2009 AUDI S8 catalytic converter

& WARNING !continued)
• Work with due care when handling the high-voltage section of
gas discharge (xenon) lights. Failure to do so could result in death
or serious injury.
[ i J Tips
Have the bulb replaced or the connection repaired by your autho ­
rized Audi Service department. •
Service interval display
The service interval display reminds you when your next
service is due.
Fig. 14 Display:
Service interval display
The date for service is calculated automatically. Based on the
average distance driven in previous months, a monthly driv ing
distance is calculated . As soon as the distance remaining to the next
service drops below the distance driven monthly, the service
reminder is initiated. The maximum period from one service to the
next is one year.
Service reminder
30 days b efore the next service is due, a service reminder appears
in the display when you turn on the ignition => fig. 14.
Contro ls and eq uip­
ment
Driver information display
After about 5 seconds the display switches back to normal. The
distance and time remaining are updated each time the ignition is
turned on until the date due for service is reached .
Service
When the due date for service is reached, the message Service due
! appears in the display immediately after you turn on the ignition.
Additionally, a warning tone sounds . After about 5 seconds the
display switches back to normal.
0 Note
If you disconnect the battery terminals, no calculations can be
made for the service interval display during this time and no service
reminder will appear . Remember that observing the proper service
intervals is vitally important to extending the life of your vehicle,
particularly the engine, and maintaining its value . Even if the
mileage driven is low, the maximum period of one year from one
service to the next must not be exceeded. •
On-Board Diagnostic system (OBD)
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (Mill in the instrument cluster
=>
page 16, fig. 7 is part of the On -Board Diagnostic (OBD II) system.
The warning/indicator light illuminates when the ignition is switched on and goes out after the engine starts and the idle has
stabilized. This indicates that the MIL is working properly.
If the light does not go out after the engine is started, or illuminates
while you are driving, a malfunction may exist in the engine system. If the light starts flashing , the catalytic converter could be damaged .
Continue driving
with reduced power (avoiding sustained high
speeds and/or rapid accelerations) and have the condition
corrected. Contact your author ized Audi dealer .
Vehicle care I I irechnical data

• ..__A_ u_ t _o_ m_ a_ t_ i_ c _ t_r _a _n_ s_ m_ is_ s_io _ n ________________________________________________ _
Select R only when the vehicle is at a full stop and the engine is
running at idle speed=>
& in "Driving the automatic transmission"
on
page 166.
Before you move the selector lever to R, press both the button in the
handle of the selector lever
and the brake pedal at the same time.
When the ignition is on, the backup lights illuminate when the
selector lever is moved into
R.
N -Neutral
The transmission is in neutral in this position. Shift to this position
for standing with the brakes applied =>
page 168 .
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the footbrake before and while moving the
lever out of
N.
D -Normal position for driving forward
Position Dis for normal city and highway driving. It ranges from zero
to top speed and all six gears shift automatically, depending on
engine load, driving speed and automatically selected shift
programs.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the foot brake before and while moving the
lever to
D out of N.
In certain circumstances it may be advantageous to temporarily
switch to the manual shift program to manually select gear ratios to
match specific driving conditions=>
page 170.
S -Sport position
Select this position for sportier performance. In this position, the
transmission will not upshift as soon, allowing the vehicle to use the increased power available at higher engine speeds to achieve live ­
lier acceleration.
When the vehicle is stationary or at speeds below 3 mph (5 km/h),
you must always apply the foot brake before and while moving the lever to
S out of N.
& WARNING
Read and follow all WARNINGS => & in "Driving the automatic
transmission" on
page 166.
0 Note
Coasting downhill with the transmission in N and the engine not
running will result in damage to the automatic transmission and
possibly the catalytic converter. •
Automatic Shift Lock (ASL)
Automatic shift lock prevents you from accidentally
shifting into a forward gear or into reverse, thus causing the vehicle to move unintentionally.
Fig. 187 Shift gate
selector lever lock
positions and interlock
button highl ighted
The selector lever lock is released as follows:
- Turn the ignition on.
Step on the brake pedal.
At the same time press and hold
the lock button on the side of the gear selector knob
=> fig. 187 with your thumb until you have moved the
selector lever to the desired position.
~

___ D_ r_iv _ in_... g"'- a_ n_ d_ e_ n_ v_i_r _o _n_ m_ e_n_ t _______________________________________________ _
New brake pads
--
Remember that new brake pads do not have a full braking
effect during the first 250 miles (400 kilometers) after they
are installed .
New brake pads have to be "burnished in" before they have optimal
grab =>& .
During the break -in period, you should avoid putting severe loads
on the brakes . Severe loads include, for examp le, sudden hard
braking, in particular at very high speeds or, for example, on moun­
tain passes.
& WARNING
New brake pads don't have the best stopping power and must be
"broken-in" during the initial 100 to 150 miles (150 to 200 kilome­
ters) of normal city driving. You can compensate for this by
pressing the brake pedal more firmly . This also applies later when
new pads are installed.
:J
Catalytic converter
It is very important that your emission control system
(catalytic converter) is functioning properly to ensure that
your vehicle is running in an environmentally sound
manner.
- Always use lead-free gasoline:=> page 303, "Fuel supply".
- Never run the tank down all the way to empty.
- Never put too much motor oil in your engine ==>
page 314,
"Adding engine oil 't=:;r\11
•
Never try to push- or tow-start your vehicle.
The catalytic converter is an efficient "clean-up" device built into the
exhaust system of the vehicle. The catalytic converter burns many
of the po llutants in the exhaust gas before they are released into the
atmosphere.
The exclusive use of unleaded fuel is critically important for the life
of the catalytic converter and proper functioning of the engine.
& WARNING
• Do not park or operate the vehicle in areas where the hot
exhaust system may come in contact with dry grass, brush, fuel
spill or other material which can cause a fire .
• Do not apply additional undercoating or rustproofing on or
near the exhaust manifold, exhaust pipes, catalytic converter or
heat shields. During driving, the substance used for undercoating
could overheat and cause a fire .
0 Note
• Be aware that just one tank filling with leaded fuel will alr eady
seriously degrade the performance of the catalytic converter.
• Do not exceed the correct engine oil level=>
page 314.
• Do not drive until the fuel tank becomes completely empty. The
engine could misfire. Unburned fuel could also get into the exhaust
system and this could cause the catalytic converter to overheat.
• Do not turn off the ignition while the vehicle is moving.
• Do not continue to operate your vehicle under these conditions,
as otherwise fuel can reach the catalytic converter. This could result
in overheating of the converter, requiring its replacement .
• To assure efficient operation of the Emission Control System:
- Have your vehicle maintained properly and in accordance with
the service recommendations in your Warranty
& Maintenance
booklet. •

The engine and catalytic converter have to reach their optimal oper­
ating temperature to reduce fuel consumption and noxious emis ­
sions effectively.
Just after starting, a cold engine in a mid -size car only achieves a
fuel economy of 6-8 miles per gallon (30-401/100 km). After about a
half a mile, fuel economy climbs to 12 mpg (201/100 kml. After about
2.5 miles (4 km), the engine is at its proper operating temperature
and fuel economy has reached a normal level. So you can see that
you should avo id short tr ips whenever possible.
The outside temperature is also critical in this regard. Your car
consumes more fuel in the winter than in the summer. •
Controls and equip­ ment Safety first Vehicle operation
Driving
and environment
Vehicle care Do-it-yourself service Technical data

___ C_ le_ a _ n_i_n ~g _ a_ n_ d __ p_r _o _t _e _c_ t_ i_o _n ___________________________________________ _
brake dust is also corrosive. If left on for too long, brake dust can
cause pitting.
Use on ly specia l
acid-free cleaners formulated for a lloy r ims . Safe
products are available at your Audi dealer. Never leave the cleaner
on the ri ms longer than specified on the label. If not rinsed of f
promptly, the acid contained in some c leaners can attack the
threads o n the wheel bo lts .
Never use abrasive or metal po lishing c leaning agents. If the protec ­
tive coating has been chipped, e.g . by kicked up road dirt, touch i t
up as soon as poss ible .
& WARNING
• Moisture and i ce on b rake s may affe ct b raking effi cien cy
~ page 272 , "General information ". Te st the brake s carefully ea ch
t ime you wa sh the vehi cle .
• Always read and heed all WARNINGS and other information
~ pag e 290. •
Body cavity sealing
The body cavity sealing does not nee d to be checked .
All body cavities which could be affected by corrosion have been
t horoughly pr otected a t the factory .
This sealing does not require any inspection or additional treat ­
ment . If any wax should seep out of the cavity when the ambient
temperature is high, it can be removed with a plastic scraper and a suitable solvent .
& WARNING
Solvents can be dangerous.
• Ben zine is fla mmab le and to xic . If you use be nzine fo r removing
the wax , keep sparks, f lame and lighted cigarettes away . Never
& W ARN ING (continued )
dump benz ine on the ground , into open streams or down sewage
dra in s.
• Be sure to observe all safety and env ironmental regulat ions .
Follow all in struction s on the cont ainer .
• Alway s read and heed all WARNINGS and other inform ation
~ page290 .•
Chassis
Have the u nderc oating c hecked for dama ge from tim e to
time.
T he lower body shell of your Audi is also thoroughly protected
aga inst corrosion .
Any damage to the undercoat ing caused by road hazards shou ld be
repaired promptly.
& WARNING
Too much undercoating in the wrong place s can cau se a fire .
• Do not app ly addition al undercoating or rustproofing on or
near the exhaust manifold, exhau st pipe s, catalytic converter or
he at shield s. While dr iving , the sub stance used for underco ating
could overhe at and cau se a fire .
• Alwa ys read and heed all WARNINGS and other info rm ation
=> page290 .•

•
Fuel supply and filling your fuel tank
Gasoline
Fuel supply Using the right fuel helps keep the environment clean and
prevents engine damage.
Fuel r ecomm end ati on
The fuel recommended for your vehic le is unl eade d prem ium grade
gaso line . See also ~
page 380, "Data". Audi recommends using TOP
T IER Detergent Gasoline with a minimum octane rating of 91 AKI (95
RON). For more information on TOP TIER Detergent Gaso line, please
go to the official website (www.toptiergas .com).
The recommended gasoline octane rating for your engine can also be found on a label located on the inside of the fuel fille r flap. This
rating may be specified as AK I or RON .
Your vehic le may also be operated us ing unleaded regular gasoline
with a minimum octane rating of 87 AKl/91 RON . However, using 87
AKl/9 1 RON octane fuel will slightly reduce engine performance.
Use unle ad ed ga so line only . Unleaded gaso line is avai lable
throughout the USA, Canada, and in most European countries. We
recommend that you do not take your vehicle to areas or countr ies
where un leaded gasoline may not be available .
For more information on refueling your vehicle, see~
page 304.
Octane ra tin g
Octane rating indicates a gaso line's ability to resist engine
damaging "knock" caused by premature ignition and detonation.
Therefore, buying the correct grade of gaso line is very important to
help prevent possible engine damage and a loss of engine perfor ­
mance.
F ue l supply and fillin g you r fu el tank
Gasoline most common ly used in the United States and Canada has
the following octane ratings that can usua lly be found on the filler
pump:
• Premium Grade : 91 -96 AKI
• Regular Grade: 87 -90 AKI
Explanation of the abbreviations:
AKI = Anti Knock Index= (R +M)/2 = (RON +MON)/2
RON = Research Octane Number
MON
= M otor Octane Number .
0 Note
• Do not use any fue l with octane ratings lower than 87 AKI or 91
RON otherwise expensive engine damage will occur .
• Do
not use leaded gasoline. The use of leaded gasoline w ill
severe ly damage your vehicle's catalytic converter and its abi lity to
control exhaust emissions. •
Blended gasoline
Use of g aso line containing alco hol or M TB E ( meth yl
t er tiary butyl e ther )
You may use unleaded gasoline blended with alcohol or MTBE
(commonly referred to as oxygenates) if the blended mixture meets
the follow ing criteria:
Bl end of g asoline m eth anol (wood al coho l or methyl alc oh ol)
• Anti-knock index must be 87 AKI or higher .
• Blend must contain no more than 3% methanol.
• Blend must contain more than 2% co-solvents.
Vehicle care I t •

11111...__F_ u_ s_ e_s _ a_n _ d_ b_ u_lb _ s _______________________________________________ _
No. Equipm ent
30 Vacant
31 On board power supply, light control (right
headlight)
32 Vacant
33 Left rear footwell heater
35 Vacant
36
37
38
39
40 Audi side assis
t
Cooler
On board po wer supply, light cont rol (left head­
light)
Door contro l unit, driver 's side
Power ste ering column adjus tment
41 Door contro l unit, rear left
42 Access/start control module
43 Adaptive Light, left
--44 Adaptive Light, right
Amps
30
25
5
15
30
7.5
25
7.5
25
10
10 •
Fuse Location , Instrument Panel right
Fig . 296 F use pa nel
l ay ou t
Some of the equipment items listed are optional or only available on
certain model configura tions.
Note that the following t able is accurate at th e tim e of go ing to
pr es s an d is subje ct to change . In the eve nt of di screp ancies, th e
l a bel on the in side of the cov er a lways ta k es prece dence .
The power window regulators and the power seats are protected by
cir cuit br eak ers, which automatically reset after a few seconds after
the over load - for example if a window is frozen - has been reme­
died .
No. Equipm ent
1 Parking brake
2
3
5
6
7
Air conditioning
Shi ft gate
Engine control
Oxygen sensor before the three-way
catalytic converter
Oxygen sensor behind the three-way
catalytic converter
Amp s
5
10
5
15
15
15
-

___ A_l.:,. p _h_ a_ b_e _t _i c_ a_l _i n_ d_e _x ____________________________________________ _
Driver information display
Driver information messages .. .... . 29
Introduction . ....... ... .. .... .... . 24
Open door or rear lid warning .. .... . 26
Outs ide temperature disp lay .... .... 25
Sound system display ... .. .. . .... . 25
Driver In forma tion Sys tem
Digital speedometer . . . . . . . . . . . . . . . 25
Driver's seat . . . . . . . . . . . . . . . . . . . . . . . . 87
Driver's seat memory . . . . . . . . . . . . . . . . . 94
Activating remote contro l key . ..... . 95
Recalling a seat position ...... .... . 94
Storing a seat position . ...... ..... . 94
Driving messages .................... 29
Driving safely ... .... ... .... ... .. ... 200
Driving time . .... .... .... .... .... .... 38
Dupl icate key . ........ ... .... .... ....
47
DVD player for navigation system . . . . . 112
E
Easy entry feature 129
Elect romechanica l parking brake
Emergency braking .... .... ... .... 136
Malfunction .. .... .... .... ... .... 136
Operation . . . . . . . . . . . . . . . . . . . . . . . 134
Parking . . . . . . . . . . . . . . . . . . . . . . . . . 135
Releasing and app lying .. .... ..... 134
Starting off with a trailer . .... ..... 136
Warning /indicator lights . .......... 22
Electronic differential lock (EDU How the system works . . . . . . . . . . . . 271
Warning/indicator lights . .... ..... . 21 Electronic immobili
ze r .. .. .... ..... 14 , 49
Electronic power control (EPC) warning/indicator light ... ..... 18
Electronic speed limiter .... .... .... ... 28
Electronic stabi li z ation program (ESP)
How the system works ....... .... . 270
Wa rning/indicator ligh ts ........... 18
Emergency braking . .......... .. ... . 136
Emergency closing Power sunroof . ... .... .... .... . 66 , 67
Emergency flasher . . . . . . . . . . . . . . . . . . . 73
Warning/indicator ligh ts ........... 19
Emergency locking . . . . . . . . . . . . . . . . . . . 54
Emergency locking of doors .. ... ... .. . 54
Emerg ency starting . ...... .. ... .... . 366
Emergency towing .. ... .. ... .. .. .... 368
Emergency warning triangle .. ... .... . 350
Energy management ... .. ..... ... ... 276
Battery power . . . . . . . . . . . . . . . . . . . 277
Driver no tification . . . . . . . . . . . . . . . . 277
Engine 4.2 1, 8-cylinder (350 hp) .... ... .... 310
6.0 I, 12 -cylinder (450 hp) . ...... ... 311
Compartment ... .... .... .... 3 10,311
Coolant . .. ...... ... ........ .. ... 316
Hood . .... .... .... .... ........ .. 308
Starting .. .... ... ..... ... ... 129, 130
Starting wi th jumper cables ... .... 366
Stopping ............ .... .... .... 131
Engine compartment ... .... .... ..... 310
Safety instructions .......... .... . 309
Working the engine compartment .. 309 Engine coolant
.. .. .. .. .. .... .... ... 316
Adding coolant ... .... .... .... ... 318
Checking the engine coolant level .. 317
Expans ion tank .... ... .... .... ... 317
Malfunction symbol ... .... .... .... 31
Radiator fan .... . ...... .... .. ... . 319
Temperature gauge ... .... .... .. .. 12
Engine data .. ..... .. . ... ... . .. .. .. . 380
Engine hood Closing ... .. .... .... .. .. . ... ... . 309
How to release the hood . . . . . . . . . . 308
Engine oil ... ..... .... .... .. . ... ... . 311
Adding ..... .... .... .. .. . ... ... . 314
Additives . ... .... .... .. .. . ... .... 314
Changing .... .... .... ... . ... .... 315
Checking the engine oil leve l ....... 313
Indications and conditions requir ing extra
checking .... .... .... ... .... ... 313
Oil consumption . ...... .. .. ... .. . 313
Oil grades ..... ... ... ...... ... .. . 311
Oil level symbol .. ........ .... ... .. 35
Pressure malfunction ...... .... .. . . 32
Recommended oil check intervals . . 313
Sensor defec tive . . . . . . . . . . . . . . . . . . 35
Speci fication and viscosity .. .... ... 311
Engine speed limitation . ... .. ... .... .. 35
Environment Break -in period ....... ........... 279
Catalytic converter .... ..... ...... 280
Disposing of your vehic le battery ... 324
Driving at high speeds ... .... ... .. 281
Driving to minimize pollution and noise . 281
Fuel .. ...... ....... ...... .... ... 305