2010 AUDI S8 ABS

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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
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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. .,

lillill.a._...:I:..: n~ t .::.e::::..::.: ll~igent technology ,_ _______________________________________ _
Brake booster
The brake booster adds extra braking power.
The brake booster works with vacuum pressure which is created on ly
w hen the eng ine is ru nn ing =>& .
& WARNING
• Nev er let the vehicle roll to a stop w ith the engine shut off.
• If the brake booster is n ot working , for e xample when towing
your vehicle, or because the brake booster has som ehow been
damaged , the brake pedal must be pressed conside rably harder to
make up for the lack of booster assistan ce. •
Functioning of Anti-Lock Brake System
(ABS)
A BS prevents the wheels fr om locking up under braking.
The ABS co ntributes effectively to ve hicle contro l s i nee it preve nts the
w heels from
locking when the brakes a re applied. T his means that the
vehicle remains steerable and is less likely to skid .
With ABS you do not need to pump the brake. Just hold the brake
pedal down.
However, do not expect the A BS to shorten brak ing distance under all
circumstances. When driving on grave l o r on newly fa llen snow on top
of icy su rfaces, b raking distance may be even longer, therefore, under
these circumstances, it is especially important that you drive slowly
and w ith great care.
How the ABS system works
An automatic check is made w hen a speed of abo ut 4 mph (6 km/h) is
reached . When this happens, a pumping noise can be heard . If a
n ind iv idua l wheel begins to rotate too slow ly in relat ion to ve hicle
speed and tends to lo ck, the ABS automat ically redu ces bra ke pres ­
su re to p revent t hat wheel from lock ing.
Th is automatic adjustment process wi ll cause a
slight vib ration of
t he bra ke pedal and so me noises to al er t you tha t vehicle s peed mus t
be adapted to existing road and traff ic conditions.
& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tir e traction. Always adjust your driving
speed acco rding to the road and traffic conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra ri sks .
The ABS cannot ove rcome the laws of physics.
[I) Tips
• If ABS is not funct ioning properly, a warning light will come on.
See=>
page 19.
• If a fa ult occ urs in the ABS, the ED L is also not functioning . This is
ind icated by the A BS warn ing ligh t.•
Brake assistant
T he brake assistant is designed to achi eve the optimum
b ra king effect.
The b rake ass istant helps to i ncrease the effective brak ing power and
thus to achieve a shorter stopping distance. If the driver p resses the
bra ke pedal
very quickly, the brake assistan t automatically boosts t he
brak ing fo rce to the maximum level, up to the po int where the anti­
lo ck bra ke f un ct ion (ABS) intervenes to stop the whee ls from locking.
You shou ld then keep the brake pedal pressed unt il the ve hicle has
bra ked to t he required s peed . T he bra ke ass ist ant sw itches itse lf off
as soon as you re lease the brake pedal. ._

_________________________________________ I_ n_ t_ e_ ll_,igent technology ,__E~-
The brake assistant will not be operative if there is a malfunct io n in
t he ABS.
& WARNING
Plea se remember that the accident ri sk a lwa ys increa se s if you
d riv e too fast , especially in corne rs or on a slippery road , or if you
follow the vehi cle ahead of you too closely . In cre ased ri sk of an
accident cannot be compensated for e ven by the brake ass istant,
so always maintain a safe speed. •
Servotronic® - advanced power
steering system
The power steering systems uses th e power of the
running engine to allow precise steering with little effort.
Th e advanced Servotronic ® power steeri ng system senses the road
speed and electronically ad justs power assistance to provide
c omfortable and safe s teer ing response exa ctly matched to the
vehicle speed.
Powe r steering will not work if the engi ne is of f. As a resu lt, the
steer ing wheel will be hard to turn .
The power stee ring fluid level is checked during the sched uled main­
t enance se rvi ces.
0 Note
If the re is an ele ct roni c mal func tion, servotroni c will still f unction
like a conventional power steer ing system, prov iding a constant
steeri ng support force tha t is no lo nger propo rt iona te to the ve hicle
speed. This is most not iceab le when turn ing the steer ing wheel at low
speeds (for example when parking), -more effort will be required
than usual.
Controls and equip­ ment Safety first Vehicle operation
•
Be aware of the d ifferent than usual steering response and adjust
your stee rin g for ce acco rdi ng ly.
• Have the prob lem checked and set r ight by an A udi dea ler as soon
as possib le.
[ i ] Tips
• Whe n the eng ine is runni ng, neve r hold t he steering w hee l turned
all the way to the right or to t he left for longer than 15 seconds. The
powe r stee ring pump wi ll over heat the hydra ulic fluid if yo u keep
holding the steeri ng w heel tur ned all the way. This is likely to damage
the power steering system .
• If the power stee ring system shou ld fa il entire ly, or if the engine
is not r unning (fo r examp le, while being towed), you w ill still be a ble
to steer the vehicle. However,
considerably more effo rt will be
req uired to do so .
• If the power steering system s hou ld have a lea k, or is not func­
tioning properly, contact your authorized Au di dea ler immediate ly .
• The power steering system requ ires a specially formulated
hydra ulic fl uid. The power stee ring re se rvoir is t he one located mos t
forward o n the left side of the eng ine compa rtment=:>
page 290 . The
correct fluid leve l in the reservoir is important fo r proper f unctioning
of t he power steering. •
Dr"ving with your quattro®
With All Whee l Drive, all four wheels are driven .
General information
With All Wheel Drive, power is d istributed to all four wheels. This
happens au tom atically depending on you r d rivi ng style a nd the roa d
conditions at the time. See also=>
page 253, "Electronic different ial
lock (ED L)".
Vehicle care Do-it-yourself service Technical data

Trailer towing
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Trailer towing
Driving with a trailer
General information
Your Audi was designed primarily for passenger transpor ­
tation .
If you p lan to tow a t railer, p lease remember that the additional load
w ill affect durability, economy and performance.
Tr ailer towing not on ly p laces mo re s tress on the vehicle, it also calls
for more concentration from the driver.
For this reason, a lways follow the operating and dr iv ing inst ructions
prov ided and use common sense .
0 Note
If you are going to tow a trailer, you must activate the tra iler ope ra­
tion mode =>
page 179, "Towing a Trailer".
Technical requirements
Trailer hitch
Use a we igh t-car rying h itch co nform ing to the gross tra iler we ig ht.
The h itch must be suitab le for your vehicle and trailer and must be
mou nted securely o n th e vehi cle's ch assi s at a
techni cally sound loc a­
tion . Use only a trailer hitch with a removab le ball mount. Always
check wit h the t railer h itch manufactu rer to make sure that yo u are
using the correct h itch .
Do not use a bumper hitch.
The h itch mus t be installed in such a way t hat it does not in terfe re
w ith t he impact-absorb ing bumper system. No modifications shou ld be made to t
he veh icle exha ust and bra ke systems. From t ime to
time, check that a ll hitch mounting bo lts rema in securely fastened.
W hen you are no t tow in g a tra ile r, remove the t railer hit ch ball
mount. This prevents the hitc h from caus ing damage should your
vehicle be str uck from behind=>& .
Trailer brakes
If your trail er is e quipped w ith a b raking system, che ck to be s ure t hat
it conforms to all regulations.
T he tra ile r hydrau lic brake system m ust not be directly connected to
t he vehicle's hyd raulic b rake sys tem .
Safety chains
Always use safety chains between your veh icle and t he tra ile r.
Trailer lights
Trailer lights must meet all regulations. Be sure to check w ith your
Audi de aler fo r corr ec t wir ing , sw itches and re lays.
Mirrors
If you are unab le to see t he t raff ic be hind you using t he regular
outs ide mirrors, then you
must install extended mi rrors. It is impor­
t an t th at yo u
always ha ve clear vi sion to the re ar.
& WARNING
After removing the trailer hitch, do not store it in your vehicle. In
case of sudden braking , the hitch could fly forward and inju re you
or your passengers. •

-With chocks in place, slowly release the brakes until the
wheel chocks absorb the load.
- Turn the whee ls towards the curb .
- Apply the parking brake.
- Move the selector lever to
P.
When restarting after parking:
- Apply the foot brake.
- Start the eng ine .
- M ove the selector lever to
D.
-Release the parking brake and slowly pu ll out and away
from the wheel chocks .
- Stop and have someone retrieve the wheel chocks .
[ i ) Tips
If you move the se lector lever of the automat ic t ransm ission to P
before applying the parking brake and before blocking the whee ls,
yo u may have to use mo re force later to move the leve r out of t he
P
position. •
Controls and equip­
ment Safety first Vehicle operation
Vehicle care Do-it-yourself service Technical data

____________________________________________ C_l_e _a_ n_ in--= g=-- a_n_ d_ p ,__r_o _t_ e_ c_ t _ io_ n __ ,n
Your authorized Audi dealer can provide cleaning products that have
bee n tested and approved for your veh icle. •
Care of interior
MMI display
- Clean the MMI display with a soft clean cloth and an LCD
cleaner .
The MMI display can be cleaned with a professionally available "LCD
cleaner". The cloth should be slightly dampened with the cleaning
fluid to clean the d isp lay .
0 Not e
To avoid scratching the MMI display, you should never clean it dry. •
MMI terminal
- First clean the MMI terminal with a brush to remove dust
from the housing.
- Then wipe the MMI terminal with a clean, soft, slightly
damp c loth .
The MMI te rmi nal shou ld be cleaned with a b rush first so that no di rt
is trapped between the buttons and the housing. We recommend
giving the MM I termina l a final wipe w ith a cloth moistened with
water and dish wash ing detergent .
0 Note
To prevent damage, make sure that no fluid ever gets into the MMI
terminal. •
Safety first
Aluminum trim
Use only neutral-pH products to remove spots and deposits from
al uminum surfaces. Ch rome care prod ucts and al kaline cleaners w ill
attack aluminum surfaces and can damage them over t ime .
& WARNING
Alw ay s re ad and heed all WARNING S and other information
~ page 2 70. •
Fabrics and fabric coverings
Fabrics and fabr ic coverings (e .g . seats, door trim panels, etc.) should
be clean ed at regular interva ls with a vacuum cl eaner . T his removes
surfa ce di rt pa rt icl es which co uld become embedded in the fabr ic
through use . Steam cleaners should not be used, because the steam
tends to push the d irt deeper into the f abric and lock it there.
Norm al clean ing
Genera lly, we recommend using a soft sponge or a li nt-free
microfiber cloth to the clean fabric. Brushes should on ly be used for
ca rpets and floor mats , since other fab ric surfaces could be ha rmed
by brushes.
No rma l sur face sta ins can be cleaned us ing a commercially avai lab le
foam cleaner. Spread the foam on the surface of the fabr ic with a soft
sponge and work it in gently . Do not saturate the fabric. Then pat the
foam dry using absorbent , dry cloths (e .g. microfiber cloth) and
vacuum it after it has dried comp letely.
Clean ing stains
Sta ins caused by beverages (e .g. coffee, fruit juice, etc.) can be
treated with a mild detergent solut ion. Apply the detergent solut ion
with a sponge . In the case of stubborn stains, a detergent paste can
be applied directly to the stai n and worked into the fabric . After­
wards, use copious amounts of clean water to remove the remaining .,.
Vehicle care Technical data

-~_C_ le_ a_n_ i_ n_ g=- a_ n_d___. p_ ro_ t_e _c_ t_ i_o _n ___________________________________________ _
detergent. Apply the water with a damp cloth o r sponge a nd pat the
fabr ic dr y wi th a n ab sorb ent , dr y clot h.
Sta ins from choco late or makeup should have dete rge nt paste (e.g.
ox -gall soap) ru bbed into them . Afterwards, remove t he soap w ith
w at er ( damp s ponge).
Alcoho l can be used to treat sta ins from grease , oil, lipstick or a ba ll­
po int p en. Melte d gre ase o r dye mus t be p atted o ff usi ng absorbe nt
material. It may be necessary to ret reat t he areas with detergent
paste a nd water .
In the case of ge nera l soili ng o f th e upholste ry an d cover mater ia l, we
recommend hiring a specialist that has the equ ipment to clean the
sea t cover s and o ther fab ric su rf a ces by sh am poo ing and s pray
extractio n.
& WARNING
Always read and heed all WARNINGS and the information
~ page 270 .
(I) Tips
Ope n Velcro fasteners on yo ur clothing can damage the sea t cover.
Please make su re t hat Velc ro fasteners are closed .•
Plastic parts and instrument panel
Always use a clean cloth moistened in clear water to clean t hese
a reas. For pers iste nt dirt use a n Audi appr oved
solvent-free plas tic
cleaner /protectant.
& WARNING
Solvents can change the properties of some plastics and make it harder for the airbag to deploy.
& WARNING (co ntinued )
• Never clean the instrument panel or the surface of airbag
modules with cleaning products that contain solvents.
• Products containing solvents will make the surface of this part
porous.
• Serious injuries can result if plastic parts come loose when the
airbag is deployed .
• Always read and heed all WARNINGS and other information
~page 270.
0 Note
Cleaning agents contai ning solvents will attack the mate rial and can
c hange the w ay it behave s.•
App lies to vehicles: with na tural leather
Natural leather
A udi makes gre at effo rts to main tain the propert ies,
natura l loo k and f eel of inte rio r le a th er .
General
We offe r m any di fferen t types o f lea ther on ou r ve hicl es. Most are
differen t types of nappa leat her, which has a smooth s urface and
comes in va rious co lo rs .
Th e int ensity of the colo r de ter min es th e vi sual cha ra cte ris tic s an d
appea rance. If the s urface o f the leathe r has a typical natu ral look,
t hen the le a the r is a nappa lea ther tha t has bee n left in a relat ively
natura l condition. This leat he r offers partic ularly good comfort a nd
brea thes wel l. Fine veins, closed gr ains, insec t bit e s, sk in fol ds , and
subt le variations i n color rema in v isib le. These character ist ics demon­
stra te t hat the ma ter ia l is na tural.
N at ural nappa leat her i s not cov ered by a colo r finish.
It is therefor e
more sensitive to soiling and wea r, which is somethin g you need to ..,