxcowms 5 0 esemns 4 0 omnis a 8 ee & 11
TeXtINPUt sss 3 6 cw oo wee oo een oo oe 21
Text messages
SettingS 0.0... 0. cece eee eee eee eee 166
Text messaging settings............... 166
also refer to Text messages............ 166
TiesdOWiS's = saves 5 « ees 3 2 cess ce eae «Fae 84
Tightening specification
Wheel Doltstin so icnasi s 2 aasn <0 mason © svann 258
Tightening specification (wheel bolts) .... . 258
Ti@s: = worms < 5 eeu 2 ¢ ews ge eee Fo ee zs 15
tiptronic
refer to Manual shifting................ 96
Tire Mobility System (tire repair set)....... 253
Tin@S « wee ¢ & wea & Goes x eR ge ROR a 2 227
GRANGIAG' ie = soci 2 eranenss e mweeee a meee 2 255
Low-profile tires. .............00 0-0 ee 243
Repainisets ; swe : seen os een ¢ 5 em vb 253
Senvice liferces < viva + wean @ + sae wo eave 236
Tire pressure... 2... eee eee eee 237
Tire pressure monitoring system.... 244,245
Tire pressure table..................-. 239
Tire pressure (trailer mode)............ 112
Treadwear indicators.................. 236
Uinidireetioniale: « = exces 22 ween 2 ¢ eeem 229, 258
Uniform tire quality grading............ 243
Tires and wheels
Glossary of tire and loading terminology .. 230
Tires and vehicle load limits............ 240
TOO Sissi: ¢ 2 czas ¢ aes 2 Gee EX Ream FE eee 253
Top tether anchor (securing the child safety
S@at)'s « v saws y # ows ¥ 0 eww ey coo Se ED a YY 76
289