2008 AUDI S8 technical specifications

Fuel supply and filling your fuel tank
Blend of gasoline and ethanol (grain alcohol or ethyl alcohol}
• Anti -knock index must be 87 AKI or higher.
• Blend must not contain more than 10% ethanol.
Blend of gasoline and MTBE
• Anti-knock index must be 87 AKI or higher.
• Blend must contain not more than 15% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform especially well for
winter or summer driving. During seasonal change-over, we suggest
that you fill up at busy gas stations where the seasonal adjustment
is more likely to be made in time.
0 Note
• Methanol fuels which do not meet these requirements may
cause corrosion and damage to plastic and rubber components in
the fuel system.
• Do not use fuels that fail to meet the specified criteria in this
chapter.
• If you are unable to determine whether or not a particular fuel
blend meets the specifications, ask your service station or its fuel
supplier.
• Do not use fuel for which the contents cannot be identified.
• Fuel system damage and performance problems resulting from
the use of fuels different from those specified are not the responsi ­
bility of Audi and are not covered under the New Vehicle or the
Emission Control System Warranties.
• If you experience a loss of fuel economy or driveability and
performance problems due to the use of one of these fuel blends,
we recommend that you switch to unblended fuel. •
Gasoline additives
A major concern among many auto manufacturers is carbon
deposit build-up caused by the type of gasoline you use.
Although gasoline grades differ from one manufacturer to another,
they have certain things in common. All gasoline grades contain
substances that can cause deposits to collect on vital engine parts,
such as fuel injectors and intake valves. Although most gasoline
brands include additives to keep engine and fuel systems clean,
they are not equally effective.
Audi recommends using TOP TIER Detergent Gasoline. For more
information on TOP TIER Detergent Gasoline, please go to the offi­
cial website (www.toptiergas.com).
After an extended period of using inadequate fuels, carbon deposit
build -ups can rob your engine of peak performance.
(D Note
Damage or malfunction due to poor fuel quality is not covered by
the Audi New Vehicle Limited Warranty. •
Fuel tank
Fuel filler neck
The fuel filler neck is located on the right rear side panel behind the
fuel filler flap.
If the power locking system should fail, you can still open the flap
manually - for detailed instructions
see=> page 305.
You can find the fuel tank capacity of your vehicle in Technical Data
=> page 378. ~

-Checking and filling PW~---=---=----------------
It is not necessary to remove the battery from the luggage compart ­
ment, and it is also not necessa ry t o disco nnec t the cab les.
F a st ch arging th e batt ery ( charging rate above 14 .8
V olts )
For technical reasons do not use a battery charger that uses voltage
greater tha n 14.8 Vo lts to charge your veh ic le's battery.
& WARNING
C harging a b attery can be dangerou s.
• Always follow the operating in structions provided by the
battery charger manufacturer when ch arging your b attery .
• Never charge a frozen battery . It may expl ode because of ga s
t rapped in the ice . Allow a frozen batter y to tha w out fir st .
• Do not reu se batteries which were fro zen. The battery hou sing
m ay have cracked and weakened when the battery froze.
• Charge the battery in a well ventilated are a. Keep aw ay from
open flame or electric al spar k. Do not smoke . Hydr ogen gas gener ­
ated by the battery i s explosive.
• To reduc e the danger of e xplosion , never conne ct or dis conn ect
charger cable s while the charger i s oper ating.
• Fa st charging a batter y is dangerous and should only be
a ttempted by a competent technician with the proper equipment .
• Battery ac id that may spill during charging should be washed
off with a solution of warm water and b aking soda to neutralize
the a cid .
0 Note
Never use a fast charger as a booster to start the engine. This wil l
ser iously damage sens it ive elect ronic compo nents, such as control
units, r elays, radio , etc ., as wel l as the battery charger. •
Battery replacement
The new batte ry mus t have t he s ame s pecificati ons and
dimensions as the original equipment battery.
I ntel ligent energy management in your vehicle is responsible for
distr ibut ing the e lectr ica l energy throughout your veh icle
~ page 274. The inte lligent energy management system will keep
t he engine ba ttery charged be tter than vehicles without t his sys tem.
T o make sure the add it ional electr ical energy is avai lab le once aga in
after you have changed t he battery, we recommend that you ins tall
batteries of the same type and manufacture only (the same as those
insta lled at the time your vehicle was delivered). Specifications are
listed on the battery housing . Your authorized Audi dea ler wi ll then
code the battery management contro l unit .
The new battery must have the same capacity, voltage (12 volts), amperage, construction and p lug sea ling.
When instal ling the battery, make sure the ign ition and all elect rica l
consumers are turned off .
0 Note
Make sure the ventilation hose on the side of the battery is
connected, otherwise fumes or battery acid can leak out.
'£> For the sake of the environment
Because of the problem of proper disposal of a battery, we recom ­
mend your authorized Audi dealer change the battery for you.
Batteries contain sulfur ic acid and lead and must always be
disposed of proper ly i n compliance with all environmental regula­
tions . Disposing of vehicle batteries improper ly is very dangerous to
t he environment .•

______________________________________________ A_ l.!. p _h_ a_ b_e _ t_i c_ a..:..l ...:.. in :..:..:. d:..:e :..: x_;__ _,n
Kne e airbags ...... ... .. .... ..... 234 ASR
Moni to ring .. ... .... .... ....... .. 229 How the Anti-S lip Regu la tion Sys tem
PASSENGER AIR BAG OFF ligh t .... . 230 works ...... ... .... .... .... .... 270
Repairs ........ .... .... ......... 232
Safety instructions ... .... ... .... . 231
Side airbags ... .. .... .... ... .... . 237
Side curtain air bags (SIDEGUARD) .. 240
Warning/indicator lights ...... .... .. 19
Weight -sens ing mat ...... ... .... . 2 44
When mu st the syst em be insp ected?
229
Aircra ft
T ransporting your v ehicle .. ........ 369
All W hee l Dr ive ...... .... ... .... .... 273
Alloy whee ls ... .... .... .... ... .... .. 293
A ll-whee l drive
W int er tir es . ..... .... ... ... . .... . 34 1
A lternator
See Ge ne ra tor . ....... ... .... .... . 18
An ti-free ze
See Engine coolan t ..... .... .... .. 314
An ti- lock brak e system
How th e ABS syst em works ....... . 272
Wa rning /indi cato r ligh ts .. .. .. .... .. 21
Anti -Sl ip Reg ulat io n System (ASR)
H ow the system works .... .... .... 270
Anti -theft systems
Anti -theft alarm system .. ... .... ... 61
E lectron ic immob ilizer . .... .... .... 49
Ashtray Fron t .. .... ... .. .... ...... .... .. 106 Aud
i Service Repa ir Manua ls and Literatu re
380
A UTO mode
AC climate con tro l .. .. .... .... .... 117
Auto Safety Hotline .... .... .... ... .. . 207
A ut o-C heck Con trol ...... .... ... .... .. 28
Automatic belt retracto r ... .. .... .... . 213
Automati c car wash
See Washing . .............. .... .. 289
A ut om atic Sh ift Loc k (ASU . ...... .... . 165
Automat ic transmission
6 -speed automat ic t rans missio n .... 163
Auto matic S hift Lock (ASU .... .... . 165
Dr iving . ...... .... .... .... .... ... 163
Dynamic sh ift p rogram .. ...... .... 166
Em ergency release fo r selecto r leve r 168
F a il- safe mode . ...... .... .... .... 168
I gnition key s afety lock . ...... .... . 130
K ick -down .... .... .... .... ... .... 166
Manual sh ift program ....... .... .. 167
S ele ctor le ve r ... ........... .... .. 164
Shift buttons ... .... .... .... .... . 168
S teering wheel w ith tiptronic . ...... 168
Average speed . ...... .... .... .... ... . 38
Avo id damaging the ve hicle .. ...... ... 279
B
Rear . ...... .. ...... .... ......... 107 Background lighting . ...... .... ... .. .. 76 Ba
ttery .... ... .. .... .... ...... .... . 318
Ba ttery location ins ide the luggage
compa rtmen t ... .... ... .... .... . 319
Chargi ng .. .... .... ... .... .... ... 321
Impo rtant wa rnings when working on the
battery .. .... .... ... .... ...... . 319
low ...... .... .... .... ... .... .... 274
Replaci ng t he battery .. ... .... ... . 3 22
State of cha rge . ...... .... .... ... . 27 4
Winter operat ion ..... .... .... .. . . 318
Wo rking on the batte ry . ....... ... . 319
Battery vo ltage .. .. .. .... .... .... ..... 35
B efo re driving ... .... .... ...... .... . 199
Blended gasoline ... .. .... .... .... ... 30 1
Body cavity sealing ........ .... .... .. 294
Boos ter seat ... .. .... .... ... .... .... 251
How do I properly install a booster seat in my veh ic le? . .... .... ... .... .... 251
Safety instructions .. ...... .... ... . 251
Brake flu id
Changing the brake fluid ...... .... . 318
Check ing the brake fluid leve l .... .. 317
What is the co rrect brake fluid leve l? 317
What s hould I do i f th e brake fluid warning
l ight com es on? . .... .... .... .... 317
Brake system Ant i- lock brake sys tem .... .... .... . 21
B rake assis ta nt .... .... ... .... .... 272
Brake booster .. ... .... ... .... .... 271
Brake flu id . ... .... .... ... .... .... 317
Brake f luid specifications for ref ill and
replace men t . .... .... .... ...... . 318
Bra ke light de fective . .... . .... .. .. . 26
Brake pads . ...... .... ... .... .... 278
Controls and equip­
ment Safety first Vehicle operation
Vehicle care Do-it-yourself service Technical data

______________________________________________ A_ l_,_ p _h_ a_ b_e _t_ic _ a_l _in _ d_e _ x __ lll
T
Tachometer . .... .... .... ... .... .... . 13
Technical modifications ...... ...... .. 383
T emperature
Climate controls ...... .... ..... .. . 117
Setting for the driver's and front passen-
ger's side ... ...... .... ... .... .. 117
Tether strap ........................ 263
Securing the upper tether strap 264
The first 1,000 miles (1,500 km) and
afterwards .. .... .... ... .... .... 277
Tie -down eyelets ... .. .... ...... . 100, 207
Tips for the environment
Saving fuel ... .... .... ... .... .... 104
Using the air conditioner only when necessary ... .... ....... .... .... 123
ti ptron ic® . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Automatic Shift Lock (ASU ... .... .. 165
Driving .. .. .. .... .... ........... 163
Dynamic shift program . ...... ... .. 166
Fail -safe mode ... .... .... ...... .. 168
Kick -down ..... ...... .... ... .... . 166
Manual shift program ........ .... . 167
Se lector lever . .... .... ... .... .... 164
Tire pressure .. ... .. .... .... ...... .. 331
Tire pressure monitoring system ... .... 41
Displaying tire pressures . .... .... .. 43
Initialize wheels ... .... ... .... .... . 45
Learning process .................. 44
Loss of air pressure ............. 20, 42
Malfunctions .... .... .... .... .... . 45
Sensors ....... .. .... .... ...... .. 338
Controls and equip­ ment Safety first Stor
ing tire pressures ....... .... ... 44 Towing
Tires and wheels .. .... .... .... ... 338 Tow truck procedures .... .... .... . 366
Valves ..... .. .... .... .... .... ... 338
Towing hitch
Tire service life ........ .... ... .. .... 335
Audi parking system .............. 180
Tires ........ .... ... .... .... .... ... 324 Towing loop ..... .... .... ... .... .... 367
Replacing .. ...... .... ...... ... .. 338 front .... ... .. .... .... ...... ... .. 367
Service life . ........ .... ... .. .... 335 rear ............................ 368
speed rating letter code .. ... .. .... 338
Trailer towing . .... ... .... ...... ... .. 282
Tire manufacturing date ...... .... . 338
Operating instructions . ...... ... .. 283
Tire specifications ................ 337
Technical requirements ... .... 282, 283
Tread depth ........ ....... ...... 335
Trailer towing tips ................ 284
Uniform tire quality grading .... .... 340
Train
Winter tires ... .... .... .... .... ... 341
Transporting your vehicle .. .... .... 369
Tires and ve hicle load limits . ...... ... 333
Transmission
Tires and wheels
See Automatic transmission .. ...... 163
Checking tire pressure .... .... .... 331
Transport Canada . .... ... ........ ... 208
Cold tire inflation pressure .. .... ... 328
Dimensions ...................... 336 Transporting your vehicle
.... .... ... . 369
Tread Wear Indicator (TWI) ....... .... . 335
Genera l notes .................... 324
G lossary of tire and loading termino logy
325
New tires and whee ls .. .... .... ... 336
Replacing .... .... .... .... .... ... 337
Snow chains ........ .... ... .. .... 342 Trip computer
Fuel consumption .... .... .... .... . 38
Mi leage ... ........... .... .... .... 38
Sing le-trip memory .. ........ .... .. 39
Total-trip memory .. ...... ..... .. .. 39
Tire pressure monitoring system .... 338
Tires and vehicle load limits .. ...... 333
Wheel bolts .. ....... ...... .... ... 343 Trip
odometer ..... .. .... ....... ... .. 14
What does it mean when dEF appears in the trip odometer disp lay? ......... 14
Winter tires ......... ...... .... ... 341 Trunk
Tires/Wheels
See Rear lid ... .... .... ... .... .... . 55
Low aspect ratio tires . .... ........ 343 Trunk
escape handle .. .... ... .... .... 348
Tools ... .... .... ... .... .... .... .... 350 Turn signals
... .. .... .... .... ...... .. 73
Torn or frayed safety be lts .. .... .... .. 212 Warning/indicator
lights .. ........ .. 19
Touch-up paint . .... ... .... .... .... . 292
Vehicle operation Vehicle care Do-it-yourself service Technical data