2008 AUDI S8 engine

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Warm and cold
Climate controls
Description
The air conditioner is fully automatic and is designed to
maintain a comfortable and uniform climate inside the
vehicle.
We recommend the following settings:
- Set the temperature to 75 °F (+23 °C).
- Press the !AUTO
I button.
With this setting, you attain maximum comfort in the least amount
of time. Change this setting, as desired, to meet your personal needs.
The climate controls are a combination of heating, ventilation and cooling systems, which automatically reduce humidity and cool the
air inside your vehicle.
The air temperature, air flow and air distribution are automatically
regulated to achieve and maintain the desired passenger compart­
ment temperature as quickly as possible.
The system automatically compensates for changes in outside
temperature and for the intensity of the sunlight entering the
vehicle. We recommend you use the
Automatic mode=> page 117
for year -round comfort.
Please note the following:
Turn on the air conditioner to reduce humidity in the vehicle. This also prevents the windows from fogging up.
When the outside temperature is high and the air is very humid ,
condensation from the evaporator may drip under the vehicle. This
is normal and does not indicate a leak. If the outside temperature is
low, the fan normally only switches to
a higher speed once the engine coolant has warmed up sufficiently.
The air conditioner temporarily switches off when you drive off from
a standstill using full throttle to save engine power.
The compressor also switches off if the coolant temperature is too high, so that the engine can be adequately cooled under extreme
loads.
Air pollutants filter
The air pollutants filter (a combined particle filter and activated
charcoal filter) reduces or prevents outside air pollution (dust, or pollen) from entering the vehicle.
The air pollutants filter must be changed at the intervals specified
in your Warranty
& Maintenance booklet, so that the air conditioner
can properly work.
If you drive your vehicle in an area with high air pollution, the filter
may need to be changed more frequently than specified in your
Audi Warranty
& Maintenance booklet. If in doubt, ask your autho­
rized Audi Service Advisor for advice.
Key coded settings
The air conditioner settings selected are automatically stored and
assigned to the key being used. When the vehicle is started, the air
conditioner automatically selects the settings assigned to that key.
This way every driver will maintain his/her own personal settings
and does not have to reset them manually.
If a different driver uses your key and changes the air conditioner
settings, the latest adjustments will erase and replace the settings
you have stored.
Energy management
To prevent the battery from being discharged and to restore the
balance of energy, components which require large amounts of

Warm and cold -
------------------------------..J
[ i J Tip s
If the climate control system is operating in cool ing mode, air flows
primarily from the outlets in the center console and in the door
pillars . To achieve adequate cooling, you should never close the
out lets completely. •
Using climate controls economically
Using the climate controls prudently can help save fuel.
When you use t he a ir conditioner, engine power is reduced
and fuel consumption increases. To save fuel, you should
use the a ir co nditioner only when necessary. Also please
note the follow ing po ints:
- If you want to save fuel, activate ECON.
If you are going to drive with the windows open, use ECON.
W For the s ake of the environm ent
By reducing the amount of fuel you use, you also reduce the amount
of pollutants emitted into the air. •
Applies to v ehicl es: with so lar slidi ng /tilt ing sunr oof
Solar blower fan /solar roof
With sufficient sunlight, the blower fan continues to
operate with solar energy to bring in fresh air after the
ignition has been switched off.
T he fan motor is operated by solar energy through the solar roof
after the igni tion is turned off. P lease make certa in that
vents ©
and© are open to achieve optimal ventilation ~ page 122, fig. 137 .
Controls a nd eq uip­
ment
The ventilation operates only with the sunroof c losed or in the tilted
position.
If the vehicle was switched off in the recirculation mode, the air
conditioning automatica lly switches to fresh air operation .
Solar operation is not activated at low outside temperatures .•
Windshield defogging/defrosting
Ap plie s to v ehic le s : with windsh ield defogg er/defr oste r
Windshield defogger /defroster ®
The win dshield defogger rem oves humidity from the
windshield.
F ig. 138 Win dsh ield
d efogger sw itc h
- Press the@ button to turn the w indshield defogger on
and
off ~ fig. 138 .
The w indshield defogger works only when the engine is running .
The indicator light in the button illuminates when the windshield defogger is turned on .
With a cold engine at outside temperatures below 41 °F (+5 °C) and in !AU TO
l operation , the windshield defogger turns on automati ­
cally . Depending on outside temperature, the windshie ld is heated .._
Vehicle care I I irechnical data

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for a maximum of 4 minutes. The temperature for the climate
control must be selected so that it is operating in the heating mode.
When selecting the program setting
®, the windshield
defogger/defroster is switched on automatically at outside temper ­
atures below 41 °F (+5
°Cl. Depend ing on outside temperature, the
windshield is heated from 2 up to a maximum of 4 minutes.
The windshield defogger is deactivated in ECON mode .
[ i J Tips
• If a crack forms in the windshield due to a foreign object (e .g . a
stone chip), the defogger/defroster is not turned on . This prevents
the crack from spreading.
• We recommend that you locate an Audi dealership immediately
to have the windshield replaced.
•
Rear window defogger QW
Fi g. 13 9 Sw itch for
r ea r wi ndow defo gger
Press t he (ffiJ switch to turn the rear w indow defogger on
and
off => fig. 139.
The rear window defogger works only when the engine is running .
The indicator light in the button illuminates when the rear window
defogger is turned on . T
he rear window defogger will switch off automatically after a short
t ime . The time the rear window defogger remains on wi ll vary
depending on the outside temperature.
At very low outside temperatures, the rear window defogger can be switched on continuously by push ing the
QiP button for more than 2
seconds. This remains stored until the ignition is switched off .
A rear window defogger that was switched on also remains stored
for 15 minutes after the ignition is switched off . If the engine is
r estarted within these 15 minutes, t he rear w indow defogger is also
activated, depending on outside temperature. With a vehic le that is
parked for a short time, the rear window defogger does not need to
be manua lly activated aga in.
W For the sake of the environment
Turn the defogger off when the rear w indow is clea r. When you save
electricity, you save fuel. •

Warm and cold -
----------------
the outside air drops, fresh air is supplied to the vehicle interior
again .
In the event that the windows fog up during automatic air recircula­
tion, you must press
the® button immediately.
Under certa in operat ing cond it ions, automatic a ir rec ircu lation is
switched off automatically . With outside temperatures below about
-8 °C and in the ECON mode, automatic air rec ircula tion is limited to
15 seconds. •
Synchronization
One climate control setting for all seats.
With synchronization active, the driver's or the passenger's settings
are adopted for the other seats . Al l the other set tings that were
made are transferred to the other seats. This includes all the c limate
control settings right down to the heated seats .
If
a d ifferent setting is selected at a "synchron ized seat", synchroni ­
zation is cancelled.
•
Center air vent
The temperature of the air leaving the center vents can be
changed to differ from the temperature setting.
Controls and equip­ ment
Fig. 14 2 MMI di spla y:
Ce nter a ir ve nt
The air flow coming from the center vents can be adjusted to be
colder or warmer t han the selected set temperatu re.
In this way you have the opportunity to have the a ir flow from the
center vents a litt le warmer or coo ler, depending on the time of year .
A litt le cooler in the summer and a little warmer in the winter. •
Applies to vehic les : with rear air condition in g
Rear seat operation
The rear climate con trols can be o perated fr om the
driver's area.
With active rear seat operation, the driver or the passenger can
operate the rear climate control system from
his/her contro ls. •
Ap plies to vehicles : w ith so lar roof
Solar operation
Depending on the solar irradiation in the vehicle, the fan
will run using solar power to keep fresh air circulating
inside the vehicle, even af ter you switch off the ignition.
- Switch the solar operation to on .
After you switch off the ignition, the fan is operated using solar
power from the solar roof. Make sure outlets
G) and © are open for
maximum
ventilation => page 722, fig. 137.
The vent ilation works on ly if t he sunroof is closed or t ilted up.
If you turn off the engine whi le the air rec irculation is on, the air
conditioning automatically switches to fresh air mode.
Solar operation is not activated at low outside temperatures .•

___________________________________________________ O_ n_ t_h _e_ r_o _a_ d _ ___.111111
fl::. WARN ING (c o ntinue d)
injurie s to the hands, arm s and head if the driv er's a irbag
deplo ys.•
Easy entry feature
The easy entry feature makes it easier to enter and exit the
vehicle by automatically adjusting the steering wheel.
Press the button @ ::::> page 128, fig . 143 to turn the easy
entry feature on or off.
When the easy entry feature is tu rned on (bu tton depressed), the
steering wheel moves up to the parked position when the ignition is
turned off. After you en ter the vehicle, the steer ing wheel moves to
the stored position as soon as you turn on the ignition. •
Ignition lock and ignition switch
Ignition key positions
The engine can be started or turned off with the ignition
key.
Contro ls a nd eq uip­
ment
F ig . 14 4 Ignit ion
sw itch po sitio ns
P os it ion @
The ignition key can be inserted into the ignition switch in this posi ­
tion. This automatically unlocks the steering column lock. When the ignition key is removed, the stee ring co lumn lock is automatically
locked
=> fl::. .
Ignition on G)
Turn the ignition key to this position and re lease it.
Starting the engin e @
The engine starts with the key in this position . Major electrical loads
are tempo rar ily turned off.
Ign ition off G)
Turn the ignition key to this position and re lease it .
& WARNING
• Never remo ve the key from th e ign ition lock while the ve h icle i s
mo ving . The stee ring wheel will lo ck, c au sing loss of control.
• If you have to leave your veh icle, even for ju st a minute , al ways
remove the ignition key and take it with you. Thi s is esp eciall y
important if you are going to lea ve ch ildren unatten ded in the
vehi cle . The ch ildren co uld start the eng ine or u se other vehicle
c ontrol s. Un super vis ed u se of veh icle control s (for e xam ple , po wer
windows ) can cause seriou s personal inj uries .
0 Note
• I f the~ symbo l in the display blinks, there is a malfunction in the
e lectron ic steering column lock. Fo llow the instructions in
=> page 33 , "Steering malfunction i".
• If the .Pc symbol in the display b links, there is a malfunct ion in
the electronic ignition lock. Follow the instructions
in => page 33,
"Ignition lock malfunct ion .Pe" . ..
Vehicle care I I irechnical data

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[ i J Tips
• If you release the ignition key in positions G) ,@ or G) , the key
automatically returns to pos ition @.
• If you open the driver 's door when the ignition is switched on , a
buzzer sounds and the message
Ignition is on appears in the instru ­
ment cluster display. Please switch the ignition off .•
Ignition key safety lock
The igni tio n key can only be re move d when the selector
lever is in the
"P" (P ark) posi tion.
After turning off the ignition , the igni tion key can only be removed
from the ignition lock when the selec tor lever is in the
"P" (Park)
position . Af ter you have removed the key , the selector lever is locked
and cannot be moved .•
Starting and stopping the engine
Starting the engine
The engine ca n only be st arted with y our or iginal A udi
key.
Fig . 14 5 Ignit ion key
po sitions
-St ep o n the brake.
- Move t he selector lever into P or
N => &, .
-Turn the ign ition key to position 0 => fig . 14 5 -do not
depress the gas pedal when start ing t he engine .
A cold engine may sound loud after it has be en started. This is due
to the hydrau lic valves building up oil pressure. This is normal and
is not a n eed fo r concern .
I f the engine does not start immediately, stop trying after 10
seconds and then try to restart the engine about 30 seconds later .
& WARNING
Never start or let the engine run in a confined or en clo sed are a.
Exhaust fumes from the engine contain carbon monoxide, a color ­
less and odorle ss gas . Carbon mono xide can be fatal if inhaled.
• Never leave the engine idling unattended. An unattended
vehicle with a running engine po ses a dange r of person al injury or
theft.
0 Note
• Avo id high e ngine speeds, fast accelerati on or heavy eng ine
loads while the engine is still cold. This could damage the engine.
• The eng ine ca nnot be s tarted by push ing or towi ng the ve hicle.
To avoid unnecessary engine wear and to reduce exhaust emis ­
sions, do not let your vehic le stand and warm up. Be ready to drive
off im mediately afte r starting your vehicle . Maintain modera te
speed until the engine is completely warm . Remember , the engine
performs best at operating temperature. •

On the road -
-----------------'
Stopping the engine
-Turn the ignition key to position®~ page 130, fig. 145.
& WARNING
• Never turn off the engine until the vehicle has come to a
complete stop.
• The brake booster and servotronic only work when the engine
is running. With the ignition turned off, you have to apply more
force when steering or braking. Since you cannot steer and stop normally, this can lead to accidents and serious injuries .
• The radiator fan can continue to run for up to 10 minutes even
after you have turned off the engine and removed the ignition key.
The radiator fan can also turn on again if the engine coolant heats
up because of intense sunlight or heat build-up in the engine
compartment.
0 Note
Do not stop the engine immediately after hard or extended driving.
Keep the engine running for approximately two minutes to prevent
excessive heat build-up.•
Contro ls a nd eq uip­
ment
Starting and stopping the engine
using the Advanced Key
A pp lies to veh ic les: with Advanced Key
Starting the engine using the [ START] button
Using this button, you can switch on the ignition and start
the engine.
0
0
Fig . 146 Advanced
Key: START button
The [ START] button has a two position feature. ~ fig. 146.
Switching on the ignition
-Press the [START] button to the first position. Only the
ig nition switches on .
Starting the engine
-Depress the foot brake.
- Move the selector lever into the P or N position
~ &.
- Press the [ START] button to the second position. The
engine starts.
Vehicle care I I irechnical data

-
On the roa d
----------------
When starting a cold engine, the engine may be a bi t noisy for a
shor t w hile. This is because the hydraulic valves are working to
bring up the oil pressure . This is norma l and no cause for concern .
If the engine does not start immediately, stop cranking the engine
after 10 seconds . Wa it 30 seconds, t hen try to restart the eng ine.
& WARNING
Ne ver sta rt the engine in an en clo sed area su ch a s in your garage
with the garage door clo sed . The exhau st fumes are poi sonous!
0 Note
• Avoid high engine speeds, full gas or heavy engine loads if the
eng ine has not warmed up to its operating temperature . You cou ld
damage the engine.
• Do not try to start the engine by pu lling or pushing .
~ For the sake of the environment
Do not let your veh ic le stand and warm up . Be ready to drive off
right away. T his way, you prevent unnecessary exhaust emissions.
[ i ] Tip s
If you open th e driver 's door when the ignition is switched on , a
buzzer sounds and the message
Ignition i s on appears in the instru ­
ment cluster display. P lease switch the ign ition off .•
A pp lies to vehicles: w it h Ad vanced Key
Stopping the engine using the [S TO P] button
0
0
- Bring t he vehicle to a complete stop.
Fi g. 14 7 Advan ced
Ke y: S TOP button
-Mov e th e s elect or in to the P or N posi tion .
- Press the [STO P]
button => fig. 14 7.
Press ing the [ STOP) butto n once sw itches o ff the engi ne and the
ignition . If you press the [STOP] button again for approximately 2
seconds, the steeri ng wi ll be locked, provided that the selector lever
is in the P position
=> & .
Em ergen cy OFF fun ction
If necessary, the engine can be switched off with the selector lever
in the R, Dor S pos it io ns. To do so, step on the foot brake and press
and ho ld the [S T O P] button (vehic le speed must be be low 6 mph/
10 km/h).
& WARNING
• Never stop the engine until the vehi cle h as c ome to a complete
stop .
• The br ake boo ster and the servotroni c onl y w ork when the
engine is running . If you turn off the engine , more force will be