2008 AUDI A4 AVANT lock

-Intelligent technology
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one side), the spinning wheel is braked, thereby transferring power
to the other drive wheel or wheels (all- wheel drivel. 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 control led.
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, gradual ly increase the pressure on the accelerator
pedal until the car starts to move. The wheel less able to transfer
power spins.
Overheating of brakes
To prevent the disc brake of the braked wheel from overheating if
subjected to excessive loads, the EDL cuts out temporarily. The
veh ic le remains operational and behaves in the same way as a
vehic le without EDL.
As soon as the brake has cooled down, EDL switches on again auto ­
matically.
& WARNING
• When accelerating on slippery surfaces, such as on ice or snow,
always be careful when depressing the accelerator pedal. Even
with the EDL working, the drive wheels can spin and reduce your
ability to control your car . - Risk of crash!
• The increased safety afforded by EDL does not mean that you
ca n take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i ] Tips
If a fault occurs in the ABS, the EDL is also not functioning. This is
indicated by the ABS warning
light => page 21. •
Anti-Slip Regulation System (ASR)
The Anti-Slip Regulation System prevents the driven
wheels from spinning when the car is accelerating.
General notes
The Anti-Slip Regulation System (ASR) is integrated in the electronic
stabilization program (ESP) . When the vehicle starts up and acceler­
ates, the wheels are prevented from sp inning by adjus tin g the
engine power to match the amount of grip availab le from the road
surface.
How the system works
ASR performs automatical ly, i.e . w ithout the driver's intervention.
With the aid of the ABS
sensors=> page 240, ASR monitors the
speed of the driven wheels. If the wheels start to spin, the engine
power is reduced automatically until the tires find enough grip to
lock onto the road surface. The system is active across the entire
speed range.
The ASR works in conjunction with the ABS. If a malfunction shou ld
occur in the ABS, the ASR will also be out of act ion.
Activation
The ESP is automatica lly activated when the eng ine is started, and
it performs a self-test. You can activate a deactivated ASR, if
requ ired, by pressing
t h e=> page 236, fig . 199 button .
Deactivation
You can deactivate the ASR, if required, by pressing the button (for
less than 3
seconds) => page 236, fig. 199. With the ASR deactivated,
the ESP check light flashes,
see=> page 22.
Normally, the ESP shou ld always be on, however, it may be advanta­
geous to turn off the system in certai n special cases when some
degree of wheel spin is desired such as :
• when driving with snow chains

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&, WARNING (continued )
• Before des cending a steep grade , reduce speed and shift trans­
mi ssion into a lo wer gear or lower driving po sition . Do not ride the
brake s or hold the pedal down too long or too often . This could
cau se the brake s to get hot and dimini sh braking efficiency .
• Do not ride the brakes by resting your foot on the ped al when
you do not intend to brake. This may cause the brakes to overheat, premature wear and in creased stopping distan ce.
• Under certain climati c and operating conditions such a s
passing through water, driving in heavy rain or after washing the
v ehicle , the effectiveness of the brakes can be reduced . In winter ,
ice can a ccumulate on the brake pads , linings , discs and drums .
Cautiously apply brakes for a te st. Brakes will dry and ice coating s
will be cleaned off after a few cautious brake applicat ions .
• Driving for an extended period of time on salt-co vered roads
without using your brakes can also affect braking effi ciency . Clean
off accumulated salt coating from brake discs and pads with a few
c autious brake appli cations .
• 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 distance . Avo id driving the
vehicle and have it towed to the nearest Audi dealer or qualified
workshop .•
Brake booster
T he brake booster add s ex tra braking power.
The bra ke booster works wit h vacuum pressure which is created
only whe n th e e ng in e is
runn ing=> &,.
& WARNING
• Never let the vehi cle roll to a stop with the engine shut off .
• If the brake booster is not working , for example when towing
your vehicle , or because the brake booster has somehow been
damaged, the brake pedal must be pre ssed considerably harder to
make up for the lack of booster assistance . •
Functioning of Anti-Lock Brake System (ABS)
A BS preven ts th e wh eels fr om lock ing up und er b rak ing.
T he ABS contributes effectively to vehicle contro l since it prevents
th e w heels from
lo cki ng w he n t he brakes a re a ppli ed. T h is mea ns
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 that the ABS shortens braking distance
u nder all circum sta nces. Whe n driving o n gravel or on newly fa lle n
snow on top of icy surfaces, braking distance may be even longer,
t herefore, under these ci rcums tances, it is espec ial ly i mpo rtant th at
you driv e slowly and with great care.
How the ABS system works
An automatic check is made when a speed of about 4 mph (6 km/h)
i s r eac hed . Wh en th is happe ns, a pumpi ng noi se can be hea rd.
I f a n indiv idual wheel be gins to rotat e too slowly i n relation to
vehic le speed and tends to lock, the ABS automatical ly reduces
brake pressur e to prevent tha t whee l from loc king .
Th is a utomatic adjustment process wi ll cause a
slight vibration of
t he brake peda l a nd s om e noi ses t o a lert y ou th at ve hicle spee d
must be adapted to existing road and traffic conditions. _..

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& WARNING
Although the ABS is very effective, always remember that braking
capability is limited by tire traction. Always adjust your driving
speed according to the road and traffic conditions. Do not let the
extra safety afforded by the ABS tempt you into taking extra risks.
The ABS cannot overcome the laws of physics.
[ i] Tips
• If ABS is not functioning properly, a warning light will come on.
See~ page 21.
• If a fault occurs in the ABS , the EDL is also not functioning. This
is indicated by the ABS warning light. •
Brake assistant
The brake assistant is designed to achieve the optimum
braking effect.
The brake assistant helps to increase the effective braking power
and thus to achieve a shorter stopping distance . If the driver
presses the brake pedal very quickly, the brake assistant automati ­
cally boosts the braking force to the maximum level, up to the point
where the anti-lock brake function (ABS) intervenes to stop the
wheels from locking. You should then keep the brake pedal pressed
until the vehicle has braked to the required speed. The brake assis ­
tant switches itself off as soon as you release the brake pedal.
The brake assistant will not be operative if there is a malfunction in
the ABS.
Controls and equip­
ment Safety first
Vehicle operation
& WARNING
Please remember that the accident risk always increases if you
drive too fast, especially in corners or on a slippery road, or if you
follow the vehicle ahead of you too closely. An increased accident
risk cannot be compensated even by the brake assistant, so
always maintain a safe speed. •
Servotronic® -advanced power
steering system
The power steering systems uses the power of the
running engine to allow precise steering with little effort. Your Audi is equipped with the electronically controlled
Servotronic® advanced power steering system. It adjusts
the degree of steering assistance to the roadspeed.
The advanced Servotronic ® power steering system senses the road
speed and electronically adjusts power assistance to provide
comfortable and safe steering response exactly matched to the
vehicle speed .
Power steering will not work if the engine is off. As a result, the
steering wheel will be hard to turn.
The power steering fluid level is checked during the scheduled
maintenance services.
0 Note
If there is an electronic malfunction, servotronic will still function
like a conventional power steering system, providing a constant
steering support force that is no longer proportionate to the vehicle
speed . This is most noticeable when turning the steering wheel at
low speeds (for example when parking), -more effort will be
required than usual.
.,.
Vehicle care Do-it-yourself service Technical data

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• Be aware of the different than usua l steering response and
adjus t you r steer ing forc e acc ordin gly.
• Have the prob lem checked and set right by an Audi dea ler as
s o on as poss ible.
[ i] Tips
• When t he engi ne is running, never ho ld t he steer ing w heel
turned all the way to the right or to the left for longer than 15
seco nds. Th e powe r steering p ump w ill ove rhea t th e hydra ulic flu id
if you keep holding the steer ing whee l turned a ll the way . T his is
l ike ly to d amage t he powe r stee ring sys tem.
• I f the power steering system should fail entirely, or if the engine
i s not r unning ( for e xa mpl e, while being t owed), you will still be able
to steer the vehicle . However,
considerably more effort wil l be
r e q uired to do s o.
• I f the power steering system should have a lea k, or is not func ­
t ioning pr operly, co nt ac t yo ur auth orize d Audi deale r immedia tely.
• T he power steering system requires a specia lly formu lated
h ydraulic fluid. T he power s teeri ng reserv oir is th e one loca ted m ost
forward on the left side of the engine
compartment=> page 265,
"Engine co mpartme nt". The c orrect f luid level in the reservoir is
important for proper functioning of the power steering .•
Ap plies to veh icl es : w ith A ll Whee l Dr ive
Driving with your quattro®
Wit h All Whe el Dr ive, all fo ur w heel s are d riven .
Gen eral information
With All W heel Dr ive, powe r is d istributed to all four w hee ls . T hi s
happens automatica lly depending on your dr iving style and the
r oa d c ondit ions at th e time. See
also => page 237, "Elec tronic diff er­
entia l lock (E DU" .
Winter tires
When driv ing in th e win te r, yo ur ve hicle with All Wheel Drive ha s an
advantage, even with regular t ires. In winter road conditions it may
b e advi sable to m ount win ter tires ( or all -s easo n tires) for impr oved
driveabi lit y and braking : th ese tires mus t be moun ted on
all four
wheels .
See also => page 31 0, "Winter tires".
Snow chains
Whe re snow cha ins a re ma ndato ry on certai n roa ds, th is norma lly
a lso app lies to veh ic les with a ll-wheel
dr ive=> page 311, "Snow
chain s".
Replacing wheels /tires
Ve hicles wit h All Wheel D rive mu st always have t ires of the sa me
size . A lso avo id tires with different tread depths . For details see
page
=> page 305 .
Off-Road dri ving?
Yo ur Au di d oes not have e nough gr ound clea ra nce to be use d as an
off -road vehic le . It is therefore best to avoid rough tracks and
u neven te rr ain as much as poss ible . Also refe r
to => page 2 45.
& WARNING
Alway s adjust your driving to road and traffic condition s. Do not
let the extra safety afforded by the all -wheel drive tempt you into
taking extra risks .
• Although the quattro ®all-wheel drive is very effective, always
remember that braking capacity is limited by tire traction. You
should therefore not drive at e xcessive speeds on icy or slippery
road surfaces.
• On wet road surfaces , be careful not to drive too fast be cause
the front wheels could begin to slide on top of the water (hydro ­
planing ). If this should occur , you will have no warning from a
sudden increase in engine speed as with a front -wheel drive
vehicle . Always drive at speeds which are adjusted to the road
conditions - risk of crash! •

Traile r to win g -______________ _,..,_l'flllll
[ i] Tip s
• Do not tow a trailer during the break-in period of your vehicle.
• If you tow a trailer, your Audi may require more frequent mainte ­
nance due to the extra load
=> page 346 . •
Parking on a slope
Do not park with a trailer on a slope. If it cannot be
avoided, do so only after doing the following:
Wh en p arkin g:
-Apply the foot brake.
- Have someone place chocks under both the veh ic le and
the trailer wheels .
- Wit h chocks in p lace, s lowly release t he brakes until
wheel blocks absorb t he load.
- T urn t he wheels towards the curb .
- Apply the parking brake.
- Place an automatic transmission in
P , respect ively a
manual transmission in first or reverse gear.
Wh en re starting aft er p arking:
- Start the e ngine .
- Shift transmission into gear.
- Re lease the parking brake and slowly pull out and away
from the wheel blocks.
- Stop and have someone retrieve the whee l blocks.
Controls and equip­
ment Safety first Vehicle operation
[ i
] Tip s
If you move the selector lever of the automatic transmission to P
before applying the parking brake and before blocking the wheels,
you may have to use more force later to move the lever out of the
P
position .•
Vehicle care Do-it-yourself service Technical data

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Chassis
Have the undercoating checke d for dam age from time to
ti m e.
The lower body shell of your Audi is a lso thoroughly protected
against corros ion.
Any damage to the undercoating caused by road hazards shou ld be
repa ired promptly.
& WARNING
Too mu ch undercoating in the wrong place s can cause a fire.
• Do not apply additional undercoating or ru stproofing on or
near the e xhau st manifold , ex haust pipe s, cata lyti c con verter or
heat sh ields . While driving , the sub stance used for underco ating
could overheat and cau se a fire.
• Alw ays read and heed all WARNINGS and other informat ion
=> pa ge 254 . •
Care of interior
Aluminum trim
Use on ly neutral-pH products to remove spots and depos its from
a lum inum surfaces. Chrome care products and alka line cleaners
wi ll attack aluminum s urfaces and ca n damage them over t ime.
& WARNING
Alway s re ad and heed all WARNING S and the inform ation
=> pag e 254. •
Ap plies to veh ic les: with Fab rics an d fabric cove rings
Fabrics and fabric coverings
Fabrics a nd fabr ic coverings (e .g. seats, doo r tr im panels, etc .)
shou ld be c leaned at regular intervals with a vacuum cleaner. This
re moves surface d irt part ic les which could become embedded in
the fabric through use . Steam cleaners shou ld not be used, because
the steam tends to push the dirt deeper into the fab ric a nd lock it
there .
Norm al cleaning
Genera lly, we recommend using a soft sponge or a lint -free
m icrof iber c lo th to the clean fabric . Brushes should on ly be used for
carpets and floor mats, since other fabric surfaces could be harmed
by brushes.
Norma l sur face stains ca n be cleaned us ing a commercially ava il­
able foam cleaner. Spread the foam on the surface of the fabric with
a soft sponge and work it in ge ntly . Do not saturate t he fabr ic. Then
pat the foam dry us ing absorbent, dry cloths (e .g . microfiber cloth)
a n d vacuum i t after it has dr ied comple tely.
Cleaning stains
Stains caused by beverages (e .g. coffee, fru it ju ice, etc.l can be
treated with a mild detergent solution. Apply the detergent so lution
with a sponge . In the case of stubborn stains, a de tergen t paste can
be applied direct ly to the stain and worked into the fabric . After ­
wards, use c opious a mounts of c lean water to rem ove the
remaining detergent . Apply the water with a damp cloth or sponge
a n d pat the fabric dry with an absorbe nt, dry c loth .
Stains from choco late or makeup should have detergent paste (e .g.
ox -ga ll soap) rubbed into them. Afterwards, remove the soap with
water (damp sponge).
A lcoho l can be used to treat stains from grease, oi l, lipstick or a ba ll­
point pen . Melted grease or dye must be patted off us ing abs orbent
material. It may be necessary to retreat the areas with detergent
paste and water . .,,,
Vehicle care

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soiling, etc.I, you will need to be somewhat careful with these
leathers, and a certain type of care is required. For example, dark
clothing materials can discolor leather seats (especially if such
clothing is damp and was not dyed correctly). Dust and dirt particles
in pores, folds, and seams can have an abrasive effect and can
damage the leather surface as well as weaken seams.
The leather shou ld be c leaned regularly as needed. After having
been used for a relatively long time, your leather seats will acquire
a rich aged finish . This is a characteristic of natural leather and a
sign of true quality.
In order to maintain the value of this natural product over the life of
your vehic le , you should fo llow the recommendations below:
0 Note
• To keep your leather from bleaching out, do not allow it to be
exposed to bright sunlight for long periods of time. If you have to
leave the vehicle parked outside for long periods, cover the leather
to protect it from direct exposure to sunlight.
• Sharp objects on c lothing, such as zippers, rivets or sharp pieces
on belts can leave permanent scratches or scrape marks on the
surface of the leather.
[ i ] Tips
• After each time you clean the leather and at regu lar intervals, use
a leather preservative creme that contains UV -blockers and that
works into the leather. This creme wil l nourish and moisturize the
leather, helping it to breathe and stay supple . It also helps to build
up a protective coating on the surface .
• Clean the leather every 2 -3 months, and clean any areas that get
soiled.
• Remove fresh marks made by ballpoint pens, ink, lipstick, shoe
polish, etc . as soon as possible.
• Preserve the color of the leather as needed by using a special
colored leather care creme to touch up areas of uneven color .•
• I I • • I
Ap plies to veh ic les : wi th n atural leat her
Cleaning and caring for leather upholstery
and trim
Natural leather requires special care and attention.
Normal cleaning
-Clean soiled areas with a slightly moistened cotton or
woolen cloth.
More stubborn dirt
-More stubborn dirt can be removed using a cloth satu­
rated with a mild soap solution (2 tablespoons mild
liquid soap).
-Never allow the soap solution to saturate the leather, and
make certain that no water soaks into the seams.
Wipe off the soap solution with a soft, dry cloth .
Cleaning spots
-Remove fresh water-based spots (such as coffee, tea,
juices, blood) with an absorbent cloth or paper towel.
-Remove fresh grease or oil-based spots (such as butter,
mayonnaise, chocolate) with an absorbent cloth or paper
towel, or use the cleaner from the leather care kit if the
spot has not yet penetrated into the surface of the
leather.
-Use an oil/grease dissolving spray, if oil/grease spots
have dried on.
-Remove specific kinds of spots (ballpoint pen, felt
marker, fingernail polish, water-based paint, shoe polish,
etc.) with a spot remover specifically formulated for
leather. _.,
Vehicle care

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Safety belts
Only well-maintained safety belts work reliably when
needed.
- Keep belts clean.
- For cleaning, use a mild soap and water solution. Let
belts dry thoroughly and away from direct sunlight.
- Do not allow inertia reel safety belts to retract before
they are completely dry.
- Check the condition of your safety belts
regularly.
Heavily soiled safety belts may not retract properly.
& WARNING
Damaged safety belts can break in a crash.
• Anything that might damage your safety belts could mean that
you and your passengers would not be adequately protected in an
accident.
• Safety belt performance depends on correct installation. Never
remove belts from the vehicle to clean them.
• Do not use chemical cleaning agents, bleach or dyes. They have
corrosive properties which weaken the webbing.
• When cleaning your safety belts, inspect them for damage. If
you discover damage, see your Audi dealer.
• Always read and heed all WARNINGS and the information
=> page 254. •
Engine compartment
Be especially careful when cleaning the engine compart­
ment.
Always switch off the ignition before cleaning the engine => &.
Plenum panel
Remove leaves from the plenum panel in front of the windshield
under the engine hood. This prevents the water drain holes from
becoming blocked, and it prevents debris from entering the vehicle
interior through the heating and ventilation ducts .
Corrosion protection
The engine compartment and transmission have been corrosion­
protected at the factory.
Good anti-corrosion treatment is very important, particularly in the
winter. If the vehicle is frequently driven on salt treated roads, the
entire engine compartment and plenum panel should be thor ­
oughly cleaned at the end of winter and retreated to prevent salt
damage. At the same time, the underside of the vehicle should be
washed as well.
If the engine compartment is cleaned at any time with grease
removing solutions
21 , or if you have the engine washed , the anti­
corrosion treatment is almost always removed as well. It is therefore
essential to have a long-lasting corrosion protection reapplied to all
surfaces, seams, joints and components in the engine compart ­
ment.
& WARNING
Be aware: the engine compartment of any motor vehicle is a
potentially hazardous area.
• Before working in the engine compartment, be sure to read the
information
=> page 265 . .,,_
21 Use only the corr ect cleaning solutions. Never use gasoline or diesel fuel.
Vehicle care