2008 AUDI S8 fuel pressure

Tires a nd wh eels -
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U.S. DOT tire identification number
Sever snow cond itions
Ti re ply composition and materials used
Maximum load rating
Treadwear, traction and temperature grades
@ Maximum permissible inflation pressure
The tires and rims are essentia l parts of the vehicle 's design. The
tires and rims approved by Audi are special ly matched to the char­
acteristics of the vehic le and can make a major contribution to good
road hold ing and safe handling when in good cond ition and prop­
erly inf lated
=> .&, .
We recommend tha t all work on tires and wheels be performed by
an authorized Audi dea ler . They are familiar with recommended
procedures and have the necessary special too ls and spare parts as
we ll as the proper facilities for disposing of the old tires.
Authori zed Audi dea lers have the necessary information about tech ­
n ical requirements for insta lling or changing tires and rims.
R ep lac ing t ires and wh eels
Tires shou ld be replaced at least in pairs and not individual ly (for
examp le both front tires or both rear tires together).
Be sure to read and heed the informat ion to the tire pressure mon i­
toring
system => page 338.
Always buy replacement radial tires t hat have the same specifica ­
tions as the tires approved for your vehicle by Audi. Rep lacement
tires must always have the same load rating specification as the
origina l equipment or approved optional t ires listed in the table
=> page 328.
Audi -approved specification tires are specially matched to your
vehicle and its load limits, and can contribute to the important road- holding, driving characteristics, and safety of the vehicle
. The table
(=> page 328) lists specificat ions of the tires approved for the Audi
models covered by your Owner's Literature .
The tire pressure labe l located either on driver's side 8 -pil lar or
ins ide the fuel fi ller
flap( => page 328, fig. 273) lists the specifica­
tions of the original equipment tires installed on your vehicle at the
t ime it was manufactured.
Federa l law requires tire manufacturers to place standardized infor ­
mation on the sidewa ll of all
tires => page 336, fig . 276. This informa ­
tion identifies and describes the fundamental characteristics, the quality grade of the tire and a lso provides a tire identification
number for sa fety standard cert ificat ion and in case of a recall.
T ire s pec ificat ion s
Knowledge of tire specifications makes it easier to choose the
correct tires . Radial tires have the tire specifications marked on the
sidewall, for example :
255/45 R 18 99 H
This contains the fo llowing information:
P Indicates the tire is for passenger cars (where applicable)
255 Nominal tire width in mm of the tire from sidewall edge to side -
wa ll edge. In general, the larger the number, the wider the tire
45 Height/width ratio in percent (aspect ratio)
R Tire construction: Radial
18 Rim diameter code (in inches)
99 Load rat ing code
H Speed rat ing letter code
XL (or "xi", "EXTRA LOAD" or "RF") indicates that the tire is a "Rein­
forced" or an "Extra Load" tire
M +S (or "M/S") Indicates tha t the tire has some mud and snow capa ­
bility
The tires could a lso have the information of direction of rotation
=> page 324.
Vehicle care

lll'ffll_....:..A..:.;l~ p :..;h..:.; a= b..:e :..;t:.:..i c::..:: a.:..l .,;. in :..:..:. d:..;e :..;x..:..,_ ___________________________________________ _
Driver's seat memory . . . . . . . . . . . . . . . . . 94
Activating remote contro l key .. ... .. 95
Recalling a seat position ...... .... . 94
Storing a seat position ............. 94
Driving messages .................... 29
Dr ivingsafely .... .... .... ...... .... 198
Driving time .... ... .. .... .... ...... .. 38
Dup licate key ......... ............... 47
DVD p layer for navigation system . . . . . 112
E
Easy entry feature 129
Electromechanica l parking brake
Emergency braking ............... 136
Malfunction ........ .... .... .... . 136
Operation . . . . . . . . . . . . . . . . . . . . . . . 134
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 135
Re leasing and app lying .... .... ... 134
Starting
off with a trailer . ...... ... 136
Warning/indicator lights ........... 22
Electronic differential lock (EDU
How the system works . . . . . . . . . . . . 269
Warning/indicator lights ........... 21
Electronic immobilizer .. ...... ..... 14, 49
Electron ic power contro l
(EPC) warning/indicator light .. .... .. 18
Electronic speed limiter .. .. .. .... ..... 28
Electronic stabi lization program (ESP)
How the system works . . . . . . . . . . . . 268
Warning/indicator lights ........... 18
Emergency braking .. ....... .. ...... 136 Emergency
closing
Power sunroof ................. 67, 68
Emergency flasher . . . . . . . . . . . . . . . . . . . 73
Warning/indicator lights ..... ...... 19
Emergency locking ....... .... .... .... 54
Emergency locking of doors ........... 54
Emergency starting ........ .... ... .. 364
Emergency towing ..... .. .... .... ... 366
Emergency warning triangle ... ....... 348
Energy management .... .... ... .. ... 274
Battery power . . . . . . . . . . . . . . . . . . . 275
Driver notification ................ 275
Engine 4.2 I, 8-cylinder (350 hp) .... .... ... 308
6 .0 I, 12-cylinder (450 hp) .......... 309
Compartment . .... .... .... .. 308, 309
Coolant ......................... 314
Hood ... .. .... .... .... .... .... .. 306
Starting ...... .............. 129, 130
Starting with jumper cables .. ... .. 364
Stopping ........................ 131
Engine compartment ... .. .... .... ... 308
Safety instructions .......... ..... 307
Working the engine compartment .. 307
Engine coolant ..................... 314
Adding coolant ............. ..... 316
Checking the engine coo lant level .. 315
Expansion tank .................. 315
Malfunction symbo l ...... .... .... . 31
Radiator fan ...... .... .... .... ... 317
Temperature gauge . . . . . . . . . . . . . . . 12
Engine data ........................ 378 Engine hood
Closing ..... .. .... .... ...... ... . 307
How to release the hood . . . . . . . . . . 306
Engine oi l ..... ... .... .... .... ...... 309
Adding ......................... 312
Additives ........................ 312
Changing .. .... .... ..... .. .... .. 313
Checking the engine oil level ....... 311
Indica tions and conditions requiring extra
checking .. ...... .... ...... .... 311
Oil consumption ................. 311
Oil grades .. .... .... ... .... .... .. 309
Oil level symbol .... .... ...... ... .. 35
Pressure ma lfunction ... ... .... .... 32
Recommended oil check intervals .. 311
Sensor defective . . . . . . . . . . . . . . . . . . 35
Specification and viscosity ......... 309
Environment Break -in period .................. 277
Catalytic converter .... .... .... ... 278
Disposing of your vehicle battery ... 322
Driving at high speeds ....... ... .. 279
Driving to minimize pollution and noise .
279
Fuel ...... .... ........... .... ... 303
Fuel economy .......... .... .... .. 279
L eaks under your vehicle .......... 307
Le tting the vehicle stand and warm up ..
280
Proper disposal of drained brake fluid
318
Proper disposal of drained engine coolant . .... .... .... .... ....... 316

______________________________________________ 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