service schedule AUDI S8 2009 Owners Manual

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.
& 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. Increased risk of an
accident cannot be compensated for 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.
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 whee l wil l 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 sti ll 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 whee l at
Controls and equip­
ment Safety first Vehicle operation
Intelligent technology
low speeds (for examp
le when parking), -more effort will be
requ ired than usual.
• Be aware of the different than usual steering response and
adjust your steering force accordingly .
• Have the problem checked and set right by an Audi dealer as
soon as possible.
[ i ] Tips
• When the engine is running, never hold the steering whee l
turned all the way to the right or to the left for longer than 15
seconds. The power steering pump will overheat the hydraulic fluid
if you keep holding the steering whee l turned a ll the way. This is
likely to damage the power steering system.
• If the power steering system shou ld fail entire ly, or if the engine
is not running (for examp le, while being towed), you will still be able
to steer the vehicle . However,
considerably more effort will be
required to do so.
• If the power steering system shou ld have a leak, or is not func ­
t ioning properly, contact your authorized Audi dealer immediately.
• The power steering system requires a special ly formulated
hydraulic fluid. The power steering reservoir is the one located most
forward on the left side of the engine compartment=>
page 310. The
correct fluid level in the reservoir is important for proper func­
tioning of the power steering .•
Driving with your q attro®
With All Wheel Drive, all four wheels are driven.
General information
With All Whee l Drive, power is distributed to all four wheels. This
happens automatically depending on your dr iving style and the
road conditions at the time. See also=>
page 271, "Electronic differ ­
entia l lock (EDU".
Vehicle care Do-it-yourself service Technical data

_______________________________________________ C _o_ n _ s_u _ m_ e_ r_l_n _f_o _ r_ m_ a_ t _i _o _ n __ lllll
re liabi lity . For detailed vehicle maintenance consult your Warranty &
M ain tena nce booklet .
Under diff icult operating condition s, for example at extreme ly low
outside temperatures, in very dusty regions, when towing a trai ler
very frequently, e tc ., som e serv ice work shou ld be p erfo rm ed
between the intervals specifie d. T his applies particu lar ly to:
• oil ch ang es, a nd
• cleaning or replacing the air filter.
<£> For the sake of the environment
By regularl y maintaining your vehicle, you help make su re that emis ­
s io n sta n da rds are ma intained, thus minimi zing a dvers e effe cts on
the environment. •
Important considerations for you and your
vehicle
The inc reasing use of elect ronics, sophisticated fue l injection and
e mi ssio n con tro l sy stems, a nd the gene ra lly i ncreas ing tec hn ica l
complexity of today's automobiles, have steadily reduced the scope
o f mai nte na nce a nd repairs wh ic h can be carr ied ou t by veh ic le
owners.
Also, safety and environmental concerns p lace very strict
l im it s o n the nat ure o f rep ai rs a nd adju stmen ts to engine a nd tra ns­
m ission parts which an owner can perform.
M aintena nce, adj ust m ent s and repairs u sua lly require special t ool s,
t est ing dev ices and o ther equipment ava ilab le to sp ecia lly trained
workshop personne l in order to assure p rope r performance, reli ­
ab ilit y and sa fety o f the vehicle a nd its many sys tems.
I mproper maintenance, adjustments and repairs can impair the
ope ra ti on a nd reliabil ity o f your vehi cle a nd even vo id your ve hicle
warranty. Therefore, proof of servicing in accordance with the main ­
t e nance sch ed ule may be a con diti on for upholding a poss ibl e
warranty claim made within the warranty period.
Controls and equip­ ment Safety first Vehicle operation
Above a
ll, operational safe ty can be adverse ly affected, creating
u nn ece ssary risks for you a nd your passenge rs .
I f in doubt about any servicing, have it done by your authorized Audi
dea ler or any other properly equipped and qualified workshop. We
str on gly ur ge you to g ive your au thorized Au di dea ler t he o pportu ­
nity to perform al l scheduled maintenance and necessary repairs.
Your dealer has t he facil ities, origina l pa rts and tra ined spec ialis ts
to keep your vehic le running proper ly.
Performing limited maintenance yourself
The fo llowing pages descr ibe a limited numbe r of procedu res wh ic h
ca n be perf ormed o n you r vehicle wi th ord ina ry tools, sho uld the
need arise and trained personne l be unavailab le. Befo re performing
any of t hese proc edures, a lways thor oug hly read all of the ap pli­
cable text and carefu lly fo llow the instruct ions given. Always rigor ­
ously observe the
WARNINGS provid ed .
Before you check anything in the engine compartment , al ways read
and heed all WARNINGS~
& and~ & in "Working in the engine
compa rtme nt" on
page 309.
& WARNING
• Serious personal injury may occur as a result of improperly
performed maintenance , adjustments or repairs .
• Always be extremely careful when working on the veh icle .
Always follow commonly accepted safety practices and general c ommon sense . Never risk personal injury .
• Do not attempt any of the maintenance, checks or repairs
descr ibed on the following pages if you are not fully fam iliar with
these or other procedures with respect to the vehicle , or are uncer ­
tain how to pro ceed .
• Do not do any work without the proper tools and equipment.
Have the necessary work done by your authorized Audi dealer or
another properly equipped and qualified workshop . _,.
Vehicle care Do-it-yourself service Tec hn ica l da ta