2018 AUDI A4 power steering

General information
Appl ies to: ve hicles with per ip heral cameras
Fig. 145 Loca tion of peripheral c amera s
The four periphe ral cameras are located in the ra­
diator grille, in the luggage compartment lid and
on both exterior mirrors ¢
fig. 145 . Make sure
that the lenses are not covered by deposits or any
other obstructions as this may impair the system.
For information on cleaning, see¢
page 354.
Black corners are shown in the vehicle silhouette
in
Area mode . Objects in these areas are outside
of the camera's field of view and are not detect­
ed.
& WARNING
- Always read and follow the applicable warn­
ings ¢
.&. in General information on
page 136.
- If the position or the installation angle of a
camera was changed, for example after a
collision, do not continue to use the system
for safety reasons. Have it checked by an au­
thorized Audi dealer or authorized Audi Service Facility.
- Keep in mind that the image in the display is
incorrect if the exterior mirror housing has
been moved out of place .
- Use the
Rear mode and the corner view
(rear)
mode only when the luggage com­
partment lid is completely closed. Other­
wise the image in the display will be incor­
rect.
- The vehicle surroundings are shown using
the camera images . The vehicle image is
shown by the system. Objects and obstacles
above the camera are not displayed.
Parking systems
-Camera lenses enlarge and distort the field
of vision. The objects appear both altered
and inaccurate on the screen.
(D Note
- Always read and follow the applicable warn­
ings
¢ (Din General information on
page 136.
- The Infotainment display shows the direc­
tion in which the rear of the vehicle is travel­
ing based on the steering wheel angle. The
front of the vehicle swings out more than
the rear of the vehicle . Maintain plenty of
distance so that an exterior mirror or a cor­
ner of the vehicle does not collide with any
obstacles.
(D Tips
If the 8/fl;!J/c::5 symbol appears in the dis­
play and the respective display area is grayed
out, then the power exterior mirrors were
folded in or the driver's door/front passeng­
er's door/luggage compartment lid was
opened.
Switching on/off
Applies to: vehicles wi th peripheral ca meras
Fig. 146 Center co nsole: button P. a
Fig. 147 In fo tai nment syste m: select the mode
141

Intelligent Technology
Intelligent Technology
Electronic stabilization
control (ESC)
Description
Elect ronic stabilization control (ESC) supports
driver safety.
It red uces the risk of slipping and
improves driving stability. ESC detects crit ica l sit­
uations such as when the vehicle is oversteering
and understeering or the wheels are spinning.
The vehicle is stabilized by applying the brakes or reducing eng ine torq ue. When the ESC engages,
the hJ ind icator light blinks in the instrument
cluste r.
The fo llow ing systems are integrated in the ESC:
Ant i-loc k bra king system (ABS)
ABS prevents the whee ls from locking when brak­
ing. The vehicle can sti ll be steered even during
hard brak ing. Apply steady pressure to the brake
pedal. Do not pump the pedal. A puls ing in the
brake pedal indicates that the system is acting to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease brak ing dis­
tance . It increases braking power when the driver
presses the brake pedal quick ly in emergency sit­
uations . You must press and hold the b rake pedal
until the dangerous situat io n is over . In veh icles
with adapt ive cr uise control*, the bra ke assist
sys tem is more sensitive if the d ista nce detec ted
t o the vehicle dr iv ing ahead is too small.
Anti -Slip Regulation (ASR )
ASR reduces eng ine power when the drive wheels
begin sp inning a nd adapts the force to the road
conditions . This makes it easie r to start, acceler­
a te and dr ive up h ills.
Electron ic differenti al lock (EDL )
The EDL applies the brakes to a wheel that starts
spinning and transfers the drive power to the
other driving wheel or wheels ( if the veh icle is
eq uipped w ith all whee l dr ive*) . T his function is
not available at higher speeds.
146 In extreme cases,
ED L automat ically switches off
to keep the brake on the braked wheel from over­ heating. The veh icle is still working correct ly. ED L
will switch on again automatically when condi­
tions have returned to normal.
Steering r ecommendat ion
The ESC he lps to stabilize the vehicle by changing
the steering torque.
In veh icles with dynamic s teer ing*, ESC a lso
helps to stab ilize the steering in cr it ica l situa ­
tions.
Selective wheel torque control
Se lective whee l torque cont rol is used when d riv­
i ng on curves. The front whee l on the inside of
t h e curve or both whee ls on the i nside of the
curve are braked se lectively as needed. This al­
l ows more precise driving in curves.
Automatic post -collision b raking system
The "automat ic post-collis io n braking system"
can help to reduce the risk of sliding and of addi­
tiona l collisions after an acc ident. If the a irbag
contro l modu le detects a collision, the ve hicle is
braked by the ESC.
The veh icle does not bra ke automatically if:
-the dr iver presses the accelerator pedal, or
-the ESC, the brake system or the veh icle electri-
cal system are not functioning.
&_ WARNING
-The ESC and its integrated systems cannot overcome the lim its imposed by natura l
phys ica l laws. This is espec ially important
on sl ippery or wet roads. If the systems be­
gin acting to stabilize your vehicle, you
should immediately alter your speed to match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your r isk of a coll is ion.
-Please note the r isk of a coll is ion increases
when dr iv ing fast, especially through curves
and on slippery or wet roads, and when dr iv­
ing too close to objects ahead . The ESC and
its integrated systems cannot always

Intelligent Technology
& WARNING
- Only apply the brakes for the purpose of
cleaning the brake system whe n road and
t raffic conditions perm it . You must not en­
dange r othe r road users . This increases the
risk of an accide nt.
- Never let the vehicle roll while the e ng ine is
stopped because this increases the risk of a n
a cci den t.
([) Note
- Neve r let the brakes " rub" by pressing the
pedal lightly when braki ng is not actually
necessa ry . T his ca uses the bra kes to over­
h ea t an d inc reases br akin g d istance an d
c a uses wear .
- B efo re driv ing downhill a long distance on a
steep hi ll, decre ase your spee d an d se lec t a
l ower gear . This makes use of t he engine
b raking effe ct and re lieves the brakes . If
you nee d to b rake additionally, b rake in in­
tervals and not continuously .
(D Tips
- If the brake booste r is no t working, yo u
must press the brake pedal with much more
fo rce than normal.
- If you retrofit you r vehicle with a front spoil­
er, whee l covers o r similar items, ma ke sure
that the a ir flow to the front whee ls is not
i nte rr u pted. Othe rw ise the brake system
ca n become too hot.
Electromechanical
steering, Dynamic
steering
T h e electromechanical st eering supports the
driver's steering movements.
Power steering adapts electronically based on
the vehicle speed.
Indicator lights and messages
• St ee ring : malfunction! Plea se stop vehicle
150
If this indicato r light turns on and stays on and
this message appears, the power steering may
have failed.
Stop t he vehi cle in a sa fe location as soon as pos­
s ible . Do
not contin ue driving . See an authorized
Audi dealer or authorized A udi Service Facility for
ass istance .
'I- ij Steering: malfun ction! You may continue
driving
I f the indicato r light turns on and the message
a ppears, the steeri ng wheel may be more d iffi­
cu lt to move o r more sensitive than usu al. The
stee ring wheel may also be at a n ang le when
driving straight.
D rive slowly to an auth o rized Audi dea ler or au ­
thorized Aud i Serv ice Facili ty to have t he mal ­
f unct io n corre cted .
t$Jj Dynamic steering: correcting steering wheel
position
If the indicator light turns on and this message
appears , the dynamic steering * is re in it ia liz ing .
The s teer ing whee l will be easy to move afte r
st ar ting t he engine . Reinitializa tio n might be
ne cessary if the stee ring w heel was moved while
t h e engine was switched off. The disp lay t urns
off if the initialization was successfu l.
(D Tips
- If the . or krfl i ndi cato r ligh t only s tays on
f or a sho rt time, you may cont inue driving .
- Th e dynamic stee ring s tabili ty sys tem s
¢ page 14 6 are not av ailabl e in the event of
a system malfunction .
- For add ition al informa tion o n dynamic
s teering, see
¢ page 133.
ALL-wheel drive (quattro)
App lies to: vehicles wi th all wheel drive
General information
In all whee l dr ive, the dr iv ing power is dis trib ut-
ed between all fo ur whee ls when needed. This
happens automatically depending on your driving
behavior as we ll as the c urrent road conditions.
.,_

Index
What happens if you wear your safety belt too
loose? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
267
What happens to unbelted occupants? . . . . 264
What impairs driving safety? . . . . . . . . . . . . 254
Wheel bolts . . . . . . . . . . . . . . . . . . . . . . . . . 349
Wheel replacement . . . . . . . . . . . . . . . . . . 363
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Clean ing . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Glossary of tire and loading terminology . 336
Replacing . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Tire pressure monitoring system . . . . . . . 352
Tires and vehicle load limits . . . . . . . . . . . 347
Wheel wrench . . . . . . . . . . . . . . . . . . . . . . . . 360
When must a safety belt be replaced? . . . . 265
When must the airbag system be inspected? 283
Where are lower anchorages located?
310
Wi-Fi
Audi music stream .. .......... .... ...
231
Audio player .. ... ............ .... .. . 231
Hotspot . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Online media . . . . . . . . . . . . . . . . . . . . . . . 232
also refer to Wi-Fi . . . . . . . . . . . . . . . . . . . 231
Windows
Child safety lock . . . . . . . . . . . . . . . . . . . . . . 48
Cleaning/removing ice . . . . . . . . . . . . . . . .
356
Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Power windows . . . . . . . . . . . . . . . . . . . . . . 48
Windshield Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . .
60
Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . 78
also refer to Windshield . . . . . . . . . . . . . . . 60
Windshield washer system . . . . . . . . . . 60, 332
Reservoir capacity . . . . . . . . . . . . . . . . . . . 381
W indshield wipers . . . . . . . . . . . . . . . . . . . . .
60
Winter operation
Car washes . . . . . . . . . . . . . . . . . . . . . . . . .
354
Cooling system . . . . . . . . . . . . . . . . . . . . . . 329
Defrosting the windows . . . . . . . . . . . . . . . 78
Removing ice from w indows . . . . . . . . . . .
356
Seat heating . . . . . . . . . . . . . . . . . . . . . . . . . 78
Snow chains . . . . . . . . . . . . . . . . . . . . . . . .
350
Steering wheel heating . . . . . . . . . . . . . . . . 79
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Vehicle battery .... ........... .... ... 331
Windshield washer system . . . . . . . . . . . . 332
Winter tires . . . . . . . . . . . . . . . . . . . . . . . . . . 349
400
X
Xenon headlights . . . . . . . . . . . . . . . . . . . . . 373
z
Zooming (map) .. .. .. .. ........... 206, 214