AUDI S8 2009 Service Manual

current tank of fuel and with the same driving style. The display
changes in increments of 6 miles (10 km).
The cruising range is calculated based on the fuel consumption for
the last 18 miles (30 kml. If you drive conservatively, the cruising
range will increase.
Average fuel mileage
The average fuel economy in MPG (1/100 km) since you last c leared
the memory appears in this display . You can use this display to
adjust your driving technique to achieve a desired mileage.
Current fuel mileage
The instantaneous fuel consumption in miles per gallon (1/100 km)
is shown in this display. You can use this display to adjust your
driving technique to achieve a desired mileage.
Fuel consumption is recalculated at intervals of 33 yards (30
metres). When the vehic le is sta tionary, the most recent fuel
consumption is displayed.
Average speed
The average speed in mph (km/h) since the last time the display was
reset appears in the display.
Elapsed time
The length of time that you have been driving since you last reset
the memory appears in this display.
[ i ] Tips
• Fuel consumptions (average and current) , range and speed are
displayed in metric units on Canad ian models .
• All stored values wil l be lost if the vehicle battery is
disconnected .•
Con tro ls and eq uip­
ment
Driver information display
Memori es
The trip computer is equipped with two fully automatic
memones.
Fig . 22 Trip computer
display: memory level 1
You can switch between the trip computer 1 and 2 by pressing the
Reset button
@ ~ page 40, fig. 23.
You can tell which memory level is currently active by the number in
the display ~ fig . 22. The data from the single -trip memory
(memory level 1) is being displayed if a
1 appears . If a 2 is shown ,
then the data from the total -trip memory is being disp layed
(memory level 2).
Single-trip memory (Trip computer 1 )
The single-trip memory stores the trip information from the time the
ignition is turned on until it is turned off. If the trip is continued
within 2 hours from the time the ignition was turned off, the new
data will be included in the calculation of the current trip informa­
tion. If the trip is interrupted for
more than 2 hours the memory is
reset automatically.
Total-trip memory (Trip computer 2)
Unlike the single -trip memory, the total -trip memory is not reset
automatically . This permits you to evaluate your driving data for the
entire period between manual resets .•
Vehicle care I I irechnical data

Driver informati on displ ay
Operation
The trip computer is controlled by two switches on the
windshield wiper lever.
N co
"' w ;g
F ig . 23 W inds hield
w ip er l ever : c on trol s
fo r the t rip com puter
Push the function selecto r switch up or down @
=> fig . 23. This will cause t he five distinct trip c ompu ter
functions to be displayed o ne after another.
The trip computer only operates when the ignition is on. When you
turn on the ignition , the function that was in use when you last
turned the ignition off will be displayed .
In addition to the trip computer information (memory level 1 or 2),
navigation information and Adaptive Cruise Control * information
can be displayed. To switch the display between the different
systems, tap the Reset button
© briefly.
S ett ing values t o ze ro
To delete
o ne current value from the trip computer , se lect the
desired funct ion and press the Reset button
@ for at least one
second. The following values can be set to zero
indi vidu ally using
t he Reset button:
• elapsed time
• average fuel mi leage
• average speed In addition
,
all the values in the single-trip or the total -trip memory
can be de leted simultaneous ly .
Ii ] Tips
All stored values will be lost if the vehicle bat tery is disconnected .•
MMI settings
Basic settings for the trip computer can be made in the
MM/.
F ig . 2 4 MMI display :
Trip co m put er
Setting values to zer o
- Pressthe (CAR )function button.
- Select
Syst em s in the CAR me nu.
- Select
Instrum ent clust er.
- Select Trip computer 1 or Trip computer 2.
- Select Reset to delete all the values in the memory
~ fig. 24 .
Displaying and hiding driver information
- Pressthe (CAR )fu nct io n butto n.

-Select System s in the CAR menu .
- Selec t
Instrument cluster .
-Select Trip computer 1 or Trip computer 2 .
-Select, for examp le, Fuel range On to turn on the display
or
Off to turn the disp lay off.
All values in the single -trip or the total -trip memory can be reset to
zero simultaneously in MMI. In addition you can determine what
driving information from the trip computer should be shown in the
instrument cluster display. If one of the pieces of driver information
is turned off, that driver information will not be shown in the display .
The information will continue to be calcu lated by the trip computer
and can be turned back
on at any time. •
Tire pressure monitoring system
Applies t o vehi cle s: with n re pre ss ure moni toring sys te m
General notes I)
Each tire, including the spare (if provided}, should be checked
month ly when cold and inflated to the inflation pressure recom­
mended by the vehicle manufacturer on the vehicle placard or tire
inflation pressure label. (If your vehicle has tires of a different size
than the size indicated on the vehicle placard or tire inflation pres ­
sure label, you should determine the proper tire inflation pressure
for those tires.}
As an added safety feature, your vehicle has been equipped with a
tire pressure monitoring system (TPMSl that illuminates a low tire pressure tellta le when one or more of your tires is significantly
under-inflated . Accordingly, when the low tire pressure te lltale i llu ­
minates, you should stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving on a significantly
under -inflated tire causes the tire to overheat and can lead to tire
Controls and equip ­
ment
Dr ive r informat ion di spl ay
failure . Under -inflation also reduces fuel efficiency and tire tread
life, and may affect the vehicle's handling and s topping ability.
Please note that the TPMS is not a substitute for proper tire mainte ­
nance, and it is the driver 's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the leve l to trigger
illumination of the TPMS low tire pressure te lltale.
Your vehic le has a lso been equipped with a TPMS malfunction indi­
cator to indicate when the system is not operating proper ly. The
TPMS ma lfunction indicator is combined w ith the low ti re p ressure
tel ltale . When the system detects a malfunction , the telltale wil l
flash for approximately one minute and then remain continuously
il luminated . This sequence will cont inue upon subsequent vehicle
start -ups as long as the malfunction exists.
When the ma lfunction indicator is illuminated, the system may not
be able to detect or signal low tire pressure as intended . TPMS
mal functions may occur for a variety of reasons, including the
insta llation of replacement or alternate tires or wheels on the
vehic le that prevent the TPMS from funct ioning properly. A lways
check the TPMS malfunction tellta le after replacing one or more
tires or whee ls on your vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to continue to function
properly. •
Applies t o vehic les : w ith Tire press ure mon itoring sy stem
Introduction
The tire pressure monitoring system moni tors air pressure
in all four roa d wheels and the spare tire* while the
vehicle is moving.
As soon as the tire pressure monitoring system senses a significant loss of air pressure in one o r severa l tires, text messages and yellow
symbo ls appear in the instrument cluster display to alert the driver.
The L warni ng light in the instrument cluster comes on when the
tire is significantly underinflated
=> page 20. _,,
I • •

Driver inf ormati on displ ay
The warning light n also illuminates in the case of a system
mal fu n ction.
The system continuously receives radio signals from sensors located inside each tire .
Be aware that tire pressure is also dependent on the temperature of
the tire. For every 18 °F (10 °C) increase in tire temperature, tire pres­
sure increases by about
1 .5 psi (0.1 bar). The tire warms up while the
vehic le is moving and tire pressure rises. So you should adjust tire
pressure only when the tires are
cold, when the temperature of the
tires is roughly the same as the ambient air temperature .
In order to keep the tire pressure monitoring system properly cali ­
brated, tire pressure on al l four tires and on the spare tire * should
be checked at regular intervals, adjusted if necessary and sav ed in
the proper setting (recommended pressure) =>
page 44.
The tire pressure is shown on the tire pressure label. On USA vehi­
cles, the tire pressure label is located on the driver's side B -pi llar. On
Canada vehicles, the tire pressure labe l is located either on the
driver's side B -pil lar or inside the fuel filler flap . The tire pressu re
label lists the recommended cold t ire inflat ion pressures for the
vehic le at its maximum capacity weight and the tires that were on
your vehicle at the time it was manufactured . For recommended tire
pressures for normal load conditions, please see chapter
=>
page 330 .
The current temperatures and pressure of your tires can be viewed
i n the MMI =>
page 44.
& WARNING
• When the t ire pre ssure moni toring sy st em warning light i s lit ,
one or more of your tir es is s ignifi cantly under -infl ate d . Y ou s hould
s to p and che ck your tir es as soon as poss ible, and infl ate th em to
th e p rop er p ress ure as i ndicated on the vehicle's tire press ure
lab el
=> page 3 30 . Driving on a s ig n ific antly und er-inflated tir e
ca uses the t ire to overheat an d ca n le a d t o tir e fai lur e. U nde r- infl a-
& W ARN IN G (c ontinued )
tion a lso is likel y to imp air t he veh icle 's handling and sto pping
ability .
• Do not adju st t ire press ure when t ire temper atu re i s excessiv e.
T hi s c ould le ad to seriou s tire dam age and even cause the ti re to
bur st, w ith the additional d ange r of an accident .
Driving with under -inflated tires reduces fuel efficiency and tire
tread life.
[ i ] Tips
• Each tire, includin g the sp are*, should be checked monthly when
cold and set to the recommended inflation pressure as specified on
the tire pressure label=>
page 330.
• T he tire pressure monitoring system he lps the d river to keep an
eye on tire pressures . But the dr iver st ill has the responsibility for
maintaining the correct tire pressure .
• Tire pressure must only be adjusted when the temperature of the
tires is about the same as ambient air temperature.
• When tires are replaced, the sensors and valves shou ld not be
detached or exchanged . Only the valve core needs to be replaced
and, if necessary, the va lve and the wheel electronics replaced .
• If you should put different whee ls and tires on your vehicle (e.g .
winter wheels and tires), you must be certain that the wheels and
tires are compatible with the tire pressure monitoring system. Otherwise the system will register a ma lfunction and a fault
message will be displayed. For more information , contact your
authorized Audi dea ler.
• Adjust the tire pressure and store the pressure in the tire pres ­
sure mon itor ing system to the load you are carrying=>
page 330.
• For Declaration of Compliance to United States FCC and Industry
Canada regulations =>
page 385. •

Applies to vehi cle s: w ith nr e pressu re monitoring syst em
Significant loss of air pressure '
The yellow symbol appears in the event of a significant
loss of air pressure.
Fig. 25 Display: yellow
sy mbol with message
Fig . 26 Display: yellow
sy mbol without
mess age
If the ' ' warning light in the instrument cluster=:> page 20
illuminates and then the symbol appears in the display
=:> fig. 25 or=:> fig. 26, this means the tire pressure is too low
in one or several tires (including spare tire* with se nsor).
- Stop driving as soon as possible without endangering
yourself or other drivers on the road.
- Inspect the t ire or tires .
Contro ls and eq uip­
ment
Driver information display
-Chang e the tire i f necessary =:> page 353.
The warning light in the instrument cluster comes on when the
tire is significantly underinflated.
In addition, the tire symbol appears in the display together with
the message
Please check tire pressure=> fig. 25.
After a few seconds, the message disappears again=> fig. 26 . If you
would like to show the message again, press the [ CH ECK] button.
[ i ] Tips
• In the case of an intentional loss of air pressure, for example,
when re -adjusting tire pressure, this has to be stored again after ­
wards =>
page 44.
• Current information about tire pressures and temperatures can
be scanned in MMI
~ page 44.
• Tire pressure must only be adjusted when the temperature of the
tires is about the same as ambient air temperature.
• The yellow symbol disappears, when the tire pressure is
corrected and the new pressure is stored in the system~
page 44.
• After changing a wheel you have to adjust the t ire pressures on
al l whee ls. In addition, you must then initialize the new tire pres­
sures in the tire pressure monitoring system~
page 45.
• If your vehicle is equipped with a spare tire* with a wheel sensor,
the tire will be monitored and the display symbols~ fig. 25 or
~ fig. 26 will appear if the pressure is too low. •
Vehicle care I I irechnical data

Driver informati on displ ay
Ap plies to vehicles: w ith n,e pre ssu re monitoring system
Displaying tire pressures and temperatures
The current status of the tires can be displayed in MM/.
~ J '-, ' l
I
'
Tire pressure monitoring
• D isp lay tire pressures ....
I

12 :QQ AM , ·' ',!(,I:
Turn on the ignition.
Press the
!CAR) function button.
Select
Syst ems in the CAR menu.
Select
Tire pre ssure monitoring .
Fig . 27 MMI d isp lay:
T ire pressure moni­
to ring system
Fig . 28 MMI dis play:
D is play in g th e tire
p ressu re
Select Di splay tir e pr ess ures. The tire pressures and
temperatures are dis played
=> fig . 28.
Current tire pressures are shown in green and yellow numbers. The
meaning of the co lors is as fo llows:
• Green: If current tire pressure and the specified pressure are
approximately the same, the tire pressure is shown in green .
• Yellow : If current tire pressure is too low with respect to specified
pressure, the tire pressure is shown in yellow.
[ i ] Tips
• During the learning period, tire pressure and tire temperature
are not displayed . Horizontal lines --,-- are displayed for pressure
and temperature.
• The tire pressure is shown on the label located either on the
driver's side B-pil lar (visible when the door is open) or inside the fuel
filler flap.
• The tire pressure monitoring system helps the driver to keep an
eye on tire pressures. But the driver still has the responsibility for
maintaining the correct tire pressure. •
Applies to vehicles: with Tire pressure mon itor ing system
Storing tire pressures
Correct storage of specified pressure is the basic require­
men t for reliable tire pressure monitoring.
In order for the tire pressure mo nito ring system to ope rate
appropr iately, yo u have to re -save the specified pressures
whenever yo u adjust tire pressure, for example when the
load condition of your vehicle changes. Proceed as follows:
Corr ecting t ir e pres sure
- Check the pressure in the tires (including the spare tir e*). ~

-Adjust air pressure as needed in acco rdance with the
informat io n on the label located either on the driver's
side B -pillar (visible w hen the door is open), inside the
fuel filler flap and addi tionally in t he manua l.
Saving tir e pres sur es
- Tur n on the ignition.
- Press the
I CAR I funct ion button.
- Select
Systems in the CAR menu .
Selec t
Tire p ressure monitoring.
-Select Store curr. tire pres sures :::} page 44, fig. 27 .
All pressure warning indicators in the display will be canceled .
Following each intentional change in specified pressures, tire pres ­
sures must be resaved .
After the pressures are saved, the tire pressure monitoring system measures the current tire pressures and saves them as the new
specified pressures.
[ i ] Tip s
• T he t ire pressure is shown on the tire pressure label. On USA
vehic les, the tire pressure label is located on the driver's side 8 -
pillar. On Canada vehicles , the tire pressure labe l is located e ither on
the driver's side 8 -pillar or inside the fuel filler flap. The tire pressure
label lists the recommended cold tire inflation pressures for the
vehicle at its maximum capacity weight and the tires that were on
your vehicle at the time it was manufactured . For recommended tire
pressures for normal load conditions, please see chapter
=> page 330 .
• The tire pressure mon itoring system he lps the driver to keep an
eye on tire pressures. But the driver still has the responsibility for
maintaining the correct tire pressure.
Controls and equip ­
ment
Dr ive r informat ion di spl ay
• I f your vehic le is equipped with a standard spare tire *, it must be
inflated to the maximum pressure specified for the veh icle. •
Applie s to veh ic le s : with T ire pressur e mo nitoring sys tem
Changing a wheel
When you change a wheel, the new tire must be initial ­
ized.
- Turn on the ignition .
Press the
I CAR] function button.
Select
Systems in the CAR menu.
- Selec t
Tire pre ssure monitoring .
Select Initialize wh eel s:::} page 44, fig. 27.
Programming is necessary:
• After the tires have been rotated on the vehicle (inc luding use of
the spare tire*),
• I f tires with new wheel sensors are used.
A ll pressure warning and system ma lfunction indicators in the
display will be canceled.
I f a wheel change has been made, it is necessary to complete the
Initi aliz e w heel s function.
The tire pressure monitoring system is not available during the programming process and no pressure and temperature values are
displayed on the MMI display.
After you have selected the function, the new whee ls are
programmed and the actual pressures are stored. This learning
phase can take up to 20 minutes driving time. •
I • •

Driver informati on displ ay
Ap plies to vehicles : w ith n,e pre ss ure monito ring syst em
Malfunctions
A malfunction can have various causes.
Fi g. 2 9 Dis p lay :
S ystem m alfun ction
If the l · warning light in the instrument cluster flashes for approxi ­
mately one minute and then remain continuously il luminated and
additional ly the
-r J ~ fig . 29 symbo l appears in the display, the
tire pressure monitoring system is not ava ilable . Th is can have
various causes.
• If the message appears at the end of the learning process, the
system cannot recognize the wheels installed on the vehicle. This
can be because one or more wheels without a wheel sensor were
installed.
• A wheel sensor or other componen t may have failed.
• The system has detected more than 5 whe els with wheel sensors
in the vehicle, for example when carrying snow tires.
• A tire was changed but the
Initiali ze wheels function was not
activated
=:> page 45.
• Audi replacemen t parts were not used .
• If snow chains are being used, system function can be compro­
mised due to the shielding properties of the chains.
• The tire pressure monitoring system may not be available
because of a radio malfunction . • T
ransmitters with the same frequency, such as radio head­
phones in the vehicle or radio equipment, can cause a temporary
disruption of the system through excessive electromagnetic fields .
• Eliminate the interference i f possible/if you can and then re-start
the
I n itia lize w heel s function . If the warning light comes on again,
you shou ld contact your authorized Audi dealer immediately to have
the problem corrected .
• Do not use commercial ly availab le tire sealants . Otherwise, the
electrical components of the tire pressure monitoring system will
n o l onger work properly and the sensor for the tire p ressure moni ­
toring system wi ll have to be replaced by a qua lified workshop .•

Opening and closing
Keys
Key set
@ Master key w ith remo te con trol
Fig . 30 Key s et
You can centrally lock and unlock your vehicle and start the engine
with the mas ter key with remote control.
@ Valet k ey
The va le t key fits only the driver's door and the ignition lock . If you
have to leave the key with somebody else, you are well -advised to
t urn over the valet key only .
Be aware that the rear lid can be opened from inside the veh ic le with
the remote rea r lid release located in the driver's door . Before you
turn over the valet key you shou ld therefore lock the rear lid
mechanica lly with the master key .
T ur n th e mas ter key
clo ckwi se to the hori zontal positi on and pull it
out. This has two effects:
• the
remote rear lid release i s deactivated ,
• the lid will remain l ocked when the power locking system is actu­
ated .
Controls and equip ­
ment
Opening and clo sing
In this state the rear lid can be unlocked only with the remote
control unlock button
c:::::5 on the mast er key.
© Em erg ency k ey
The emergency key is only for temporary use if the vehicle key
should be lost or misp laced
=> & .
Key replacement
If you lose a key , contact your authorized Audi dea ler immediately
t o have the
Jost key disabled . Be sure to bring all your keys with you.
& WARNING
• Do not leave your vehicle unattended with the key in the igni ­
tion lock . Entry b y unauth orized persons could endanger you or
re sult in theft or damage the vehi cle . Alway s lock all door s and
take the ke y.
• Do not le ave children unattended
in the vehicle , especially with
acce ss to veh icle key s. Unguarded a ccess to the key s provide s
c hildren the opportunity to start the engine and /or a ctivate vehicle
s y stem s such a s the power w indo ws e tc. Un supervi sed operat ion
of any vehi cle system by children c an re sult in serious injury .
[ i ] Tips
• I f you open the driver 's door wi th the key left in the ignit ion lock,
a chime w ill sound . T his is your reminder to remove the key and lock
the door .
• For security reasons, replacement keys are only available from
Audi deale rs. •
I • •

Opening and closing
Master key with remote control
The remote control allo ws you to l ock or unlo ck the
vehicle electronically .
Fig . 3 1 F old -up ma ste r
ke y wit h re mote
c ontro l
-To fold the key out and back i n place, press the release
button
=:> fig. 3 1.
The transmitter and battery are located in the head of the remote
control. The receiver is located inside the vehicle . The maximum
ef fective ra nge depends on several t hings. Remember, if the battery
is weak, the effective range decreases .
If you need to replace the remote contro l, or if you need to have it
repaired, you must see your authorized Audi dealer. On ly then can
you use the key again .
Personalizing the master key
When the ignition is turned off or when the vehicle is locked, various
convenience settings are stored automatically and assigned to the
key that wa s used . The settings assigned to the key are automati ­
cally reca lled with you unloc k the vehicle or when you open a door
or when you switch on the ignition .
• Climate contro l
• Central locking
• Windows and rear window sun blind •
Background lighting *
• Seat me mory
• Adaptive Cruise Contro l*
• Audi lane and side assist *
• Advanced Parking Syste m*
T he
Remo te co ntrol ke y function must be activated in MMI
=> page 95, so that the settings for the driver's seat (including the
sett ings for the head restraint, steering column , safety be lt height
and exterior mirrors) are saved on the master key through the seat
memory when the vehicle is locked, and a re set automatically when
the vehic le is unlocked .
[ i ] Tip s
• I f the ignition is switched on, the remote control system is deac ­
tivated .
• T he remote control system can be affected by other systems
opera ting in the same frequency range close to the vehicle, such as
mobile telephones, television broadcasting stations, etc.
• For Declaration of Compliance to United States FCC and Indus try
Canada regulations =>
page 385. •
Battery replacement , master key
. w ',!
Fig . 32 C heck lig ht in
the m aster key ..