brakes AUDI A7 2018 User Guide

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" N .... 0 00 \.J ' -Please note that unconsciously "resting"
yo ur foot on the accelerator pedal prevents
the cruise control from braking. Th is is be­
cause pressing the acce lerator pedal over­
rides the cruise control system .
- If a brake system ma lf u nction such as over­
heating occu rs when the c ruise contro l sys­
tem is switched on, the braking function in
the system may be switched off . The rest of
t h e cruise control system f unction s remain
ac tive as long as
the @;(IM~ (USA model s) /
l'I (C anada models) indi cator light is on .
(D Tips
The brake lights turn on when the brakes a re
ap plied a utomat ica lly .
Changing speed
Applies to: vehicles with cruise control system
.. T o inc rease o r decrease the speed in incre ­
ments, tap the lever toward
0 10 <=> page 84 ,
fig . 86 .
.. To inc rease o r decrease the speed qu ickly, ho ld
the leve r in the
010 direction until the de­
s ired speed is displayed.
You can a lso press the acce lerator pedal down to
increase yo ur speed, for example i f you want to
pass someone. The speed you set earlier w ill re­
sume as soo n as you release t he accelerator ped­
al.
However, if you exceed your saved speed by S
mph (10 km/h) for longe r th an 6 mi nutes, the
cru ise control system tur ns off temporar ily .
The
green @;(i)~i~ (USA models) !l'I (Canada mod ­
e ls) indicator light in the speedometer tu rns off
and the stored speed is maintained.
Preselecting the speed
Applies to: vehicles with cruise control system
You can pre-select your desired speed when the
vehicle is stationary.
.. Switch the ign ition on.
.. Pull the lever into position @<=> page 84,
fig. 86 .
A ss istance systems
.. To increase or decrease the speed, tap the lever
toward
0 10 .
.. To store t he speed d isp layed, release the leve r.
T his func tion makes it possible , fo r example, to
save the spee d you want before driving on the
highway. Once on the highway, activate the
c ruise contro l by pull ing the leve r
towa rd @ .
Switching off
Applies to : vehicles with cruise control system
Deactivating temporarily
.. Press the brake pedal, or
.. Press the lever into position @(not clicked into
p lace) <=>
page 84, fig . 86, or
.. Dr ive fo r longer t han S m inutes faster than S
mph (10 km/h) above the stored speed .
Switching off completely
.. Press the lever into position@(clicked into
p lace), or
.. Switch the ignit ion off .
The speed you stored will be ma intained if the
cruise contro l has been switched off temporari ly .
To resume the stored speed, re lease the brake
peda l and pull the lever to
position @.
Switching the ignition off wi ll erase the stored
speed.
A WARNING "---
You should only resume the sto red speed if it
i s no t too high fo r existing t raff ic conditions .
Otherw ise you can inc rease the risk of an acci­
d ent .
Lap timer
Introduction
Applies to: vehicles with lap timer
Yo u can record and eva luate lap t imes with the
l ap timer <=>
page 86, fig. 87. The time is meas­
ur ed in m inutes, seconds and 1/10 seconds. The
ho urs are also shown when the lap time exceeds
60 m inutes . T he maxim um indiv id ual measure­
me nt is 99 ho urs. A maxim um of SO laps can be
r ecorded.
.,.
85

a co ,...,
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0 00 <..:l ' Audi adaptive cruise control
Description
Applies to: vehicles with Audi adaptive cruise control
Fig . 8 9 Detectio n ra n ge
The adaptive cruise co ntro l system is a comb ina­
tion of speed and d istance regula tion.
It assists
the dr iver by bot h regula ting the speed and
main taining a distance to the vehicle driving
ahead , within the limits of the system . If the sys­
tem detects and object ahead, adaptive cruise
control can brake and acce lerate your vehicle.
This makes driving more comfortable both on long stretches of highway and in stop-and-go
traffic .
What can adaptive c rui se control do?
T he adaptive cruise contro l system uses video, ra ­
dar and ultrasound . Objects driving ahead can be
recogni zed up to 650 feet (200 m) away.
On open roads with no traffic, it functions like a
cru ise control system . T he stored speed is ma in­
tained. When approaching an object ahead, the
adapt ive cruise control system automatically
brakes to match that object's speed and then
maintains the stored d istance. As soon as the
system does not detect a n object ahead, adaptive
cru ise con trol a cce lerates up to the stored speed .
In stop-and -go traff ic, adaptive cru ise control can
brake unt il the vehicle is s tat io nary and then be­
g in d riving aga in under certai n conditions
¢ page 90.
Aud i braking guard can warn you about an im ­
pending col lision and in itiate braking maneuve rs
q page92 .
Assi st a nce systems
Which functions can be controlled?
When yo u switc h adap tive cr uise control on, you
can set the current speed as the "contro l speed"
¢ page 89, Switching on/off .
When driving, yo u can stop cru ise cont rol
¢ page 91 or ch ange t he speed ¢ page 90 at
any t ime .
Yo u can also se t the distance to the object mov­
i ng ahead and set the d riving mode of the adap­
t ive cr uise con trol ¢
page 91.
General information
Applies to: vehicles with Audi adaptive c ruise con trol
Fi g. 90 Fro nt o f th e ve hicle : se nsors and v ideo ca mera
T he areas that conta in the radar and ult rasonic
senso rs and the video came ra
¢ fig. 90 mus t not
be cove red by stickers, deposits or o ther objects
because th is can in terfere with the funct ion of
the adaptive cruise contro l system and braking
guard . For i nformation on clea ning, see
¢ page 228. The same applies for any modifica­
tions made in the front area.
T he function of the adaptive cru ise control sys ­
tem and bra king g uard is limited under some
condit ions.
- Objects can on ly be detected when they are
w ith in the sensor range
¢ page 87 , fig . 89.
- The sys tem h as a limi ted abili ty to detect ob­
jects that are a shor t distance ahead, off to the
side of your vehicle or mov ing into your lane.
- Ob jects that are difficult to detect such as mo­
torcycles, vehicles with high g ro und clea rance
or an overhanging load are detected late or not
detected at all.
- When drivi ng through curves
¢ page 89 . .,.
87

Ass is tance sy stem s
@ Indicator light s
Ill -Adaptive cruise cont rol is switched on. No
objects a re detected ahead. The stored speed is
maintained.
• -An object ahead was detected. The adaptive
cruise control system regulates the speed and
distance to the object ahead and accelerates/
brakes automatica lly .
fai -Adaptive cruise control is switched on. An
object ahead was detected . Your vehicle rema ins
stopped and w ill not start driving automat ica lly.
• -The automatic braking is not enough to
maintain a suffic ient distance to a n object ahead.
You must intervene
¢ page 92, Request for
driver intervention.
© Instrument cluster display
I f adaptive cruise contro l is not shown in the in­
strumen t cluster display, yo u can call it up using
the multifunction stee ring wheel b uttons
¢ page 20.
Based on the graphics in the d isp lay, you can de­
termine if the system is ma inta ining a distance to
the object ahead and what that distance is.
No vehicl e -no object was detected ahead .
Whit e vehicle -an object was detected ahead.
Red veh icle -request for driver intervention
¢ page 92 .
Both
arrow s on the scale © indicate the distance
to the object ahead . No arrow appea rs when the
vehicle is on an open road and there is no obje ct
ahead. If an object is detected ahead, the arrow
moves on t he scale.
The green zone on the scale indicates the store
distance. For information on changing the dis ­
tance, refer to
¢ page 91. If the distance se­
lected is exceeded or not reached, the arrow
moves into the red zone on the sca le.
A WARNING
If you press the ISE TI button when driving at
speeds below 20 mph (30 km/h), the vehicle
accelerates automat ically up to 20 mph (30
90
km/h), wh ich is the minimum speed that can
be set .
(D Tips
-If you switch the ign it ion or the adaptive
cruise control system off, the set speed is
erased for safety reasons .
- The electronic stabilization control (ESC) and the anti-slip-regulation (ASR) are auto­
matically switched on when the adaptive
cruise control is switched on.
Changing the speed
Applies to: vehicles with Audi adapt ive cruise control
0
f
jJ
0
Fig . 95 Operat ing lever: chang ing the speed
.,. To increase or reduce the speed in increme nts,
tap the lever up or down.
.,. To increase or decrease the speed qu ickly, hold
the lever up or down until the red LED @ reach­
es the des ired
speed ¢ page 89 , fig. 94.
After each change, the new stored speed appears
briefly in the information
line¢ page 89, fig. 94
@ .
Driving in stop-and-go traffic
App lies to: vehicles with Aud i adapt ive cru ise control
The adaptive cru ise cont rol system also assists
you in stop-and-go traffic.
Stopping automatically
If
an object ahead stops, your vehicle will brake
and stay at a stop, within the limits of the sys­
tem . The Start/Stop system* can be used as usu-
al. ..,.

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0 00 <.,;) ' Driving manually
.,. Tap the accele rator pedal , o r
... pull the lever toward you into position @.
@ Tips
If an obstacle is detec ted when your veh icle
starts moving, the driver intervention request
appears
~ page 92. Your vehicle will drive
more slow ly when starting . This may also
happen in some situations when there is no
apparent obstacle.
Interrupting cruise control
App lies to: vehicles with Audi adaptive cruise contro l
Fig. 96 Sele ctor l eve r
Requirement: adaptive cruise contro l must be
sw itched on.
Overriding cruise control
.,. T o accelerate manually , p ull the lever toward
you into pos ition
@ and hold it there . T he mes­
sage
ACC: over ride appears. Or
... Press the accelerator pedal.
... To resume c ru ise control, release the lever or
take your foot off the acce lerator pedal.
Canceling crui se control while dri ving
.,. Move the leve r into posit ion @. The message
ACC: standb y appears. Or
... Press the brake pedal.
... To resume the stored speed, move the lever in ­
to posit ion
@ .
Canceling cruise control when stopp ed
... Push the lever away from you into position @.
The message
ACC : standby appears.
A ssi st a nce systems
... To resume cru ise contro l, press the brake peda l
and pu ll the l ever toward you into pos ition @ .
A WARNING
It is dangerous to activate cruise control and
resume the stored speed when the current
road, traffic or weather cond itions do not per­
mit this . This increases the risk of an accident .
Setting the distance
Applies to: vehicles with Audi adaptive cru ise control
F ig . 97 Operat ing lever: sett ing t he d ist ance
... T ap the switch to display the current set dis ­
tance ¢
fig. 97.
N (X) N 9 :I:
~
... To increase or reduce the d istance in incre­
ments, tap the switch aga in to the r ight or left .
The distance between the two vehicles will change i n the inst rumen t cluste r display .
When approaching an object ahead , the adaptive
cruise contro l system brakes to match that speed
and then adjusts to the set d istance .
If the object
ahead accelerates, adaptive cruise contro l w ill al­
so accelerate up to the stored speed .
The higher the speed, the greater the distance in
meters ¢.&. . The Distance 3 setting is recom­
mended . That is equa l to the gene ral recommen­
da tion of "half the speed shown on the speedom ­
eter" .
The distances provided a re specified values . De­
pending on the driv ing s ituation and the way the
object ahead is dr iving, t he actual d istan ce may
be more or less tha n these ta rget distan ces .
The various symbo ls for the time increments ap­
pears briefly in the info rmation line @
~ page 89, fig. 94 when you change the settings . .,.
91

a co .... N
" N .... 0 00 \.J ' What can the braking guard do?
When detected in time, the system can assess
dangerous sit uat ions where an object a head
brakes suddenly or if your own vehicle is traveling
at a high speed and approaching an object that is
mov ing more slowly. The brak ing guard does not
react if it cannot detect the situation.
The system advises you of various dangero us sit­
uations :
- T he
distan ce warning occurs if you d rive too
closely to the object ahead for a long period o f
time . If the object ahead brakes strongly, you
would not be able to avoid a collision .
The.
indicator light appears as an indication for th is.
- The
app roach wa rning occurs when an object
ahead is traveling more s low ly or brakes
strongly. When th is warning occurs, it may on ly
be poss ible to avoid a co llision by swerving or
braking strongly . The danger is indicated by the
• ind icator light ~ fig . 99 . An aud io signal w ill
also sound .
If you do not react early enough or at a ll to a dan­
ge rous situation, the braking guard suppo rts you
w ith a brak ing intervent ion .
- If a co llision is imminent, the system will first
provide an
ac ute warning by braking sharply.
- If you do not react to the acute warning, the braking guard can increase the braking force
within the limits of the system
ll . Th is reduces
the veh icle speed in the event of a collision .
- The system can init iate comp lete decelerat ion
shortly before a collision
l l. Full deceleration at
high speeds occurs only in vehicles with adap­
t ive cru ise control and s ide ass ist (pre sense
plus).
- If the braking gua rd determines that you are
not brak ing st rongly eno ugh whe n there is an
i mpending co llision, i t can increase the brak ing
fo rce .
- T he pre se nse functions also engage whe n
the re is an impend ing
collision ~ page 95.
ll This is not availa ble in so me co untrie s.
A ss istance systems
Which functions can be controlled?
Yo u can swit ch t he b raking guard and t he d is ­
tance/approach warning on or
off in the Infotain ­
ment system
~ page 94, Settings in the Info­
tainment system .
A WARNING
--
Lack of attention can cause collisions, other
accidents and ser ious personal inj uries. The
braking guard is a n assist system and cannot
pr event a collision by itself . T he dr iver m ust
a lways inte rvene . The d river is always respon­
s ib le for b raking at the co rrect t ime.
- Always pay close atten tion to traffic, even
when the b raking gua rd is switched on. Be
ready to in tervene and be rea dy to take
comp le te co ntro l wheneve r ne cess ary. A l­
ways keep the sa fe and legal distance be ­
tween your vehi cle a nd ve hicl es up ahead .
- B raki ng g uard works w it hi n limi ts a nd will
not respond o uts ide the system limits, fo r
examp le when approach ing a stopped veh i­
cle or stationary obstacle (end of a traff ic
jam or vehicle that has broken down in traf ­
fic).
- Always remember that the radar sensor for
the brak ing guard works only within def ined
detection and range limits that may prevent
the proper detect ion of other vehicles.
- The radar sensor's function and range can
be reduced by rain, snow and heavy spray.
Mov ing vehicles up ahead may not be
promptly de tected or may no t be detected
at a ll.
- Reflective surfaces includi ng crash ba rriers
or tunne l entra nces may impair the function
of t he ra da r se nso r.
(D Tips
- You can cancel the braking with increas ing
force tha t is initiated by t he sys tem by brak­
ing yourse lf, by acce le ra ting not iceably or
by swe rving.
- Keep in mind that b raking gua rd can b rake
unexpectedly. A lways secure a ny cargo or
93

Intelligent Technology
Intelligent Technology Electronic stabilization
control (ESC)
Description
Elect ronic stabili zation control ( ESC) suppo rts
driver safety. It red uces the risk of slipping and
improves dr iving stabi lity. ESC detects crit ica l sit­
uations such as the vehicle overstee ring and un­
dersteeri ng or the w heels are sp inning. The vehi­
cle is stabilized by app lying the brakes or reduc ­
i n g e ngine torque . As soon as the ESC is active ly
regula ting, t he
Ii) indicato r light blink s in the in­
s trumen t clus ter.
The fo llow ing systems are in tegrated in the ESC:
Anti-lock braking system (ABS)
ABS p reve nts the whee ls from lock ing whe n brak ­
ing. The vehicle can st ill be steered even d uring
hard brak ing. Apply steady press ure to the bra ke
pedal. Do not pump the pedal. A puls ing in t he
b rake pedal indicates that the system is act ing to
s tabili ze the vehicle .
Brake assist system
The brake assist system can dec rease brak ing dis­
tance. It inc reases brak ing power when the d river
presses the brake pedal q uick ly in eme rgency sit­
uations . You must press and hold t he b rake pedal
until the dangerous si tuatio n is ove r. In veh icles
w ith adapt ive c ruise con trol*, the bra ke assist
sys te m is more sensitive if t he di stan ce detec ted
t o the veh icle dr iv ing a head is too small. On
ve hicl es w ith ac tivated and funct io ni ng night vi ­
sion assist*, the brake assist system can respond mo re sensit ively if there is a warning .
Anti-Slip Regulation (ASR)
ASR reduces eng ine power when the drive w heels
beg in sp inning a nd ad ap ts the force to the road
conditions. This makes i t easie r to sta rt, acceler ­
ate and dr ive up h ills.
Electronic differential lock (EDL)
ED L appl ies the bra kes to a w heel that st arts
sp inning and transfe rs th e dr ive powe r to the
120
othe r driving whee ls. This func tion is no t ava ila ­
ble at higher s peeds .
I n extre me cases , EDL au tomat ic al ly swi tches off
to keep t he b rake o n the br aked whee l from ove r­
h eating. The ve hicle is still wo rking co rrect ly. EDL
will switch on agai n automatically when co ndi ­
tions have returned to normal.
Steering recommendation
The ES C he lps to s tabili ze th e vehicle by ch ang ing
t h e steer ing torque.
In veh icles wi th dyna mic steer ing*, ESC a lso
h elps to stab ilize the steer ing in cr it ica l sit ua ­
t ion s.
Selective wheel torque control
Se lective wheel to rque con trol is used when driv­
i ng o n curves . The fron t whee l on the inside of
t h e curve or bo th whee ls on the i nside of th e
cu rve are braked se lective ly as needed. This al­
l ows mo re prec ise dr iving in curves .
Automatic post -collision braking system
The "automa tic post -coll is io n braking system"
can hel p t o reduce the risk of sl iding and of addi­
tiona l co llisions after an acc iden t. If th e a irbag
c ontro l modu le de tec ts a c ollisi on above a cert ain
vehicle speed, the ve hicle is brak ed by the ESC.
The veh icle does not brake automatically if :
- the drive r presses t he acce lerator pedal, or
- the bra kin g force generate d by the presse d
brake pedal is greater than the b raking force
that wo uld be in itiated by the system, or
- the ESC, the bra ke system or the ve hicle elect ri­
cal system are not functioning.
A WARNING
- The ESC and its integ rated systems can not
overcom e the lim its imposed by natura l
p hys ica l laws . Thi s is esp ec ially impo rtan t
on s lippery or wet roa ds. If the sys te m s be­
g in a cting to stab ilize y our vehicle, y ou
s ho uld immedi ately alter y o ur speed to
match the road an d traffic condi tions . Do
not let the increased safety provi ded tem pt

Intelligent Technology
ESC levels
Applies to : RS models
Sport mode on ESC/ASR off Sport mode off or
ESC/ASRon
Behavior
The ESC and ASR stabiliza -
The stabilization function is Th
e fu ll stabilization func-
tion functions are limited not available
¢ .&. . ESC and tion of the ESC and ASR is
¢ .&_. ASR are switched off. avai lab le aga in.
Operation Press the I~ OFFI button Press and hold the I~ OFFI Press the I ~ OFFI button
briefly. button
longer than 3 sec-
again.
onds .
Indicator II turns on. II and II turn on. II turns off or II and II
lights turn off.
Messages Stabilization control (ESC): Stabilization control (ESC): Stabilization control
Sport Warning! Reduced Off Warning! Reduced sta- (ESC): On
stability bility
A WARNING
-You should only switch sport mode on or
switch ESC/ ASR off if your driving abilities
and road conditions permit.
- The stabilization function is limited when
sport mode is switched on. The driving
wheels could spin and the vehicle could swerve, especially on slick or slippery road
surfaces.
- There is no vehicle stabilization when ESC/
ASR are switched off.
(D Tips
- ESC/ASR cannot be switched off or sport
mode cannot be switched on if the cruise
control system* or the adaptive cruise con­
trol* is switched on.
- If the rear spoiler system malfunctions,
sport mode may not switch on or it may
switch off again automatically.
Brakes
New brake pads
-
New brake pads do not achieve their full braking
effe ct during the first 2S0 mi (400 km). They
must be "broken in" first.
The break-in period can be considerably longer
for vehicles with ceramic brake rotors*. However,
you can compensate for the slightly reduced
122
braking force by pressing firmly on the brake
pedal. Avoid heavy braking during the break-in
period.
Wear
Brake pad
wear depends large ly on the way the
vehicle is driven and on operating conditions .
This is espec ia lly true if you are driv ing frequently
i n the city and on curves or with a sporty driving
style.
Operating noise
Noises may occur when braking depending on the
speed, braking force and outside conditions such
as temperature and humidity.
Noises may become more apparent at lower
speeds due to the nature of the materials in the
ceramic brake rotors*.
Effect of water and road salt
In certain situations, for example after driving
through water, in heavy rain, after overnight con­
densation or after washing your car, the braking
effect can be reduced by moisture or ice on the
brake rotors and brake pads. The brakes must be
"dried" first with a few carefu l brake applica­
tions.
At higher speeds and with the windshield wipers
turned on, the brake pads press against the brake
rotors for a short amount of time. This action,
which is not felt by the dr iver, happens at regular
IJIJ,

a co .... N
" N .... 0 00 \.J ' intervals and ensures a better reaction time for
the brakes in wet weather.
The braking effect can also be reduced if you are
driving on salted roads and you do not apply the
brakes for long periods of time. The layer of salt
on the brake rotors and pads must be worn off
first when the brakes are applied.
Due to its surface, the ceramic brake rotor* ab­
sorbs moisture in certain situations. Therefore,
there will temporarily be less braking force than
when the brakes are dry. You can compensate for
this by pressing the brake pedal harder.
Corrosion
Leaving the vehicle parked for long periods of
time, low mileage and avoiding heavy braking
can contribute to corrosion on the brake rotors
and to dirty brake pads.
If you usually avoid heavy braking or if there is
corrosion present, occasional heavy braking at
high speeds is recommended to clean the brake
rotors and
pads ¢.&. .
Brake system malfunction
If you notice that the brake pedal travel has sud­
denly increased, then a brake circuit in the dual­
circuit brake system may have malfunctioned. Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
problem corrected. On the way there, drive with
reduced speed and keep in mind that you will
need a longer distance to stop and you will need
to press the brake pedal harder .
Low brake fluid level
When the brake fluid level is low, malfunctions in
the brake system may occur . The brake fluid level
is electronically monitored .
Brake booster
The brake booster amplifies the pressure you ap­
ply to the brake pedal. It only works when the en­
gine is running.
A WARNING
-Only apply the brakes for the purpose of
cleaning the brake system when road and
-
Intelligent Technology
traffic conditions permit. You must not en­
danger other road users. This increases the
risk of an accident.
- Never let the vehicle roll while the engine is
stopped because this increases the risk of an
accident.
- New brake pads do not achieve their full
braking effect during the first 250 mi
(400 km) . They must be "broken in" first.
The break-in period can be considerably lon­
ger for vehicles with ceramic brake rotors*.
However, you can compensate for the
slightly reduced braking force by pressing
firmly on the brake pedal. Avoid heavy brak­
ing during the break-in period.
- Certain weather and operating conditions
such as driving through water, driving in
heavy rain or driving after washing your ve­
hicle can impair the effectiveness of the
brakes. In the winter, ice may build up on
the brake pads, rotors and drums. Check
these components by braking carefully. Ap­
plying the brakes carefully several times
dries the brakes and removes ice build-up .
- The efficiency of the brakes can also be im­
paired by driving for long stretches on roads
covered with salt without using the brakes.
You can remove salt deposits from the
brake rotors and pads by carefully applying
the brakes several times.
- If the front spoiler is damaged or you install
another spoiler, make sure the front wheel
brakes are ventilated properly. Otherwise,
the brake system could overheat, which re­
duces their effectiveness.
- Failure of a brake circuit impairs braking
performance, which increases braking dis­
tance. Avoid driving the vehicle and have it
towed it to the nearest authorized Audi
dealer or authorized Audi Service Facility.
- If the brake booster is not working, you will
have to press much harder on the brake
pedal to compensate for the lack of the
booster .
@ Note
-Never let the brakes "rub" by pressing the
pedal lightly when braking is not actually
123

Intellig ent T echn olo gy
necessary. This causes the brakes to over­
heat and increases braking distance and
causes wear.
- Before driving downhi ll a long distance on a
steep hill, decrease your speed and select a l ower gear. This makes use of the engine
braking effect and relieves the brakes. If
you need to brake additionally, brake in in­
tervals and not continuously .
(D Tips
-If the brake booster is not working, you
must press the brake pedal with much more
force than normal.
- If you retrofit your vehicle with a front spoil­
er, wheel covers or s imilar items, make sure
that the a ir flow to the front wheels is not
i nterrupted. Otherw ise the brake system
ca n become too hot.
Electromechanical
steering, dynamic
steering
The electromechanical steering supports the
driver's steering movements .
Power steering adapts electronically based on
the vehicle speed .
Indicator light s and me ssages
• Do not d rive vehicle: St eering d efecti ve
If t his ind icator light tu rns o n and stays o n and
this message appears, t he power steer ing may
have fai led.
Stop the veh icle in a safe locat io n as soon as pos­
sib le. Do
n ot continue dr iving. See an author ized
Aud i dea ler or authorized Aud i Serv ice Facility for
assistance.
l;:r-ij St ee ring : Sys tem f ault You can con tinu e
dri ving
If the ind icator light turns on and the message
appears, the steering wheel may be more diff i­
cult to move or mo re sensit ive tha n usual. The
steer ing whee l may a lso be at an angle when
driving straight .
124
Drive slowly to an authorized Audi dea ler or au­
thorized Audi Service Facility to have the mal ­
funct ion corrected .
'I-ij Dyn ami c ste ering : Initializing
If the indicator l ight is blinking and this message
appears, dy namic stee ring* is be ing initialized.
The steer ing whee l will be easy to move afte r
start ing t he engine . Re -init ialization mig ht be
necessary if the steering wheel was moved hard
to the left and right while the vehicle was not
moving . The d isp lay turns off if the init ia li zation
was successful.
(D Tips
- If the . or 'Tfl indicator light only stays on
for a short time, you may cont inue driving .
- Th e dynamic steering stability systems
<=>page 120 are not avai lab le in the event of
a system malfunction.
- For additiona l information on dynamic
steering, see
<=> page 105.
All wheel drive (quattro)
Applies to: vehicles with all wheel drive
In all wheel drive, all four wheels are powered.
G en eral information
In all whee l dr ive, the dr iv ing power is divided be ­
tween all four whee ls. This happens automatical­
l y depending on your driving behavior as we ll as
the current road conditions . Also see
c> page 120, Electronic stabili zation control
(ESC).
A center differential distributes the driving power
variab ly to the front and rear ax le. It works to­
gether w ith selective whee l torque contro l, wh ich
activates when driving through curves
<=>page 120 . With the sport d ifferent ial*, power
distribution to the rear wheels is variable and can
be adjusted with d rive select
c> page 105 .
The all wheel drive concept is designed for high
engine power . Your vehicle is except ionally pow­
erful and has excellent driving characteristics
both under normal driving conditions and on
snow and ice. A lways read and follow safety pre-
ca utions
c> .&. . II>-

Wheel s
Glossary of tire and loading
terminology
Accessory weight
means the combined weight (in
excess of those standard items
which may be replaced) of auto­ matic transmission, power steer­
ing , power brakes , power win­
dows , power seats, radio, and
heater, to the extent that these
items are available as factory-in­
stalled equipment (whether in­
stalled or not).
Aspect ratio
means the ratio of the height to
the width of the tire in percent. Numbers of 55 or lower indicate a
low sidewall for improved steer­
ing response and better overall
handling on dry pavement .
Bead
means the part of the tire that is
made of steel wires, wrapped or
reinforced by ply cords and that is
shaped to fit the rim.
Bead separation
means a breakdown of the bond
between components in the bead.
208
Cord
means the strands forming the
plies in the tire.
Cold tire inflation pressure
means the t ire pressure recom­
mended by the vehicle manufac­
turer for a tire of a designated
size that has not been driven for
more than a couple of miles (kilo ­
meters) at low speeds in the
three hour period before the tire pressure is measured or adjusted.
Curb weight
means the weight of a motor ve­
hicle w ith standard equipment in­
cluding the maximum capacity of
fuel, oil, and coolant, ai r condi­
tioning and additional weight of
optional equipment.
E x tra load ti re
means a tire designed to operate
at higher loads and at higher in­
flation pressures than the corre­
sponding standard tire. Extra load
tires may be identified as "X L",
"
l" "EXTRA LOAD" or "RF" on X I I
the sidewall. .,.