ECU AUDI S8 2009 User Guide

-L~A~d~a~ p~ t~iv~ e~A~ ir~ S~u~ s ~p~ e~n~ s~io~n ~-------------------------------------------
Adaptive Air Suspension
Adaptive Air Suspension and
Damping
Description
Adaptive Air Suspension and damping can be regulated and they adapt automatically t o a request from the driver
and the driving situation at the time.
Adaptive Air Suspension is an electronica lly controlled springing
and damping system. This chassis system makes it easier on the
driver by adapting to the particular situation through imperceptible
control processes.
The
Ad aptiv e Ai r Suspen sion component regulates ground clear ­
ance depending on vehic le speed, load condition and driver input.
Accelerating to a speed above a predetermined limit wil l make the
vehic le lower itself. On the other hand, driving more slowly results
in the vehicle raising aga in at specific speeds.
The
damping component provides individual control of the
damping forces . For example, with damping c haracteristics set to
provide greater comfort, damping is set somewhat harder for a brief period only as required, for example, when going around a curve or
over rough road surfaces as well as when braking.
Settings
Adaptive Air Suspension provides the driver w ith the opportunity to
set the chassis characteristics also to their individual preference .
With the driving modes
standard, automatic and dynamic the driver
has three chassis settings available, ranging from comfort to sporty.
In addition,
lift provides a fourth mode which can be selecting for
driving over poor stretches of road=>
page 189, "Chassis Controls".
The modes are set in MMI =>
page 191.
On vehicles equipped with the s port su spen sio n Adaptive Air
Suspension -Sport*, there is generally more emphasis on a sporty
chassis setting. Settings range from comfortable to firm
=>
page 190, "Sport Chassis Contro ls".
0 Note
• Whenever you park your vehicle, always make sure there is
adequate c learance
above and below the vehic le . The height of the
parked vehicle can change as the result of temperature fluctuations,
changes in load conditi on and changes in the driving m ode (gro und
clearance).
• Mount the tie -down chains/cables over the running surface
(circumference) of the tires . Never secure the vehicle by the axle, the
suspension stru ts or the front or rear towline eye. For technical
reasons, the pressure in the suspension struts may change during
the transport and this wi ll adversely affect vehicle handling.
• To prevent damage to the vehicle underbody, remember that
you r veh ic le is not an off -road vehicle, even in the lift mode. The
ground c learance is insufficient for this type of operation.
• If you are going to tow a trai ler, you must activa te the trai ler oper ­
ation mode=>
page 792.
[ i ] T ip s
Before you can raise your vehic le using the vehicle jack (for
example, when changing a flat tire) you must activate the jacking
mode=>
page 191 . •

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- Press the appropriate programmed button G),@ or @
to activate the desired remote control function~
& in
"General information" on
page 194. •
Applies t o ve hicl es: wit h Hom elin k® universal re mote co nt ro l
Reprogramming a single button
A Homelink ® button can be reprogrammed individually
without affecting the other button a/locations.
Programming the overhead keypad
- Press the appropriate Homelink® button unt il the indi ­
cator light begins flashing slowly.
Programming the bumper mounted transmitter
1. Hold the original remote control at a distance between 0-
5 in. (0-13 cm) from the bumper below the appropriate
headlight for your vehicle (use the sho rtest distance
possible) .
2. Aim the remote control just below the
driver side head­
light.
3. Press and hold the activation button on the remote control.
4. The emergency flashers will flash
three times (after
about
15-60 seconds) when the programm ing is
successful. Now release the button on the remote
control.
- If the device ut ilizes a rolling code, please follow phase 3
of ~
page 195, "Programming the Homelink® trans ­
mitter" for rolling code programming.
Controls and equip ­
ment This procedure
will cause
the existing programming on the
Homelink ® button to be erased! •
App lies t o ve hicles : with Homeli nk® universa l re m ote contro l
Erasing the programming of the Homelink ®
transmitter
When you erase the programming , the programming on
all three of the transmitter channels with be lost!
- Perform steps 1 to 4 as descr ibed on~ page 195, "Phase
1: programm ing the overhead keypad ".
When completed , the Homelin k® system will be in the program­
ming mode and is then ready to learn the cod es for remote
controlled devices.
(I) Tips
• Programmed buttons cannot be erased individually.
• For security reasons you ar e advis ed to erase the programming
of the Homelink ® system befo re you sell your vehicle. •
I • •

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Important things to do before driving
Safety is everybody's job! Vehicle and occupant safety
always depends on the informed and careful driver.
For your safety and the safety of your passengers, before
driving always:
-Make sure that all lights and signals are operat ing
correctly.
- Make sure that the tire pressure is correct.
- Make sure that all windows are clean and afford good
visibility to the outside.
- Secure all luggage and other items carefully~
page 109.
-Make sure that noth ing can interfere w ith the pedals.
- Adjust front seat, head restraint and mirrors correctly for your height .
- Instruct passengers to adjust the head restraints
according to their height.
- Make sure to use the right ch ild restraint correctly to
protect children ~
page 245, "Child Safety ".
- Sit properly in your seat and make sure that your passen ­
gers do the same~
page 86, "General recommenda ­
tions".
- Fasten your safety belt and wear it p roperly. Also instruct
your passengers to fasten the ir safety belts properly
~ page 217. •
Controls and equip­
ment Safety first
Vehicle operation
What impairs driving safety?
Safe driving is directly related to the condition of the
vehicle, the driver as well as the driver's ability to concen­
trate on the road without being distracted.
The driver is responsible for the safety of the vehicle and all
of its occupants. If your ability to drive is impaired, safety
risks for everybody in the vehicle increase and you also
become a hazard to everyone else on the road ~& .There ­
fore:
Do not let yourself be distracted by passengers or by
using a cellular telephone .
NEVER drive when your driving ability is impaired (by
medications, alcohol, drugs, etc.).
- Observe all traffic laws, rules of the road and speed limits
and plain common sense .
- ALWAYS adjust your speed to road, traffic and weather
conditions.
- Take frequent breaks on long trips. Do not drive for more
than two hours at a stretch.
- Do NOT drive when you are tired, under pressure or when
you are stressed .
& WARNING
Impaired driving safety increases the risk of serious personal
injury and death whenever a vehicle is being used. •
Vehicle care Do-it-yourself service Technical data

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& WARNING (continued)
• Passengers must always sit in an upright position and never
lean against or place any part of their body too close to the area
where the airbags are located.
• Passengers who are unbelted, out of position or too close to the
airbag can be seriously injured by an airbag as it unfolds with
great force in the blink of an eye .
• Always make sure that there are at least 10 inches (25 cm)
between the front passenger's breastbone and the instrument
panel.
• Always make sure that there are at least 4 inches (10 cm)
between the front passenger's knees and the lower part of the
instrument panel .
• Each passenger must always sit on a seat of their own and
properly fasten and wear the safety belt belonging to that seat .
• Before driving, always adjust the front passenger seat and
head restraint properly.
• Always keep your feet on the floor in front of the seat. Never
rest them on the seat, instrument panel, out of the window, etc .
The airbag system and safety belt will not be able to protect you properly and can even increase the risk of injury in a crash .
• Never drive with the backrest reclined or tilted far back! The
farther the backrests are tilted back, the greater the risk of injury
due to incorrect positioning of the safety belt and improper
seating position.
• Children must always ride in child seats :::::,
page 245. Special
precautions apply when installing a child seat on the front
passenger seat
=:> page 220. •
Proper seating positions for passengers in
rear seats
Rear seat passengers must sit upright with both feet on
the floor consistent with their physical size and be prop­
erly restrained whenever the vehicle is in use.
To reduce the risk of injury caused by an incorrect seating
position in the event of a sudden braking maneuver or an
accident, your passengers on the rear bench seat must
always observe the following:
- Adjust the head restraint so that the upper edge is as
even with the top of your head as possible but no lower
than eye level
=> page 205.
- Keep both feet flat in the footwell in front of the rear seat.
Fasten and wear safety belts properly =>
page 215.
Make sure that children are always properly restrained in
a child restraint that is appropriate for their size and age
=>
page 245.
& WARNING
Passengers who are improperly seated on the rear seat can be
seriously injured in a crash.
• Each passenger must always sit on a seat of their own and
properly fasten and wear the safety belt belonging to that seat.
• Safety belts only offer maximum protection when the safety
belts are properly positioned on the body and securely latched. By
not sitting upright , a rear seat passenger increases the risk of
personal injury from improperly positioned safety belts!
• Always adjust the head restraint properly so that it can give
maximum protection. •

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& WARNING
Pedals that cannot move freely can cause loss of vehicle control
and increase the risk of serious injury.
• Never place any objects in the driver's footwell . An object could
get into the pedal area and interfere with pedal function. In case
of sudden braking or an accident, you would not be able to brake
or accelerate!
• Always make sure that nothing can fall or move into the
driver's footwell. •
Floor mats on the driver side
Always use floor mats that can be securely attached to
the floor mat fasteners and do not interfere with the free
movement of the pedals.
- Make sure that the floor mats are properly secured and
cannot move and interfere with the pedals =>& .
Use only floor mats that leave the pedal area unobstructed and that
are firmly secured so that they cannot slip out of position . You can
obtain suitable floor mats from your authorized Audi Dealer.
Floor mat fasteners are installed in your Audi.
Floor mats used in your vehicle must be attached to these fasteners .
Properly securing the floor mats will prevent them from sliding into
positions that could interfere with the pedals or impair safe opera­
tion of your vehicle in other ways.
& WARNING
Pedals that cannot move freely can result in a loss of vehicle
control and increase the risk of serious personal injury.
• Always make sure that floor mats are properly secured.
Controls and equip­ ment Safety first Vehicle operation
& WARNING
(continued)
• Never place or install floor mats or other floor coverings in the
vehicle that cannot be properly secured in place to prevent them
from slipping and interfering with the pedals or the ability to
control the vehicle.
• Never place or install floor mats or other floor coverings on top
of already installed floor mats. Additional floor mats and other
coverings will reduce the size of the pedal area and interfere with
the pedals.
• Always properly reinstall and secure floor mats that have been
taken out for cleaning.
• Always make sure that objects cannot fall into the driver foot­
well while the vehicle is moving. Objects can become trapped
under the brake pedal and accelerator pedal causing a loss of
vehicle control. •
Stowing luggage
Loading the luggage compartment
All luggage and other objects must be properly stowed
and secured in the luggage compartment.
Loose items in the luggage compartment can shift
suddenly, changing vehicle handling characteristics. Loose
items can also increase the risk of serious personal injury in
a sudden vehicle maneuver or in a collision.
- Distribute the load evenly in the luggage compartment.
- Always place and properly secure heavy items in the
luggage compartment as far forward as possible.
- Secure luggage using the tie-downs provided
=>
page 100, "Luggage compartment ".
Vehicle care Do-it-yourself service Technical data

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& WARNING
Improperly stored luggage or other items can fly through the
vehicle causing serious personal injury in the event of hard braking or an accident. To help reduce the risk of serious personal injury:
• Always put objects, for example, luggage or other heavy items
in the luggage compartment.
• Always secure objects in the luggage compartment using the
tie-down hooks and suitable straps.
& WARNING
Heavy loads will influence the way your vehicle handles. To help
reduce the risk of a loss of control leading to serious personal
injury :
• Always keep in mind when transporting heavy objects, that a
change in the center of gravity can also cause changes in vehicle
handling:
-Always distribute the load as evenly as possible.
- Place heavy objects as far forward in the luggage compart-
ment as possible.
• Never exceed the Gross Axle Weight Rating or the Gross
Vehicle Weight Rating specified on the safety compliance sticker on the left door jamb. Exceeding permissible weight standards
can cause the vehicle to slide and handle differently.
• Please observe information on safe driving
~ page 200.
& WARNING
To help prevent poisonous exhaust gas from being drawn into the
vehicle, always keep the rear lid closed while driving.
• Never transport objects larger than those fitting completely
into the luggage area because the rear lid cannot be fully closed.
& WARNING (continued)
• If you absolutely must drive with the rear lid open, observe the
following notes to reduce the risk of poisoning :
- Close all windows,
- Close the power roof,
- Open all air outlets in the instrument panel,
- Switch off the air recirculation,
- Set the fresh air fan to the highest speed.
& WARNING
Always make sure that the doors, all windows , the power roof and
the rear lid are securely closed and locked to reduce the risk of
injury when the vehicle is not being used.
• After closing the rear lid, always make sure that it is properly
closed and locked .
• Never leave your vehicle unattended especially with the rear lid
left open. A child could crawl into the vehicle through the luggage
compartment and close the rear lid becoming trapped and unable
to get out . Being trapped in a vehicle can lead to serious personal
injury.
• Never let children play in or around the vehicle.
• Never let passengers ride in the luggage compartment. Vehicle
occupants must always be properly restrained in one of the
vehicle's seating positions.
[ i] Tips
Air circulation helps to reduce window fogging. Stale air escapes to
the outside through vents in the trim panel, on the left side of the
luggage compartment. Be sure to keep these slots free and open. •

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Tie-downs
The lugg age compa rtme nt is eq uippe d with f our tie ­
downs to secure luggage and othe r items .
Use the tie -downs to secure your cargo properly~ page 207,
"Loadi ng the luggage compartme nt".
I n a col lision, the laws of physics mean that even smaller items that
are l oos e in the veh ic le will become heavy missiles t hat can cause
serious injury. Items in the vehicle possess energy wh ich vary with
vehicle speed and the we ight of the item . Veh ic le spee d is the m ost
significant factor.
F or example, in a frontal co llision at a speed of 30 mph ( 48 km/h),
th e for ces act ing on a 10 -lb (4 .5 kg) o bject are about 20 tim es t he
normal weight of the item. This means that the weight of the item
w ould s udde nly be a bout 2 00 lb s. (90 kg). Yo u ca n imagi ne th e inju ­
ries that a 200 lbs. (90 k g) item flying free ly throu gh the pass enger
c o mp art ment co uld cause in a co llision lik e this.
& WARNING
Weak , damaged or improper straps used to secure items to tie ­
downs can fa il during hard braking or in a collision and cause
serious personal injury.
• Always use suitable mounting straps and properly secure
items to the tie -down s in the luggage compartment to help
prevent items from shifting or flying forward as dangerous
missiles .•
Reporting Safety Defects
Applicable to U.S.A.
If you believe that your vehicle has a defect
which could cause a crash or could cause
Controls and equip­ ment Safety first Vehicle operation
injury or death
, you should immediately inform
the National Highway Traffic Safety Adminis ­
tration (NHTSA) in addition to notifying Audi of
America , Inc.
If NHTSA receive s similar complaints , it may
open an investigation, and if it finds that a
safety defects exists in a group of vehicles , it
may order a recall and remedy campaign.
However , NHTSA cannot become involved in
individual problems between you, your dealer,
or Audi of America, Inc.
To contact NHTSA , you may call the Vehicle
Safety Hotline toll -free at:
Tel.: 1-888 -327-4236 (TTY: 1-800-424-9153)
or write to:
Admini strator
NHTSA 1200 New Jersey Avenue, SE
Washington, D.C. 20590
You can also obtain other information about
motor vehicle safety from:
http:/ /www.safercar.gov
Vehicle care Do-it-yourself service Technical data

& WARNING !continued)
• Never let any person ride with their feet on the instrument
panel or sticking out the window or on the seat.
• Never remove a safety belt while the vehicle is moving. Doing
so will increase your risk of being injured or killed.
• Never wear belts twisted.
• Never wear belts over rigid or breakable objects in or on your
clothing, such as eye glasses, pens, keys, etc. , as these may cause
injury .
• Never allow safety belts to become damaged by being caught
in door or seat hardware.
• Do not wear the shoulder part of the belt under your arm or
otherwise out of position.
• Several layers of heavy clothing may interfere with correct posi­
tioning of belts and reduce the overall effectiveness of the system.
• Always keep belt buckles free of anything that may prevent the
buckle from latching securely.
• Never use comfort clips or devices that create slack in the
shoulder belt. However, special clips may be required for the
proper use of some child restraint systems.
• Torn or frayed safety belts can tear , and damaged belt hard­
ware can break in an accident . Inspect belts regularly . If webbing,
bindings, buckles, or retractors are damaged, have belts replaced
by an authorized Audi dealer or qualified workshop .
• Safety belts that have been worn and loaded in an accident
must be replaced with the correct replacement safety belt by an
authorized Audi dealer. Replacement may be necessary even if
damage cannot be clearly seen. Anchorages that were loaded
must also be inspected.
• Never remove, modify, disassemble, or try to repair the safety
belts yourself.
Safety first
Safety belts
& WARNING !continued)
• Always keep the belts clean. Dirty belts may not work properly
and can impair the function of the inertia reel~
page 301, "Safety
belts" .•
Safety belts
Fastening safety belts
Seat first -everybody buckle up!
Fig. 227 Belt buckle
and tongue on the
driver's seat
To provide maximum protection, safety belts must always
be positioned correctly on the wearer's body.
Adjust the front seat and head restraint properly
=>
page 86, "General recommendations" .
Hold the belt by the tongue and pull it evenly across the
chest and pelvis=>& .
Inse rt the tongue into the correct buckle of your seat
until you hear it latch securely=> fig. 227.
Pull on the belt to make sure that it is securely latched in
the buckle. _.
Vehicle care I I irechnical data

-Safety belts -----=-----------------------------------------
Automatic safety belt retractors
Every safety belt is equipped with an automatic belt retractor on the
shoulder bel t. This featu re locks the bel t when the belt is pulled out
fast, during hard braking and in an accident. The belt may also lock
when you drive up or down a steep hill or through a sharp curve. During normal driving the bel t lets you move freely.
Safety belt pretensioners
The safety belts are equipped with a belt pretensioner that helps to
tighten the safety belt and remove slack when the pretensioner is
activated. The function of the pretensioner is monitored by a
warning light=> page
19.
Switchable locking feature
Every safe ty belt excep t the one on the driver seat is equipped with
a switchable locking feature that
must be used when the safety belt
is used to attach a child seat. Be sure to read the important informa­
tion about this feature => page
255.
& WARNING
Improperly positioned safety belts can cause serious injury in an
accident=>
page 216, "Safety belt position" .
• Safety belts offer optimum protection only when the seat back
is upright and belts are properly positioned on the body.
• Never
attach the safety belt to the buckle for another seat.
Attaching the belt to the wrong buckle will reduce safety belt
effectiveness and can cause serious personal injury.
• A passenger who is not properly restrained can be seriously
injured by the safety belt itself when it moves from the stronger
parts of the body into critical areas like the abdomen.
• Always lock the convertible locking retractor when you are
securing a child seat in the vehicle => page
257. •
Safety belt position
Correct belt position is the key to getting maximum
protection from safety belts.
Fig . 228 Head restraint
and safety belt posi­
tion as seen from the
side
Use the height adjustment to change the position of the shoulder
belt of the front safety belts.
& WARNING
Improperly positioned safety belts can cause serious personal
injury in an accident .
• The shoulder belt portion of the safety belt must be positioned
over the middle of the occupant's shoulder and never across the
neck or throat.
• The safety belt must lie flat and snug on the occupant's upper
body => fig. 228. Pull on the belt to tighten if necessary.
• The lap belt portion of the safety belt must be positioned as
low as possible across pelvis and never over the abdomen. Make
sure the belt lies flat and snug => fig. 228. Pull on the belt to
tighten if necessary.
• A loose-fitting safety belt can cause serious injuries by shifting
its position on your body from the strong bones to more vulner -
able, soft tissue and cause serious injury.
~

& WARNING !continued)
• Always read and heed all WARNINGS and other important infor­
mation ~
page 214. •
Pregnant women must also be correctly
restrained
The best way to protect the fetus is to make sure that
expectant mothers always wear safety belts correctly -
throughout the pregnancy.
Fig. 229 Safety belt
position during preg­
nancy
To provide maximum protection, safety belts must always
be positioned correctly on the wearer's body=>
page 216.
-Adjust the front seat and head restraint correctly
=>
page 86, "General recommendations".
- Hold the belt by the tongue and pull it evenly across the
chest and pelvis=> fig. 229, =>
&.
- Inse rt the tongue into the correct buckle of your seat
until you hear it latch securely =>
page 215, fig. 227.
- Pull on the belt to make sure that it is securely latched in
the buckle.
Safety first
Safety belts
& WARNING
Improperly positioned safety belts can cause serious personal
injury in an accident.
• Expectant mothers must always wear the lap portion of the
safety belt as low as possible across the pelvis and below the
rounding of the abdomen.
• Always read and heed all WARNINGS and other important infor ­
mation
~ & in "Fastening safety belts" on page 215. •
Unfastening safety belts
Unbuckle the safety belt with the red release button only
after the vehicle has stopped.
Fig . 230 Releasing the
tongue from the buckle
Push the red release button on the buckle=> fig. 230. The
belt tongue will spring out of the buckle
:::;> &.
Let the belt wind up on the retractor as you guide the belt
tongue to its stowed position.
& WARNING
Never unfasten safety belt while the vehicle is moving . Doing so
will increase your risk of being injured or killed .•
Vehicle care
I I irechnical data