cruise control AUDI S8 2008 User Guide

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S itu ation requiring o verrid e of Ada ptive C ruise C ontrol
In some situations you will have to use the foot brake and slow the
vehicle down to keep a safe distance to vehic le in front of you or to
avoid a rear -end co llision.
Pas sing anot her ve hic le
I f you move into the passing lane and no vehic le is detected ahead,
Adaptive Cruise Contro l accelerates to the speed you have set and
maintains it.
O verr ide
You can increase your speed a t any time by stepping on the acceler­
ator pedal. After you release the accelerator pedal, the system auto­
mat ically adjusts back down to the speed you previously set.
[ i J Tips
Please note that the amount of acceleration the Adaptive Cruise
Control uses depends on the Distance setting selected . DISTANCE 1
gives you acceleration that is dynamic and sporty . D IS TA NCE 4, on
the other hand, gives more moderate acce leration . You can find a
detailed description of the "time
intervals" => page 143, "How is
d istance set?". •
Controls a nd eq uip­
ment
Ap plies to vehicles: with Ad apt ive Cru ise Co nt rol
Swit ching th e syst em on and off
Sw itching the system on
- Pull the lever to pos ition G) .
Switching the system off
Fig . 153 C ontrol le ver :
Swi tc hin g on an d off
- Press the lever to position @ (latc hed). •
Applies to vehic les : with Adaptive Cruise Control
Hovv is the speed stor ed ?
Fig . 15 4 C ontro l l eve r:
S tor ing spe ed
Wit h the sy stem switched on the speed is stored as follows: _,,
Vehicle care I I irechnical data

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-Drive at the speed you want. The speed must be between
20 and 95 mph (30 and 150 km/h).
Press the SET button to store the desired speed .
Release the SET button to store mainta in the current speed . The
instrument cluster display shows the stored speed with a red indi ­
cator ligh t. •
Applies to vehi cles: wit h Ada ptiv e C rui se C ont rol
Changing stored speed
Speed can be changed without touching the accelerator
or brake pedal.
Fig . 155 Control lever:
Changing speed
Increasing speed
Press the lever up briefly toward the G). Speed increases
by about 2.5 mph. Canada models: speed will increase by
one mark on the speedometer scale .
-Press the lever up toward 0 and hold it. Speed increases
as long as you keep pressing the lever up.
Reducing speed
-Press the lever down briefly toward the Q . Speed
decreases by 2.5 mph. Canada models: speed will
decrease by one mark on the speedometer scale.
-Press the lever down toward the O and hold it. Speed
decreases as long as you keep pressing the lever down.
[ i] Tips
You can increase your speed at any time by stepping on the acceler­
a tor pedal. After you release the accelerator pedal, the system auto ­
matically adjusts back down to the speed you previously set . A new
desired speed can be stored at any time by pressing the SET
button. •
App lies to vehicl es : w ith Ada ptive Cru ise Co ntro l
Turning Adaptive Cruise Control off
temporarily
In some situations it makes sense to turn Adaptive Cruise Control off temporarily.
Fig . 156 Control lever:
Turning Adaptive
Cruise Control off
temporarily
Performing the following steps turns Adaptive Cruise
Control off temporarily:

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-Step on the brake pedal or
-Press the control lever to the rear (not latched)
~ page 142, fig . 156.
When the system is turned off temporarily , the speed sto red a t the
time is retained.
To resume the stored speed, remove your foot from the brake peda l
and pull the control l ever forward.
Ap plies to vehicles: with Ad apt ive Cru ise Contro l
How is distance set?
Distance can be set in four stages.
Fig . 157 Co ntrol l ever:
Settin g distance
Increasing distance
-Push the s lide r switch once toward G) ~ fig . 157. The
distance currently set is s hown for 3 seconds in the
instrument cluster disp lay.
-Push the s lider sw itch again towar d G), to increase the
dista nce by one step.
Contro ls a nd eq uip­
ment
& WARNING
Improper use of the Ad apti ve C ruise Control can caus e colli sio ns,
other a ccident s and seri ou s per sona l injurie s. Never re sume the
s to red sp ee d if th e speed i s to o high for pr evailin g road , traff ic or
wea th er condition s. •
Reducing distanc e
Push the slider switch once toward Q . The dista nce
current ly set is shown f or 3 seconds in the instrument
cluster d isp lay .
P u sh the s lider switch
again towar d Q, to decrease the
dist ance by one step.
The distance at which Adaptive Cruise Contro l fo llows a vehicle in
front is determined by
time in tervals. A time interval is established
which is mainta ined to a vehicle in front . This produces a speed ­
dependen t interval. The higher the speed , the greater the safe ty
interval in yards (meters) .
For example , if the interval
DIST AN CE 3 is set , a vehicle in front is
followed at a
time interval of 1.8 seconds .
• For a speed of
55 mph th is would be equiva lent to a distance of
4 8 y ard s to the vehic le in front .
• For a speed of
100 km /h this would be equivalent to a distance
of
5 0 m eter s to the vehicle in front. _.
Vehicle care I I irechnical data

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DISTANCE 1 DISTANCE 2 DISTANCE 3 DISTANCE 4
Symbol
~-~---~--~--~---~-~----~
-
Time interval
Dynamics 1 second
Sporting 1.3 seconds
Standard 1
.8 seconds
Standard 2.3
seconds
Comfortable
& WARNING
• Following other vehicles too closely increases the risk of colli­
sions and serious personal injury.
• Setting short distances to the traffic ahead reduces the time
and distance available to bring your vehicle to a safe stop and
makes it even more necessary to pay close attention to traffic.
• Always use good judgment and select a safe following distance
for the traffic, road and weather conditions.
[ i) Tips
• Distance can be adjusted using the slider switch on the lever and
th rough
Adaptive Cruise Control in the MMI menu => page 148. The
settings in the MMI menu are stored automatically and allocated to
the remote control key.
• If the distance was not set in the MMI menu
Adaptive Cruise
Control ,
it is rese t to the fa ctory setting DISTANCE 3 when the igni­
tion is turned on. •
Driver information
Applies to ve hicles: w it h Ad aptive Cru ise Co ntro l
Displays in the instrument cluster
Depending on the driving situation , driver information is
displayed in the instrument cluster.
© Primary display in the speedometer .
Fig. 158 Overview
instrument cluster
@ Supplementary display in the instrument cluster display.
© Message in the instrument cluster display.
© Primary display
Important information concerning vehicle operation with Adaptive
Cruise Control is shown in display area @. Th e desired sp eed you
set is highlighted in the speedometer and the warning lights show
wh ether adjus tmen ts are being mad e for an objec t ahead .
.,,

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This information is always displayed. Display area © is therefore
called the
primary di sp la y .
© S upple men tary displ ay
In display area @ information from the navigation system and the
trip computer is disp layed in addition to information about Adaptive
Cruise Control.
You can select among the different information by repeated brief taps on the RESET button on the windshield wiper
lever => page 39,
"Operation ".
Particularly on your first trips with Adaptive Cruise Control, the
s uppl em en ta ry di spla y should be turned on.
@ Message
The information in area © is not displayed permanently. Informa­
tion is displayed on ly if you change the time interval , if there is a
malfunction or if the Adaptive Cruise Control is turned off. •
Applies to vehicles : with Ada ptive C ruise Cont rol
Primary display in the speedometer
De sire d sp eed
Fig . 159 Prim ary
di spl ay
in the s pee d­
o m ete r
The desired speed set by the driver is displayed with a red LED.
Contro ls a nd eq uip­
ment
The system al lows only speeds from 20 to 95 mph (30 to 150 km/h)
to be set. This speed range is faintly illuminated in the speedometer.
W arn ing lights (symbols )
• ""c:::, Open road: The warning light ,,.,c:::, shows that Adaptive
Cruise Control is active and that no object is ahead of the vehicle . A
stored speed requested is maintained .
• c::::,11 .. c:::, Driving i n tr aff ic: The warning light c:::,11«c:::, indicates that
an object has been detected travel ing in front . Speed is adjus ted
according to the distance set. Adaptive Cruise Control accelerates
and brakes automatica lly.
• c:::,,, ,,c:::, Re quest f or driver t o assume control : The red flashing
warning light
c::::,11 .. c:::, means Reque st for driver to assume control .
You as the driver must slow the vehicle with the foot brake . The
symbo l
c::::,11,,c:::, tells you that the Adaptive Cruise Control is not able
to s low the vehic le down enough to keep a enough distance to the
vehicle in front o f you . A warning tone signal wi ll also sound when
the symbol appears.
[ i ] Tip s
• If the Adaptive Cruise Control initiates braking, the hydraulic
brake system is under pressure. Therefore, the brake pedal distance
is shorter and the peda l feels "harder" .
• I f you use the accelerator to go faster than the speed being main ­
tained by the Adaptive Cruise Control, the system will not warn of
situations that require override of the Adaptive Cruise Control. No
warning light will appear in the instrument cluster display and no gong wil l sound .•
Vehicle care I I irechnical data

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Ap plies to ve hicles : wi th Ad aptive Crui se Co ntro l
Supplementary display
You should have the supplementary information
displayed here, particularly on your first trips.
F ig . 16 0 S upplem en­
t a ry di sp lay
Scrol l through the avai lab le information displays by briefly tapping
the RESET button at the end of the windshie ld wiper lever . You can
select and information from the trip computer, navigation system or
Adaptive Cruise Con trol.
@ Diagram of a vehic le
@ Status
© Distance
@ Diagram of a ve hi cle
Using the v isual representation of a vehicle, you can determine
whether the system is adjusting to an object traveling in fron t.
• With an open road without a vehicle trave ling ahead, only the
outline of the vehi cle is visible .
• A
gray vehicle will appear when a vehic le is de tec ted up ahead.
• If the situation is close to a reques t for the driver to assume
control, a
red vehicle is displayed.
If Adaptive Cruise Control is turned off or no speed is set, no vehicle
is shown.
@ Statu s
• The te xt OFF appears in white letters when Adaptive Cruise
Control is turned off.
• Th e text
AVAILABLE ap pears in white letters when the system is
turned on but no requested speed has been set .
• The text
O V ERRIDE appears in white letters when you exceed the
reques ted speed by accelerating .
• The text
DISTANCE! appears in red letters w hen the interval to a
vehic le traveling ahead is too short and you have to slow your
vehic le add itionally wi th the foot brake.
• The text messages
DISTANCE 1 , DISTANCE 2 , DI STANCE 3 or
DISTANCE 4
appear in green let ters when th is is the time interval
you have set and Adaptive Cruise Cont rol is in management mode.
© Di stan ce
A pointe r (arrow) is shown in this area. When approaching slowly,
this poin ter visual izes the distance to veh icles traveling ahead.
When approaching rapid ly, it serves as early warning of an
impending request for the dr iver to assume contro l. The po inter
moves on a scale from right to left .
Open road: With an open road and no vehicle trave ling ahead, no
pointer is shown .
Driving in traff ic: If a vehicle trave ling ahead is detected, the pointer
moves in the center area of the scale. This area represen ts the
distance set. It is marked
green to make it easier to see .
Request for driver to assume control: In critical situations t he
pointer moves into the
red area of the display. When the pointer
r eaches the farthe st left position, the request for the d river to
assume control is displayed. •

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Ap plie s to vehic les: with Adaptive Cru ise Co nt rol
Messages
The text messages and symbols shown in this area of the
display are not displayed perm anently .
Time interval s
Fig . 16 1 Informa tion
lin e
The different symbols for the time intervals appear if you change the
settings. In addition, there is a display if the gong (audible warning
signa l) is turned off.
The text message ... (three white dots) appears if a setting cannot be
implemented with the operat ing lever. The fol lowing are possible
reasons
• If you pu ll the control lever forward to resume speed but no
requested speed was set.
• I f you push the lever up to increase (or down to reduce) speed
when no speed has been set previously.
• I f you push the lever up (down) to increase (reduce) speed and
this speed is outside the range from 20 to 95 mph !Canada models:
30 to 150 km/h) .
Controls a nd eq uip­
ment
A CC not a vailab le
The text message ACC not av ailabl e appears, for example, if the
temperature of the brakes is excessive . Adaptive Cruise Control is
t emporarily not availab le . A warning tone sounds as a rem inder.
A CC not available !
The text message ACC not av ailabl e! appears in the event of a
malfunction. Adaptive Cruise Control is turned off . A warning tone
sounds as a reminder. Have the system inspected by a qua lified
dea lersh ip.
ACC senso r blocked
The text message AC C s en so r blo cked appears when the ACC
System does not detect any objects over an extended time period .
For the time being, the distance to vehicles up ahead is not being
cont rolled . The ACC system is not switched off, so increased alert ­
ness is required. The following may be reasons for the text message
ACC sensor blocked:
• The ACC sensor is dirty. The ACC system is not react ing, or is not
reacting correctly, to vehic les traveling ahead.
• It is possible that you are driving on a road with very light traffic
without any thing at the side of the road (e.g. guard rai ls, traffic
s igns, trees). As soon as a vehicle is detected by the system again,
it returns to its control range and the text message d isappears .
The ACC sensor is located in the area under the front license plate .
I f there is a loss of operation due to heavy contamination, this area
should cleaned to restore proper operation.
AC C senso r bl ock ed!
The text message ACC sensor blocked! appears when the ACC
System can no longer guarantee safe detection of objects . Adaptive
cruise control is turned off . A chime sounds as a reminder.
To decide whether it is necessary to switch off t he ACC (ACC sensor
blocked!) or if it is only a temporary condition (ACC sensor blocked),
the system wi ll a lso takes into cons ideration the outside tempera -
ture and/or the windshield wiper operation .
.,_
Vehicle care I I irechnical data

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The ACC sensor is dirty or blocked (e.g. leaves, snow).
The ACC sensor is located in the area under the front license plate.
If there is a loss of operation due to heavy contamination, this area
should cleaned to restore proper operation.
EPB activation
The text message EPB activation appears if emergency braking was
initiated with the Electromechanical Parking Brake (EPBl. Adaptive
Cruise Control is turned off. A gong sounds as a reminder.
ESP activation
The text message ESP activation appears if the Electronic Stabiliza ­
tion Program (ESP) has intervened to take control in a critical driving
situation. In this case Adaptive Cruise Control is automatically
turned off . A gong sounds as a reminder .
Speed range
The text message Speed range appears if the current speed is too
low to set or to hold the requested speed.
When setting a desired speed, it must be at least 20 mph (30 km/h).
At speeds below 17 mph (25 km/h), the cruise control is turned off.
Shift lever position!
The text message Shift lever position! appears when the shift select
lever is moved to position
N. In this position, Adaptive Cruise
Control is not available. •
Applies to veh ic les: with Ad apt ive Crui se Contro l
Settings in MMI
The time interval can be set in MM/.
-Press the [CAR] function button.
-Select Systems in the CAR menu.
Fig. 162 MMI display :
Adaptive Cruise Control
-Select Adaptive Cruise Control. The Adaptive Cruise
Control
menu appears~ f ig . 162.
-Select Default setting .
-Select the desired distance.
Setting Distance
In the Basic setting menu you can set the distance (time interval)
using
distance 1, distance 2, distance 3 or distance 4 that Adaptive
Cruise Control is to maintain to a preceding vehicle when in
management mode.
Storing settings
Your individual settings are automatically stored and allocated to
the remote control key being used (remote key personalization) .
~

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[ i J Tip s
Settings in the Adapt ive Crui se C ontrol menu are possib le only with
the engine running and the vehicle stationary .•
Special driving situations
Applies to vehic les: with Adaptive Cru ise Control
General
Some driving situations which affect the function of the
radar sensor are described below.
There are l imits to what Adap tive Cruise Control can do as the
vehicle is driven. So be especially attentive :
• when driving around curves => page
149.
• when driving in staggered lanes of traffic~ page 150.
• when other vehicles are changing lanes::> page 150.
• when other vehicles are difficu lt to detect ~ page 150.
& WARNING
The radar s en sor 's visi on can b e re du ced by rain , snow and h eav y
sp ray. Thi s can re sult in ve h ic les driving ahe ad be ing inade quately
detect ed or , in some cir cum stan ce s, not det ected a t all . •
Contro ls a nd eq uip­
ment
Ap plie s to vehicles: with Adapt ive Cru ise Co nt rol
When driving around curves
~============, J
;g
j
Entering a curve
Fig . 16 3 Ve hicle
e nt erin g a c urv e
F ig . 164 Vehicle
l eav ing a cu rve
When entering a curve, the radar sensor may react to a vehic le in the
next lane and apply the brakes in your
vehicle ~ fig. 163. The
braking action can be stopped by depressing the accelerator pedal.
Lea ving a curve
At the exit from very long curves the pred ictive lane reading can
cause the radar sensor to react to another vehicle in the next lane
and apply the brakes in your
vehic le => fig. 164 . The braking act ion
can be stopped by depressing the accelerator pedal. •
Vehicle care I I irechnical data

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[ i J Tips
You are well advised to keep a supply of spare fuses in your vehicle.
Fuses with the proper ampere ratings are available at your Audi
dealer. •
Fuse Location , Instrument Panel left
Fig . 293 Fuse panel
layout
Some of the equipment items listed are optional or only available on
certain model configurations.
Note that the following table is accurate at the time of going to
press and is subject to change. In the event of discrepancies, the
label on the inside of the cover always takes precedence.
The power windows and the power seats are protected by circuit
breakers, which automatically reset after a few seconds after the
overload -for example if a window is frozen -has been remedied.
No. Equipment
1 Garage door opener (Homelinkl 5
2
Parking assist system 5
3
Parking assist system 5
4
Headlight range control/light control device 10
No.
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Equipment Amps
Instrument cluster 5
Steering column electronics system control 10
Diagnostic connector 5
Diagnostic connector/oil level sensor 5
ESP control unit/steering angle sensor 5
Instrument cluster 5
Audi lane assist 10
Brake light switch 5
Telephone/cell phone 10
Vacant
Access/start control module
5
RSE system 10
Adaptive Cruise Control 5
Heated washer jets 5
Vacant
Tire pressure mon itoring system
5
Vacant
Brake light switch
5
Cell phone preparation 5
Horn 15
Windshield wiper system 40
Vacant Electronic Stabilization Program (ESP)
25
Vacant
Switch illumination
1
Vehicle care Do-it-yourself service irechnical data