wheel AUDI S8 2010 Owner's Guide

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costs o r even t he lack of ve hicle damage is not necessarily an ind ica­
t ion of w heth er an a irba g should inflat e or not.
S ince the c ircumstances will vary considera bly b etwee n one co llision
and another, it is not possi ble to define a range of vehicle spee ds that
w ill c ove r eve ry po ssibl e kind and angle of i mpac t that will alw ay s
trigge r the a irbags. Im portant facto rs include, for examp le, the
n at ure (har d or so ft ) of th e obje ct wh ich t he c ar hi ts, the an gle of
impact, vehicle speed, etc . T he front airbags w ill also not inflate in
s ide or rear co ll is io ns, or i n roll-o ve rs.
Always remember: Airbags will deploy only once, a nd only in certain
kinds of coll isions . Yo ur safety be lts are a lways there to offer protec ­
ti on in t hose situ ations i n w hich air bags are not s upposed to deploy,
or w hen they have alrea dy de ploye d; for examp le, w hen your ve hicle
s tr ikes or is st ruc k by ano ther ve hicle after the fi rst co llisio n.
T hi s is just one of the reasons w hy a n airbag is a s upplementary
res tra in t a nd i s no t a su bs titu te for a saf ety bel t. The air bag syste m
works most effective ly whe n used w ith the safety belts . Therefore,
always p rope rly wea r you r sa fety belts ~ page 197 .
& WARNING
Sitting too close to the steering wheel or instrument panel will
decrease the effectiveness of the airbags and will increase the r isk
of personal injury in a collision.
• Never sit closer than 10 inches (25 cm ) to the steer ing wheel or
instrument panel.
• If you cannot sit more than 10 inches (25 cm ) from the
steering wheel, investigate whether adaptive equipment may be
available to help you reach the pedals and increase your seating
distance from the steering wheel.
• If you are unrestrained, leaning forward, sitting sideways or
out of po sition in any way, your risk of injury is much higher.
• You will also receive serious injuries and could even be killed if
you are up against the airbag or too close to it when it inflates - even with an Advanced Airbag .
Controls and equip­ ment Safety first Vehicle operation
& WARNING
(co ntinued )
• To reduce the risk of injury when an airbag inflates, always
wear safety belts properly=>
page 201, "Safety belts ".
• Always make certain that children age 12 or younger always
ride in the rear seat. If children are not properly restrained, they
may be severely injured or killed when an airbag inflates.
• Never let children r ide unrestrained or improperly restrained in
the vehicle. Adjust the front seats properly .
• Never r ide with the backrest reclined.
• Always sit as far as possible from the steering wheel or the
instrument panel=>
page 188.
• Always sit upright with your back against the backre st of your
seat .
• Never place your feet on the instrument panel or on the seat.
Always keep both feet on the floor in front of the seat to help
prevent serious injuries to the legs and hips if the airbag inflates .
• Never recline the front passenger 's seat to transport objects .
Items can also move into the area of the side airbag or the front
airbag during braking or in a sudden maneuver. Objects near the
airbags can become projectiles and cause injury when an airbag
inflates .
& WARNING
Airbags that have deployed in a crash must be replaced.
• Use only original equ ipment airbags approved by Aud i and
installed by a trained technician who ha s the necessary tools and
diagnostic equipment to properly replace any airbag in your
vehicle and assure system effectiveness in a crash.
• Never permit salvaged or recycled airbags to be installed in
your vehicle. •
Vehicle care Do-it-yourself service Technical data

Airbag system -----------------=--=---
& WARNING (co ntinued )
• Airbag work most effectively when used with properly worn
safety belts .
• Therefore, always wear your safety belts and make sure that
everybody in your vehicle is properly restrained .
& WARNING
A person on the front passenger seat, especially infants and small
children, will receive serious injuries and can even be killed by
being too close to the airbag when it inflates .
• Although the Advanced Airbag System in your vehicle is
designed to turn off the front passenger airbag if an infant or a
small child is on the front pa ssenger seat, nobody can absolutely
guarantee that deployment under these special conditions is
impossible in all conceivable situations that may happen during
the useful life of your vehicle.
• The Advanced Airbag Sy stem can deploy in accordance with the
" low risk " option under the U .S. Federal Standard if a child that is
heavier than the typical one-year old child is on the front
pas senger seat and the other condition s for airbag deployment
are met.
• Accident statistics have shown that children are generally safer
in the rear seat area than in the front seating position.
• For their own safety, all children, especially 12 years and
younger, should alway s ride in the back properly re strained for
their age and size. •
Advanced front airbag system
Your vehicle is equipped with a front Advanced Airbag System in
compliance wi th Uni ted States Feder al Motor Vehicle Safe ty Standar d
208 as app licab le at the time your vehicle was manufactured.
Controls and equip­
ment Safety first Vehicle operation
T
he front Advanced A irbag System supp lements the safety belts to
prov ide add itional p rote ction for the dr ive r's and fr ont pa ssenge r's
heads a nd upper bodies in fro ntal crashes. The airbags inflate on ly in
fronta l im pacts w he n the vehicle dece le ration is high enoug h.
Th e front Adv anced Airbag Sys te m f or the fron t se at oc cupan ts is no t
a s ubstitute for your safety be lts. Rathe r, it is part o f the overa ll occu­
p a nt res tra in t system in y our ve hicl e. Alway s remembe r th at the
airbag system can on ly help to protect you, if yo u are s itting upr ight,
we aring yo ur sa fety be lt and wear ing it prope rly. This i s why you and
your passengers must always be p roperly restra ined, not just beca use
t he law requires you to be.
The Adva nce d A irbag System in your vehicl e has b een cert ified to
meet the " low ris k" requirements fo r 3 and 6 year-old c hildren on the
p as senge r side an d very sma ll adults on the d river side. The low r isk
deployment criter ia a re intended to he lp red uce the risk of in jury
t hroug h in ter action wi th the fr ont air bag t hat can oc cur, fo r exam ple,
by being too close to the steering wheel and instr ument panel when
t he ai rbag inf lates.
I n addit ion, the system has bee n certified to comply wi th t he
"sup pression" requirements of the Safety Sta nda rd, to turn
off the
front airbag for infants 12 mont hs old and you nger w ho are
restra ined o n the front passenger seat in child restraints that are
listed i n the Standard::::>
pag e 233, "Child restraints a nd Advanced
Airbags".
"Supp ression" re quires the fron t airb ag on the passenger side to be
t urn ed
off if:
• a ch ild up to about one yea r of age is restrained on the front
passenger s eat in one o f the re ar-fa cing o r forwar d-fac ing infant
restra ints listed i n Federal Moto r Vehicle Safety Stan dard 208 with
w hich the A dvanc ed Air bag System in y our ve hicle w as certi fied . For a
list ing of the child rest raints t hat were used to ce rtify your vehicle's
co mplia nce wi th th e US Safety St and ard
=> page 2 33,
• weight less than a thresho ld level stored in the contro l unit is
de te cted on t he fr ont passenge r sea t.
Vehicle care Do-it-yourself service Technical data

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lower parts of the body . Front airbags supplement the th ree-point
sa fety belts o nly in some fron tal co llis io ns in whi ch the vehicl e decel­
eratio n is h igh enough to d eploy the a irbags .
Front airbags will not deploy:
• if the ignition is sw itched off when a cras h occ urs,
• in s ide collisions,
• in rea r-end collisions,
• in rollovers,
• when the cras h deceler ati on me asured by t he airba g sy st em is le ss
than t he m in imum thres hold needed for airbag dep loyment as regis­
t ere d by the e lectro nic cont rol uni t.
The front passenger airbag also will not deploy:
• when the front pas se ng er s eat is not occupi ed,
• when the we ight on the front passenge r seat as sense d by the
Adv anced Air bag Sy stem indicat es th at t he fron t a irbag on the
passenger s ide has to be turned off by the e lec tron ic cont rol u nit (the
PASSENGER AIR BAG OFF ligh t com es o n an d st ay s on ).
& WARNING
Sitting in the wrong position can increase the risk of serious injury
in crashes .
• To reduce the risk of injury when the airbags inflate, the driver
and passengers must always sit in an upright position, must not lean against or place any part of their body too close to the area
where the airbags are located.
• Occupants who are unbelted, out of position or too close to the
airbag can be seriously injured by an airbag as it unfolds with
great force in the blink of an eye=>
page 208 .
& WARNING
A child in a rearward-facing child seat installed on the front
passenger seat will be seriously injured and can be killed if the
front airbag inflates - even with an Advanced Airbag System.
• The inflating airbag will hit the child seat or infant carrier with
great force and will smash the child seat and child against the
backrest, center armrest, door or roof.
• Always install rear-facing child seats on the rear seat .
• If you must install a rearward facing child seat on the front
passenger seat because of exceptional circumstances and the
PASSENGER AIR BAG OFF light does not come on and stay on,
immediately install the rear-facing ch ild seat in a rear seating
position and have the airbag system inspected by your Audi
dealer .
& WARNING
Objects between you and the airb ag will increase the risk of injury
in a crash by interfering with the way the airbag unfolds or by
being pushed into you as the airbag inflates.
• Never hold things in your hands or on your lap when the vehicle
is in use.
• Never transport items on or in the area of the front passenger
seat . Objects could move into the area of the front airbags during
braking or other sudden maneuvers and become dangerous
projectiles that can cause se rious personal injury if the airbags
inflate.
• Never place or attach accessories or other objects (such as cup
holders, telephone brackets, large, heavy or bulky objects ) on the
doors , over or near the area marked "AIRBAG" on the steering
wheel, instrument panel, seat backrests or between those areas and yourself. These objects could cause injury in a crash , especially
when the airbags inflate. ..,.

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& WARNING (conti nued)
position and have the airbag system inspected by your Audi
deal er.
• A tight tether or othe r strap on a rearward-facing child
restraint attached to the front passenger seat can put too much
pressure on the weight-sensing mat in the seat and register more
weight than i s actually on the seat. The heav ier weight registered
can make the system work as though an adult were on the seat
and deploy the Advanced Airbag when it must be suppressed
causing serious or even fatal injury to the child .
• If, in ex ceptional circumstances, you must install a forward·
facing child restraint on the front passenger seat, always move
the seat into i ts rearmo st po sition in the seat's fore and aft adjust ·
ment range, as far away from the airbag as possible . The backrest
must be adjusted to an upright position. Make sure that the
PASSENGER AIR BAG OFF light comes on and stays on all the time
whenever the ignition is switched on.
& WARNING
• If the PASSENGER AIR BAG OFF light do es not go out when an
adult is sitting on the front passenger seat after taking the steps
de scribed above, make sure the adult i s properly seated and
restrained at one of the rear seating positions.
• Have the airbag system inspected by your Audi dealer before
transporting anyone on the front passenger seat .
[ i ] Tips
If the we ight-sens ing mat in the front passenger seat detects an
empty seat, the front a irbag on the passenger side w ill be t urne d off,
and the PASSENGER
AIR BAG OFF light w ill stay on .•
Repair, care and disposal of the airbags
Parts o f the a irbag system are installed at many different p laces on
your Audi. Install ing, remov ing, servic ing or repa iring a part in an
area of the ve hicle can damage a part of an airbag system and preve nt
t ha t system from working pro perl y in a coll is ion.
T here are some important thi ngs you have to know to make sure that
the effectiveness of the system will not be impa ired and that
discarded components do no t cause injury or poll ute the enviro n­
ment .
& WARNING
Improper care , servicing and repair procedures can increase the
risk of personal injury and death by preventing an airbag from
deploying when needed or deploying an airbag unexpectedly:
• Never cover, obstruct , or change the steering wheel horn pad or
airbag cover or the instrument panel or modify them in any way.
• Never attach any objects such as cup holders or telephone
mountings to the surfaces covering the airbag unit s.
• For cleaning the horn pad or instrument panel, use only a soft,
dry cloth or one moistened with plain water. Solvent s or cleaners
could damage the airbag cover or change the stiffness or strength
of the material so that the airbag cannot deploy and protect prop·
erly .
• Never repair, adjust, or change any part s of the airbag system .
• All work on the steering wheel, instrument panel , front seats
or electrical sy stem (including the installation of audio equip·
ment , cellular telephones and CB radios, etc .) must be performed
by a qualified technician who ha s the training and special equip ·
ment necessary .
• For any work on the airbag system, we strongly re commend
that you see your autho rized Audi dealer o r qualified workshop.
• Never modify the front bumper or parts of the vehicle body.
liJ,,

-Airbag system PHI- --=--=----------------
& WARNING
Changing th e vehicle 's su spension including use of unappro ved
tire -rim c ombination s can change Advan ced Airbag performan ce
and increas e the risk of serious personal injury in a cra sh .
• Never install suspension component s that do not have the
same performance characteristics as the components or iginally
installed on your veh icle.
• Never u se tir e-rim combinations that have not been approved
by Audi.
& WARNING
Item s stored be tween the safety belt buckl e and the center
console can cause the sensors in the buckle to send the wrong
information to the ele ctroni c control module and prevent the
Advanced Airbag System from w orking properl y.
• Always make sure that nothing can interfere with the safety
belt buckles and that they a re not obstru cted .
<£> For the sake of the environment
Undeployed airbag modu les and pretensioners might be class ified as
Perc hlorate Mate rial -spe cial ha ndling may apply , see
www.dtsc.ca.gov/hazardouswaste/pe rchlorate . When the vehicle or
p arts of t he rest raint sys tem including a irbag mod ules and safe ty
belts with pretensioners are scrapped, all applicable laws and regula­
tions must be observed . Your authorize d Audi dea ler is familiar with
these requirements and we recommend that you have yo ur dealer
perform this serv ice for you. •
Knee airbags
Description of knee airbags
The airbag system can provide supplemental protect ion
to properly re str ained f ro n t seat occupants.
0
Fig. 21 6 Driv er' s
a ir ba g
The a irbag for the dr iver is located in the inst rument pane l under­
neath the steering wheel~ fig . 216, t he airbag for the passenger is
at abo ut the same height in t he instr ument panel underneath the
glove compartment.
Th e knee airbag offers addit ional protec tion to the dr ive r's and
passenger's knees and upper and lower thigh areas as a s upplement
t o the sa fety bel ts.
If the front a irbags dep loy, the knee airbags a lso deploy i n frontal
co llisions above a certain severity~
page 215, "More importan t
t hings to know abou t front airbags ".
Besides the ir no rma l safety function , safety belts work to help keep
t he drive r o r front passenger in po sit ion in c ase of a frontal collision
so that the a irbags can provide protection .
Th e airbag system is not a substitute for your safety belt . Rather, it is
pa rt of the ove rall occ upant re st ra int system in your veh icle. Always
remember t hat the airbag system can on ly help to protect you if you
are wearing your safety be lt and wear ing it pr operly . T his is why you ..

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When the system is dep loyed , the a irbags sta rt to fill with a propel­
lan t gas, and infla te be twee n the lower p art of th e ins tru men t pan el
and the driver and the lowe r part of the instrumen t panel a nd the
front passenge r=>
page 215, fig . 21 4.
Alt hough t hey are no t a soft pi llow, they can "cushi on" th e im pact
and in t his way they can he lp to reduce the risk of in jury to the lower
ext rem ities.
All this takes place i nstantaneously, so fast that many people don't
even rea lize that t he a irbags have deployed. The airbags also inflate
w ith a great dea l of force a nd it is importa nt fo r occupant safe ty tha t
nothing should be i n their way when they deploy .
Fully inf lated air bag s in co mbination with prope rly wo rn sa fety bel ts
slow down and limit the occupant's forward movement and help to
re duc e the ris k. •
Important safety instructions on the knee
airbag system
Air bags are on ly su pp le m en ta l r es tra ints. Always wea r
s af ety be lts c orre ctly and ride in a p rop er seating pos i­
tion.
The re is a lot that you and your passenge rs must know and do to help
t he sa fe ty be lts and a irbag s to prov ide s uppl em ent al p rot ectio n.
& WARNING
An inflating knee airbag can cause serious injury. Wearing safety
belts incorrectly and improper seating positions increase the risk
of seriou s personal injury and death whenever a vehicle is being
used.
• The airbag system cannot protect you properly if you are seated
too close to any of the airbag locations . When adjusting their seat
positions, it is important that both the driver and the front
& WARNING (co ntinued )
passenger keep their upper bodies and knees at the following
minimum safe di stances:
- 10 inches (25 cm) between the chest and the steering
wheel/instrument panel.
- 4 inches (10 cm) between the knees and the lower part of
the instrument panel.
• The risk of personal injury increases if you lean forward or to
the side, or if the seat is improperly positioned and you are not
wearing your safety belt. The risk increases even more should the
airbag deploy.
• Always make sure that the knee airbag can inflate without
interference. Objects between yourself and the airbag can increase
the risk of injury in an accident by interfering with the way the
airbag deploys or by being pushed into you as the airbag deploys .
- No persons (children ) or animals should ride in the footwell
in front of the passenger seat . If the airbag deploys, this can
result in serious or fatal injuries.
- No objects of any k ind should be carried in the footwell area
in front of the driver's or passenger 's seat. Bulky objects (shop­
ping bags, for example ) can hamper or prevent proper deploy­
ment of the airbag. Small objects can be thrown through the
vehicle if the airbag deploy s and injure you or your passengers.
• Make sure there are no cracks , deep scratches or other damage
in the area of the instrument panel where the knee airbags are
located.
• If children are incorrectly seated, their risk of injury increases
in the case of an accident =>
page 231, "Child Safety". •

lffll.,___C_h_ i_ ld _ S_ a_ f_ e_ t_:!, y :...._ _________________________________________ _
& WARNING (conti nued)
• Always install rear-facing child safet y seat s on the rear seat.
• If you must install a rearward facing child safety seat on the
front passenger seat in exceptional circumstances and the
PASSENGER AIR BAG
OFF light do es not come on and stay on,
immediately in stall the rear-facing child safety seat in a rea r
seating position and have the airbag system inspected immedi­
ately by you r Audi deale r.
& WARNING
If, in exceptional circumstances , you must in stall a forward-facing
child restraint on the front passenger' s seat:
• Always make sure the forward-facing seat has been designed
and certified by its manufacturer for use on a front seat with a
pas senger front and side airbag.
• Always follow the manufacturer 's instructions p rovided with
the child safety seat or carrier.
• Always move the passenger seat into its rearmost position
in
the seat's fore and aft adjustment range, as far away from the
airbag as possible before install ing the child restra int . The back­
re st must be adju sted to an upright position .
• Always make sure that the PASSENGER AIR BAG OFF light
c omes on and stays on all the time whenever the ignition is
switched on .•
Advanced front airbag system and children
Your vehicle is equipped with an "Advanced Airbag System" in compli­
ance wi th Uni ted St ates Federa l Mo to r Vehicle Safety St andar d
(FMVSS) 208 as applicable at the time your veh icle was manufac­
tu red . The Advanced A
irbag system in yo ur vehicle has been certif ied to
mee t the "low -r is k" requiremen ts fo r 3-and 6-ye ar old ch ildre n on
t he passenger side and small adults on the dr iver side . The low risk
dep loyment criteria are inten ded to reduce the risk of injury through
interaction with the a irbag t hat can occur, for example, by being too
close to the stee ring wheel an d instr ument panel when the airbag
inflates. In addi tion, the sy stem has been certified to comp ly with t he
"suppression" requirements of the Safety Standa rd, to t urn off the
fron t air bag for infan ts u p to 1 2 months who a re res tra ined on the
front passenger seat in child restrai nts that are listed in the Stan­
d ar d.
Even thoug h your vehicle is equipped with an Advanced Airbag
system , a ll ch ildren, especially those 12 years and yo unger, should
always r ide in t he back seat p roperly restrained for t heir ag e and si ze .
Th e ai rbag on the passenge r si de makes the front seat a potentia lly
dange rous p lace for a child to r ide. Th e front seat is not th e safest
place fo r a child in a forward- facing c hild safety seat. It can be a very
d an ge rous p lace for a n infan t or a large r chil d i n a re arwa rd-facing
seat. •
Advanced Airbags and the weight-sensing
mat in the front seat
Th e Advanced A irbag System i n your ve hicle de tects t he p resence o f
an infa nt o r ch ild in a child rest rai nt on the fro nt passenger sea t using
the we ight-sens ing mat in the seat cushion and the senso r be low the
saf ety belt la tch o n th e front passenge r seat tha t measur es t he
tension on the safety belt.
Th e weigh t-sens ing ma t me asures tot al we ight of the child and the
child safety seat and a child blanket on the fro nt passe nger seat . The
we ight on the fro nt passenger se at is re late d t o the desi gn of the
child res traint and i ts "footpri nt", the size and shape of t he bottom
of the ch ild restraint as it sits o n the seat . The weight of a child
restrain t an d its "foo tpr int" vary for differe nt kinds of child res tra ints .,_

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
acting on the vehicle, the brake pressure and the steering angle are
all meas ured.
The direction in which the driver wishes to travel is determined with
the aid of the steering angle and vehicle speed and is continually
compared with the actual behavior of the vehicle. If the two do not
match, for example , when the vehicle starts hydroplaning on a wet
road, ESP will automatically brake the appropriate wheel to correct
the problem.
The vehicle is then stabi lized by the forces acting on the whee l during
braking. If the vehicle is
oversteering (rear tends to skid out of the
turn), the brakes are main ly applied on the wheel that is on the
outs ide of the curve. In the case of a vehicle that is
understeering
(tendency to slide out of the curve), the brakes are applied at the rear
wheel that is on the inside of the curve. An acoustic signal ind icates
when ESP brake application cuts in =>
&.
Th e system operates across the entire speed range in combination
with the ABS system=>
page 256. If the Anti-Lock Brake System
(ABS) malfunctions, the ESP will be out of action as we ll.
Activation
When you turn on the engine, ESP will automatically be activated and
will perform a self-test .
The system can be activated or deactivated by pressing the button
=>
page 252, fig. 234 . The warning light comes on when the system
is switched off=>
page 16.
Normally, the ESP should always be on, however, it may be advanta­
geous to turn off the sys tem in certain special cases when some
degree of whee l spin is desired such as:
• when driving with snow chains
• when driving in deep snow or on a loose surface (to allow the
wheels to dig in to reach firm ground)
• when trying to "roc k" the vehicle free when it has become stuck.
The system should be reactivated once you are no longer in such situ­
ations.
Controls and equip­ ment Safety first Vehicle operation
Both the ABS and
EDS systems are still functioning even if the ESP is
switched off.
& WARNING
The Electroni c Stabilization Program is nevertheless subject to the
laws of physics. It is particularly important to pay attention to
this fact on wet and slippery roads. It is therefore important that
you always adapt your driving to the condition of the road and
traffic conditions. Do not allow the increased safety provided by
the Electronic Stabilization Program system to lull you into
accepting additional safety risks. •
Electronic differential lock (EDL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differential lock (EDL) helps the car to start moving,
acce lerate and climb a gradient on surfaces providing poor or almost
no grip . Without EDL, this would be difficult, if not impossible .
How the system works
The EDL operates automatically. It monitors the rotational speed of
the drive wheels on an axle with the he lp of the ABS sensors
=>
page 256 . If a noticeable difference in rotational speed between
the drive wheels on one axle is detected (e .g . on slippery ground
on
one side),
the spinning wheel is braked, thereby transferring power to
the other drive whee l or wheels (all -wheel drive). This is done up to a
speed of about 60 mph (100 km/h) . Noises from the brake system
signal that wheel spin is being contro lled.
Driving off
When driving off, always be sure to keep road conditions in mind as
you accelerate. If one drive wheel spins because it is on a surface with
less grip , gradually increase the pressure on the accelerator peda l
Iii>
Vehicle care Do-it-yourself service Technical data

Intelligent technology
'-----------------------------------------------
until the car starts to move . The whee l less ab le to transfer power
spins .
Overheating of brakes
To prevent the disc b rake of the bra ked wheel from ove rhea ting if
subjected to excessive loads, the EDL cuts out temporarily . The
veh icle remains operat ional and beh aves in the same way as a vehicle
without EDL .
As soon as the brake has coo led down, EDL switches on again auto­
matically .
& WARNING
• When a ccelerating on slippery surfaces, such as on ice or snow,
alw ay s be careful when depre ssing the a ccelerator pedal. E ven
with the EDL working, the drive wheel s can spin and reduce your
ability to control your car . Risk of crash !
• The in creased safety afforded by EDL does not mean that you
can take safety ri sks. Always adapt your driving st yle to the road
condition s and traffic situation .
fi Tips
If a fault occurs i n the ABS, the EDL is also no t fu nct ion ing . This is
indicated by the ABS warning light~
page 19. •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulati on System prevents the driven
wheels from spinning when the car is a ccel erating.
General notes
T he Anti-S lip Regulation System (ASR) is integrated in the electronic
stabilization program (ESP). When the veh icle starts up and acceler­
ates , the wheels are p reve nted from sp inning by adjust ing the eng ine
powe r to match t he amo unt of grip avai lab le from the road s urface.
How the system works
ASR perfo rms au toma tica lly, i .e . witho ut the drive r's in tervent ion .
With the aid of the A BS sensors~
page 256, ASR monitors the speed
of the driven wheels . If the wheels start to spin, the engine powe r is
reduced automat ically u nti l the t ires find enough gr ip to lock onto
the road s urface. The system is active across the entire speed range.
Th e ASR wor ks in con ju nction with the A BS .
If a m alfu nction sho uld
occur in the ABS, the ASR w ill also be out of action.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety ri sks . Always adapt your driving style to the road
condit ions and traffic situation.
[ i ] Tips
To ensure that the ASR works prope rly, all four wheels must be fitted
w ith ident ic a l ti res Any differences in rollin g radius of the tires can
cause the system to reduce engine power when t his is not desired .
See also ~
page 318, "N ew t ires and replacing tires and whee ls" .•
Braking
General Information
What affects b raking efficiency ?
Operating cond itions and driving habits
Th e bra kes on t oday's automo biles are still subjec t to we ar,
depending large ly on operating conditions a nd driving habits~ &.
O n ve hicles tha t are eithe r driven mostly in stop- and-go city t raff ic or
are drive n hard, the brake pads should be checked by your author ized
Audi de aler more o ften than specified in the
Warranty & Mainte­
nance booklet .
Failure to have your brake pads i nspected can result
in re duced brake pe rformance. .,

________________________________________ __;I:..: n~ t -=-e .=.:.: ll:.:.;igent technology .__==-
On steep s lopes , you shou ld use the brak ing effect of t he e ngine. This
w ay, y ou p revent unne ce ss ary we ar o n t he bra ke sys te m . If you mus t
use your brakes , do not ho ld the brakes down conti nuously . Pump the
bra kes at intervals.
Moisture or road salt
Under cer ta in c on di tions, for ex ample, when drivin g thr ough w at er or
very heavy rain, or e ve n after was hing your veh icle, the braking effect
c an be re duced due to moi st ur e (o r in freezi ng condi tio ns ice) o n the
bra ke pads . A few care ful b rake app lica tions should dry off the bra ke
pads or
remove any ice coatings .
Th e effec tiveness of the bra ke s ca n be re d uced whe n the vehicle is
driven on a salt-covered road and the brakes are not used . He re too,
yo u sh ould clean off a ccumula ted sa lt c oat ing from brake disc s and
pads with a few caref ul app lications of the brake::::;,&.
Corrosion
The re may be a tendency fo r dirt to build up on the bra ke pads and
cor ro si on t o fo rm on the di scs if t he c ar is not driven re gularly or o nly
for short t rips w ith litt le use of the bra kes.
If the bra kes are not used fre quent ly, o r if corrosion ha s fo rme d on
t he d iscs, i t is advisable to clean off t he pads and d is cs by bra king
fi rm ly a few t imes from a mo derately high speed ::::;,& .
Faults in the brake system
If yo u shou ld no tice a sudden in cre ase in b rake ped al t ravel, t hen one
o f t he two brake circ uits may have failed::::;,&.
Low brake fluid level
Malfunctions can occ ur in the brake system if the brake fluid level is
t o o low. The bra ke f lui d level is mon itored e lectroni cally.
Brake lining wear status
Brak e lining we ar may be checked by v isual inspec tio n o f the condi­
tion of the brake pads throug h the openings in the wheel. If neces­
sa ry, t he wheel m ay be re m oved f or this in spection ::::;,
page 335,
"C hanging a w hee l" .
Controls and equip­
ment Safety first Vehicle operation
& WARNING
•
You should perform braking maneuvers for the purpose of
cleaning the brake system only if road condition s permit. Other
road users must not be put at risk -you may cause an accident!
• Before descending a steep grade, reduce speed and shift trans ­
mission into a lower gear or lower driving range. Do not ride the
brakes or hold the pedal down too long or too often. This could
cause the brakes to get hot and diminish braking efficiency.
• Do not "ride the brakes " by resting your foot on the pedal when
you do not intend to brake. This may cause the brakes to overheat,
premature wear and increased stopping di stan ce.
• Under certain climatic and operating conditions such as
passing through water, driving in heavy rain or after washing the
vehicle, the effectiveness of the brakes can be reduced. In winter,
ice can accumulate on the brake pads , linings, discs and drums .
Carefully apply brakes for a test . Brakes will dry and ice coatings
will be cleaned off after a few careful brake applications.
• Driving for an extended period of time on salt-covered roads
without using your brakes can also affect braking efficiency. Clean
off accumulated salt coating from brake discs and pads with a few
careful brake applications.
• If you damage the front spoiler, or if you install a different
spoiler, be sure the air flow to the front brakes is not obstructed.
Otherwise the brake system could overheat reducing the effective­
ness of the entire brake system .
• Failure of one brake circuit will impair the braking capability
resulting in an increased stopping di stance . Avoid driving the
vehicle and have it towed to the nearest Audi dealer or qualified
workshop .•
Vehicle care Do-it-yourself service Technical data