2021 AUDI S4 torque

Driving dynamic

There is a malfunction in the electronic steering
lock. Drive immediately to an authorized Audi
dealer or authorized Audi Service Facility to have
the malfunction repaired.
Dynamic steering: correcting steering wheel
position
The steering is reinitializing. The steering wheel
will move easily after starting the vehicle. Reiniti-
alization might be necessary if the steering wheel
was moved while the engine was switched off.
The display turns off if the initialization was suc-
cessful.

ZA\ WARNING
Do not tow your vehicle if there is a malfunc-
tion in the electronic steering lock because
this increases the risk of an accident.
@) Tips
— If there is a malfunction, the steering wheel
may be crooked when driving straight.
—Ifthe Ba or fal indicator light only stays on
for a short time, you may continue driving.

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 113.
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
112
snow and ice. Always read and follow safety pre-
cautions > A\.

ZA 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.
Sy amet
Applies to: vehicles with sport differential

The sport differential distributes the drive power
to the rear axle based on the situation. The goal
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.
WEE Tel
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

8W1012721BC
Driving dynamic

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.

Z\ 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.

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.
The following stabilization functions are integrat-
ed into the ESC, among others:
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.
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.
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.
Power steering
The ESC can also support vehicle stability
through steering.

ZA\ 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
road and traffic conditions. Do not let the in-
creased safety provided tempt you into tak-
ing risks. This could increase your risk of a
collision.
— Please note the risk of a collision increases
when driving fast, especially through curves
and on slippery or wet roads, and when driv-
ing too close to objects ahead. There is still
a risk of accidents because the ESC and its
integrated systems cannot always prevent
collisions.
— Accelerate carefully when driving on
smooth, slippery surfaces such as ice and

snow. The drive wheels can spin even when

113

8W1012721BC
Checking and Filling

Checking and Filling
Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
The individual gasoline grades are differentiated
by octane ratings. This value is given with (R
+M)/2 equating to AKI or in RON.
The headings below match the sticker in the fuel
filler door (examples):
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular / MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI /
91 RON > ©.
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
Using premium gasoline with minimum 91 AKI /
95 RON is recommended.
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 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.
CG) Note
— Filling the tank just one time with leaded
fuel or other metallic additives will cause
permanent deterioration to the catalytic
converter function.
— When gasoline with an octane rating that is
too low is used, high speeds or heavy engine
load can lead to engine damage.
@ Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine.
Gasoline mixture
Gasoline with alcohol or MTBE (Methyl-Tert-
Butyl-Ether)
You can use unleaded gasoline mixed with alco-
hol or MTBE (generally labeled as oxygenated
compounds) as long as the fuel meets the follow-
ing conditions:
Gasoline with methanol content (methyl alco-
hol or methanol)
— Anti-Knock Index is at least 87 AKI
—No more than 3% methanol
— More than 2% solvent
Gasoline with ethanol content (ethyl alcohol or
ethanol)
— Anti-Knock Index is at least 87 AKI
—No more than 15% ethanol
Gasoline with MTBE content
— Anti-Knock Index is at least 87 AKI
—No more than 15% MTBE
Gasoline adapted to the season
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.
@) Note
— Gasoline with methanol content that does
not meet the specified conditions may cause >
217

Emergency assistance

> Set the parking brake.
> Select the “P” position.
>» When towing a trailer: disconnect the trailer
from your vehicle.
> Lay out the vehicle tool kit > page 261 and the
spare tire > page 266.
>» Switch the ignition off.
> Turn the wheel bolt approximately one turn to
the left. To achieve the required torque, hold
the end of the wheel wrench*. If the wheel bolt
will not loosen, press carefully on the wheel
wrench* with your foot. Hold onto the vehicle
securely while doing this and make sure your
footing is stable.

ZA\ WARNING
The vehicle must also be secured to prevent it
from rolling when using the vehicle jack*. Use
suitable objects to block the front and back of
the wheel that is diagonal from the wheel
with the flat tire.


Removing the caps



@

=
(G)
me
as
Fig. 173 Wheel: wheel bolts with caps
?
> Slide the plastic clip from the vehicle tool kit
onto the cap until it engages > fig. 173.
> Remove the cap with the plastic clip.
Loosening the wheel bolts
©
i=
x © a


Fig. 174 Wheel: loosening the wheel bolts
> Slide the wheel wrench* from the vehicle tool
kit all the way onto the wheel bolt.
264

ZA WARNING
To reduce the risk of an accident, only loosen
the wheel bolts gently one turn before raising
the vehicle with the vehicle jack*.

Raising the vehicle
Applies to: vehicles with vehicle jack

© & Ss
g
= % oo


Fig. 176 Sill: positioning the vehicle jack
> Place the vehicle jack from the vehicle tool kit
ona firm surface. Use a flat, stable support if
necessary. Ona slippery surface such as tile,
you should use a non-slip pad such as a rubber
mat > A\.
> Find the marking on the sill that is closest to
the tire that will be changed > fig. 175. Behind
the marking, there is a lifting point on the side
sill for the vehicle jack.
> Turn the handwheel to raise the vehicle jack un-
der the lifting point on the side sill until the

Emergency assistance

The wheel bolts must be clean and loosen and
tighten easily. Check the contact surfaces for the
wheel and hub. Contaminants on these surfaces
must be removed before installing the wheel.

ZA\ WARNING
— Read and follow the important information
and notes under > page 242.
— Never use the hex socket in the screwdriver
handle or the hex socket wrench with the
ratchet to loosen or tighten the wheel bolts.
This increases the risk of an accident, be-
cause you will not be able to achieve the cor-
rect tightening specification.
@) Note
When removing or installing the wheel, the
rim
could hit the brake rotor and damage the
rotor. Work carefully and have a second per-
son help you.
Unidirectional tires
A unidirectional tire profile is identified by arrows
on the tire sidewall that point in the running di-
rection. You must always maintain the specified
running direction. This is necessary to ensure the
tire's optimal performance in regard to adhesion,
running noise, and friction, and to reduce the risk
of hydroplaning.

To benefit fully from the advantages of the uni-
directional tire design, you should replace faulty
tires as soon as possible and restore the correct
running direction on all of the tires.
> Reinstall the caps on the wheel bolts if necessa-
ry.
> Store the vehicle tool kit in its designated
place.
> If the removed wheel does not fit in the spare
wheel well, store it securely in the luggage
compartment > page 83.
> Check the tire pressure on the installed wheel
as soon as possible.
> Correct the tire pressure and store it in the MMI
=> page 254.
266
> The wheel bolt tightening specification must be
90 ft lbs (120 Nm). Have it checked as soon as
possible with a torque wrench. Drive carefully
until then.
> Have the faulty wheel replaced as quickly as
possible.
Space-saving spare tire
Applies to: vehicles with space-saving spare tire (Compact
spare tire)
The spare tire is intended for short-term use only.
Have the damaged tire checked and replaced if
necessary by an authorized Audi dealer or author-
ized Audi Service Facility as soon as possible.
There are some restrictions on the use of the
compact spare tire. The compact spare tire has
been designed specifically for your type of vehi-
cle. Do not replace it with the spare tire from an-
other type of vehicle.
The compact spare tire is located in the luggage
compartment under the cargo floor cover
=> page 261.
The tire pressure must be adjusted to a specified
value listed on the tire pressure sticker
=> page 245, fig. 168.
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not permitted.
If you have to drive with snow chains and a front
tire fails, mount the spare tire in place of a rear
tire. Install the snow chains on the rear tire that
you removed, and install that in place of the
front tire that failed.

ZA\ WARNING
— After installing a spare tire, the tire pressure
must be checked as soon as possible.
— Do not drive faster than SO mph (80 km/h)
with a compact spare tire. Driving faster
than that increases the risk of an accident.
— To reduce the risk of an accident, avoid hard
acceleration or braking and driving fast
around curves with the compact spare tire.
— To reduce the risk of an accident, never drive
with more than one compact spare tire. >

Index

Parking lock
Manually releasing.............00000- 100
also refer to Gears... 6... eee e eee eee 97
Partition W@t sca < ssces v enees s aren ase 86, 87
Pass-through... .... cc eee cence eens 86
Pedals... 2... cece eee eee eee 99
Perchlorate ....... 0. eee eee ee eee 281
Peripheral cameras............0.000085 152
Phone
Connecting a second mobile device...... 163
Disconnecting a mobile device.......... 164
SONGS ccsain » iam © © wravens a % aosmem w v soveTs 6 169
Phonebook
refer to Directory.......... 0. e ee eae 167
PIN
A-digit myAudi PIN.................00. 30
PROLECHON sev: « ¢ cee x o cares § e oem oe ee 31
Playback (media). . sss. ss sees ie cease ee 203
Podcast
refer to Online radio.............. 197,198
POLISHINGisax « ¢ eee + & eee Eee a Ree a ee 257
Pollen filter
refer to Pollutant filter................. 90
Pollutant filter’: . aces ss seee s bees ween as 90
POWEP SOUPCES:: « = seme: =v seme ee meee e 82, 202
Power WiINdOWS ......... 0 eee e eee eens 45
Malfunction ns san 2 wean es ween a 2 wees = 45
Power windows malfunction.............. 45
Predictive control.............-.00e000- 133
Predictive messages..............--005- 129
pre sense
refer to Audi presense................ 143
Presentation mode..............-+-008 192
Presets
RadiGicres s ¢ eves 5 2 neues x 5 Haus oe ROWS FB: 196
Presets list
Feferto Presetsicis <2 sais Pressure
Tire pressure monitoring system........ 253
Tif@S': + : asvox ¢ & eaime & & eG 3 5 HORS 7 ES 245
Profile picture... . eee eee eee ee eee 30
Protecting ..... 0... 0c cece cece eee 257
Pyrotechnic elements..............000 281
296
Q
quattro... 2... eee 112
Selective wheel torque control.......... 113
R
RSGiG}: = : suse » 5 mews ¢ 2 Swe 2 a eee x eee 193
RadiOteXtiscn casi a i ance @ a anemia oo anew 196
Station list... 2.0.0... ee eee 193
Radio communications equipment........ 283
Radio‘equipment ....... eeen ee een ee eee 283
Radio Standards Specification (RSS) ....... 284
Rain/light sensor
Automatic headlights.................. 51
Intermittent mode (windshield wipers).... 58
Random
refer to Shuffle: . s sses s+ ovens peewee: 205
Range (fuel level) .................00000. 16
Reading lights.............. 2.000 eee eee 54
Rear cross-traffic assist.............0005 156
Rear lid
refer to Luggage compartment lid........ 41
Rear seatS.. 1... . cee eee eee 85, 86
Rear shelf
refer to Storage area behind the rear head
FEStrAINES wssve 2 o wawere oo esi ¥ 6 Rae @ 8 eens 83
Rearview camera... 12.1... ee eee eee eenes 152
Rear window defogger...............000 93
Rear wiper blades
Changing sec = wee ws were ov nee oo ae 8 60
Cleaning..... 2... . 6. cece eee 60
Recirculation mode..............--00005 92
RECUPERATION cesses vu suceae « & cameson ww eames ow Re 16
Refrigerant Oilivics = 5 wean eo wenn eo wwe 2 a0 287
Refueling’: ss sees 2 = saws 7 5 tees Fe ewe ro: 218
Remote access authorization (key user)..... 31
Remote control
Garage door opener..............2+-00. 48
Remote control key.............---.e eee 37
Convenience opening and closing......... 46
Key replacement...............--000-- 37
LED = suse 3 = wens = » owime oy ceeme se Rees ee 39
PANICTUMECIONS: « cscsses cs wrencce so ansnesa 3 8 arene 37
Replacing the battery.................. 39
Unlocking and locking...............005 38
also refer to Vehicle key..............-. 37