sensor AUDI S6 2008 Owner's Manual

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Adaptive Cruise Control
Speed and distance control system
Applies to vehic les : with Adaptive C ruise Cont rol
Description
The Adaptive Cruise Control driver assistance program is
a combined speed and distance control system.
Fig. 129 Front
bumper: Position of
radar sensor
Any speed between about 20 mph (30 km/h) and about 95 mph
(150 km/h) can be set and he ld with the Adaptive Cruise Con trol. The
system also regulates a pre-set distance from the vehicle ahead
within the limits of the system described.
Driving can be more relaxed, particularly on long trips on interstates
or on other highways that are generally straight.
How does it work?
You can operate the Adaptive Cruise Control using the lever on the
steering wheel column::::> page 137, "How is the speed stored?" and
=> page 140, "How is the distance (time interval) set?".
Con tro ls and eq uip­
ment
Driver information
Important information is brought up in the speedometer and in the
instrument cluster display as the vehicle is being driven
=> page 142, "Driver information" .
What is important for you to know
The Adaptive Cruise Control is set with system -specified limits, that
is, as a driver, you will have to adjust the speed and distance to the
vehic le ahead in some instances=> page 146, "Driver intervention
prompt" and=> page 147, "System limita tions".
& WARNING
Improper use of the Adaptive Cruise Control can cause collisions,
other accidents and serious personal injury .
• Never drive at speeds that are too high for traffic , road and
weather conditions.
• Never follow the vehicle in front so closely that you cannot stop
your vehicle safely. The Adaptive Cruise Control cannot brake the
vehicle safely when you follow another vehicle too closely. Always
remember that the Adaptive Cruise Control has a braking power
that is only about 25% of the vehicle's maximum braking ability,
the automatic braking function cannot bring the vehicle to a stop.
• Never use Adaptive Cruise Control on roads where you cannot
drive safely at a steady speed, including city, stop-and-go or heavy
traffic, on winding roads or when road conditions are poor (for
example, on ice, gravel , in fog , heavy rain or on wet roads that
increase the risk of hydroplaning).
• The radar sensor's
vision can be reduced by rain, snow and
heavy spray. This can result in vehicles driving ahead being inade ­
quately detected or, in some circumstances, not detected at all. If
necessary , take action yourself! ._
Vehicle care I I irechnical data

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& WARNING (continued)
• Always turn off Adaptive Cruise Control when entering turn
lanes, highway exit lanes and construction zones or similar situa ­
tions because the vehicle will automatically accelerate to the
stored speed.
• Never rest your foot on the accelerator pedal, especially when
the Adaptive Cruise Control is being used because doing so will
override the braking function and prevent the brakes from being
applied by the system when it detects a situation when the brakes
must be applied.
• Always remember that the Adaptive Cruise Control has limits -
it does not react when you drive towards an obstacle or some­
thing else on or near the road that is not moving, such as vehicles stopped in a traffic jam, a stalled or disabled vehicle .
• Always remember that the Adaptive Cruise Control cannot
detect a vehicle that is driving towards you in your traffic lane and
that it cannot detect narrow vehicles such as motorcycles and
bicycles .
[ i) Tips
• For safety reasons, the stored speed is deleted when the ignition
is turned off.
• The Electronic Stabilization Program (ESP) and the Anti -Slip
Regulation (ASRl cannot be deactivated when the Adaptive Cruise
Control is switched on. If the ESP and the Anti -Slip Regulation (ASRl
has been deactivated and you then switch on the Adaptive Cruise
Control, the ESP function will also be activated automatically.
• Damage caused by accidents (e.g. if the vehicle is damaged
when parking) can affect the radar sensor settings. This can cause
the system to malfunction or switch off completely.
• The radar sensor cover is heated. In winter conditions, you
should still check before driving to make sure it is free of ice and
snow. If necessary, clean the area near the radar sensor carefully
=>
page 135, fig. 129. • To
ensure that the radar sensor is not blocked, foreign objects
(e.g. stickers, larger license plate mounts, add -on parts) must not
cover the area near the radar sensor=>
page 135, fig. 129. The area
near the radar sensor must not be painted, either. •
Applies to veh ic les: with Adaptive Cruis e Contro l
How does Adaptive Cruise Control work?
Vehicles traveling ahead are detected with the aid of a
radar sensor.
Fig. 130 Radar sensor
measurement range
A radar sensor is built into the front of the vehicle=> fig. 130. The
system is intended to measure the distance to reflective surfaces. If
a measurement is not possible, the system does not respond.
Open road
When the road is clear, the Adaptive Cruise Control works like cruise
control. It maintains a constant target speed specified by the driver.
Driving in traffic
If a vehicle driving ahead is detected, the Adaptive Cruise Control
decelerates (within the limits of the system)=>
page 146, "Driver
intervention prompt" and=>
page 147, "System limitations" to its
speed and after adjusting, tries to maintain the set distance from
the vehicle ahead. The vehicle may temporarily drive slower than
the set speed while adjusting=>
& in "Description" on page 135. .,

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Ap plies to vehicles: with Adaptive Cru ise Co nt rol
System status indicator
The text messages and symbols shown in this area of the
display are not displayed perm anently.
T ime intervals
Fig . 139 Sy stem
sta tus indi cator
The different symbols for the time intervals appear if you change the
settings ~ fig. 139 .
The text message ... (three white dots) appears if a setting cannot be implemented with the operating lever . The following are possible
reasons:
• If you pul l the control lever towards you 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.
• If you push the lever up to increase (or down to reduce) speed
and this speed is outside the range from 20 to 95 mph (Canada
models : 30 to 150 km/h) .
ACC fun cti ona lity limited
The text message AC C functionalit y limited 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
Con tro ls and eq uip­
ment
controlled. The ACC system is not switched off, so increased alert­
ness is required. The following may be reasons for the text message
ACC Functiona lly limited:
• The ACC sensor is dirty. The ACC system is not reacting, or is not
reacting correctly, to veh ic les travel ing ahead.
• I t is possible that you are driving on a road with very light traffic
without anything at the side of the road (e.g. guard rai ls, traffic
signs, trees). As soon as a vehicle is detected by the system again,
it returns to its control range and the text message disappears .
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 .
ACC not available
The text message ACC n ot ava ila ble appears, for example, if the
t emperature of the brakes is excessive. Adap tive Cruise Control is
temporarily not available . A warning tone sounds as a reminder .
ACC not available!
The text message ACC not ava ilable ! appears in the event of a
malfunction . Adaptive Cruise Contro l is tur ned o ff. A warning to ne
sounds as a reminder. Have the system inspected by a qua lified
dea lership .
ACC se nsor bl ocked !
The text message AC C 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 rem inder .
To decide whether it is necessary to switch off the ACC (ACC sensor
blocked
!) or if it is only a temporary condition (ACC functionality
limited), the system wi ll also takes into consideration the outside
temperature and/or the windshield wiper operation.
The ACC sensor is dirty o r blocked (e .g . leaves, sn ow).
Vehicle care I I irechnical data

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The ACC sensor is located in the area under the front license plate .
If there is a loss of opera tion d ue to heavy contam ination, this area
should cleaned to restore proper operation.
E PB activatio n
The text message EPB activation appears if emergency braking was
manual ly initia ted with the Electromechanica l Parking Brake (EPB).
The Adaptive Cruise Contro l is turned off. This is accompanied by a
wa rning tone .
ESP activa tio n
The tex t message ESP activat ion appears i f the Elec tronic Stabil iza ­
tion Program (ESP) has intervened. In this case the Adaptive Cruise
Contr ol is a utomat ical ly turned off . This is accompanied by a
warning tone.
Speed
The set speed in mph (Canada km/h) a lways appears when saving or
cha nging the speed in Adaptive c ruise control =>
page 137, "How is
the speed stored?" and=>
page 138, "Changing stored speed".
Speed range
The text message Speed r ange 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 12 mph (20 km/h), the cruise control is turned off .
In speeds
over 95 mph (150 km/h), the system remains active and
resumes the speed of 95 mph (150 km/h) if the driver removes the
foot from the accelerator .
Selector lever position!
The text message Selector lever po sition! appears when the
selector lever is moved to position N. In this position, Adaptive
Cruise Control is not ava ilable .•
App lies to vehic les: w ith Ad apt ive Cruise Contro l
Driver intervention prompt
The driver intervention promp t calls on the driver to take
over the situation.
F ig . 140 I nstru ment
c lu ster: Dri ver int er­
v ention prompt
In cer tain situati ons, the braking power of t he Adaptive cruise
control is not sufficient to maintain an adequate distance from the
object ahead. In this situation, the Adap tive cruise contro l ca lls on
you as the driver to take action.
The
driver intervent ion prompt a lerts you visual ly and audibly.
• A red vehicle is shown in the instrument c luster disp lay
=> fig. 1 40 .
• The tex t
DISTANCE! appears in the sta tus line.
• The indicator light
,;:::::,11 .. ,;:::::, in the speedometer b links red.
• An warning tone sounds .
[ i ] Tips
• I f the Adaptive cruise control initiates braking, the hydraul ic
brake system is under pressure. Therefore, the brake peda l distance
is shorter and the pedal "feels" harder.
• Adaptive Cruise C ontro l is switched off af ter pressing the foot -
brake. The speed
saved up this point can be resumed. _,,,

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• To resume the saved speed, release the brake pedal and press
t he control lever~
page 139, "Turning Adaptive Cruise Contro l off
temporarily".
• If you use the accelerator to go faster than the speed of the
object ahead of you, the
drive r int erv enti on prompt will not be
accompanied by a warning signal.
• If the speed you previously set is exceeded, the indicator light in
t he speedometer wi ll switch off .•
Appl ies to veh icles : w ith Ada ptive C ru ise Cont rol
MMI settings
Individual settings for Adaptive Cruise C ontr ol can be
selected in the MM/ .
Fig. 1 41 MMI D isplay:
Ad apti ve C ru is e
Co ntrol
Sett ings for t he driving program can be adjusted indiv id u­
ally to the particular user and saved in the MMI. This can
only be done with the eng ine running.
- Press the
I CARI funct ion b utton .
- Selec t
System s* in the CAR menu.
Select
Ad aptive Cruise Control. The Adaptive Cruise
Control
menu appears .
Controls and equip ­
ment
Select driving progr am.
- Selec t the desi red driving program .
Setting th e dri ving p rogr am
In the dri ving program menu you can adjus t the characteristics of
Adaptive Cruise Contro l to what you want using
dyn ami c, s ta ndard
or co mfort .
Saving setting s
Your individual settings are automat ical ly saved and assigned to the
remote contro l key being used (remote key storage). If the key is
given to another person, the saved settings remain as they a re. •
System limitations
Ap plie s t o v ehi cles: with Ad apt ive Crui se Co nt rol
General information
Some driving situations which affect the function of the
radar sensor ore described below.
When driving, the Adaptive Cru ise Control is governed by physical
and system -specified limits. Also, under certain circumstances, the
ACC system may react unexpec tedly or late from the dr iver's point
of view. Therefore, always be attentive and intervene, if necessary :
• when driv ing around curves~
page 148
• when vehicles in front are not in line with your
vehic le ~
page 148
• when other vehicles are changing lanes~ page 149
• when other vehic les are difficu lt to detect~ page 149.
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& WARNING
The radar sensor's vision can be reduced by rain, snow and heavy
spray. This can result in vehicles driving ahead being inadequately
detected or, in some circumstances, not detected at all. If neces­
sary, take action yourself! •
Applies to ve hicle s: with Ad aptive Cruise Co nt rol
When driving around curves
L=~=======; ~
c'i
Entering a curve
Fig. 142 Vehicle
entering a curve
Fig. 143 Vehicle
leaving a curve
When entering a curve, the Adaptive Cruise Control may react to a
vehicle in the next lane and apply the brakes in your vehicle =>
fig. 142. The braking action can be overridden by depressing the
accelerator pedal.
Leaving a curve
At the exit from very long curves the predictive lane reading can
cause th e Adaptive Cruise Control to react to another vehicle in the
next lane and apply the brakes in your vehicle => fig. 143. The
braking action can be over ridden by depressing the accelerator
pedal. •
Applies to ve hicles: w ith Adaptive C ru ise Co nt rol
Vehicles offset to one side
Fig . 144 Vehicle trav­
eling ahead outside the
detection range of the
radar sensor
Vehicles traveling ahead and to one side cannot be detected by the
Adaptive Cruise Control until they are within the detection range of
the sensor. •

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Ap plies t o vehi cle s: wi th Ada ptive Crui se Co nt rol
Lane changes by other vehicles
Fig . 145 A vehicle
changes lanes
Vehicles which move into your lane a short distance ahead cannot
be identified by the Adaptive Cruise Control until they are in the
radar sensor's detection range. •
Applies to veh ic le s: w ith Adap tiv e C ruise Cont rol
Vehicles that are difficult to detect
I
i------------------"-;A
Fig . 146 Two-wheeled
vehicle driving ahead
Vehicles that are d ifficult to detect , e.g. two -wheeled vehicles
ahead, vehicles with high ground clearance, protruding load, are
frequently detected late or not at al l, under some circumstances. •
Contro ls and eq uip­
ment Vehicle care I I irechnical data

Audi lane assist -
----------------
, Not ready: The yellow indicator light shows that the system is
turned on but unable to send a warning. This can be due to the
following:
• There are no boundary lines, or there is only one boundary line
present .
• The boundary lines are not detected (e.g. due to snow, dirt, wet
conditions or light shining into the camera lens).
• More than two boundary lines (such as at construction sites) are
located in the vehicle's lane.
• The vehicle's speed is below the speed needed to activate it,
which is about
40 mph (65 km/h).
• The lane is narrower than about
8 ft. (2.5 ml, or wider than about
16 ft. (5 ml.
• The curve is too sharp.
Notes on the instrument cluster display
When the lane assist turns off automatically, the instrument cluster
indicator goes out and one of the following messages appears on
the display:
Audi lane assist not available: Currently no sensor vision
This message appears when the camera can no longer function
because it cannot detect the boundary lines. This may be due to the
following:
• The exterior side of the camera viewing window=>
page 150,
fig. 148 is covered with dirt or ice. Clean this part of the windshield.
• The camera viewing window is fogged up on the inside. In this
case, wait until the fog disappears before turning lane assist on
again.
• The system was unable to detect boundary lines over an
extended period of time due to road conditions (such as snow­
covered lanes). Do not turn lane assist on again until the lines can
be more easily detected.
Audi lane assist not available
Controls and equip ­
ment A temporary malfunction is preventing
lane assist from operating .
Try turning on lane assist again at a later time.
Audi lane assist: system fault
The system should be checked by an authorized Audi dealer or other qualified workshop.
[ i] Tips
• Make sure that the camera viewing window=> page 150, fig. 148
is not covered by stickers or similar objects .
• Always keep the camera viewing window clean. This can usually
be done by operating the windshield wipers. •
Applies to vehic les: with lane ass ist
MMI settings
You can use the MM/ to adjust the warning time and
steering wheel vibration.
Setting the warning time
Pressthe[CAR]function button.
Select
Systems * in the CAR menu.
Select
Audi lane assist.
I • •
Fig . 149 MMI Display :
Setting the warning
time and steering
wheel vibration

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Audi Parking System
Park Assist Systems
Applies to vehicles: with Aud i Par king System
General Information
Different park assist systems may be used for parking or
maneuvering, depending on the vehicle's features .
Audi P ark ing Sys te m (rea r)*:
For the parking system, the acoustic park assist system is installed
in the rear of the vehicle~
page 167 .
The rear parking assist system uses ultrasonic sensors to determine
the distance of the vehicle from a detected obstacle. There are a
total of four sensors located on the rear bumper (two in the midd le
and two on the sides).
Audi P arki ng Sy stem (r e ar , with r ear -v ie w cam era)*:
For the Audi Parking System (rear, with rear-view camera), the rear
acoustic park assist system is integrated in the rear of the vehicle
and the rear-view camera is integrated in the rear lid~
page 169.
The Audi Parking System (rear, with rear-view camera) uses u ltra ­
sonic sensors to determine the distance of the vehicle from a
detected obstacle. There are a total of four sensors located on the
rear bumper (two in the m idd le and two on the sides). •
Controls and equip­
ment
Audi Parking System (rear)
Applies to vehicles: with Audi Parking System (rear )
Rear acoustic park assist
The rear ac oustic park assist warns y ou of obsta cles or
objects behind your car.
D esc ripti on
The rear acoustic parking assist system determines the distance of
the vehicle from an obstacle using ultrasonic sensors. There are 4
sensors in the rear bumper .
The range at which the sensors start to measure is
about:
To the side
A cti va tio n
2 ft (0.60 ml
5.2 ft ( 1.60 ml
Acoustic parking assist is activated automatically when
rever se gear
is engaged . A brief tone confirms that the system is activated.
Warning tones
Distance warning is given by chimes which are generated by the
rear signal generator. The volume and the pitch of the chimes can
be adjusted in the MMI
~ page 168.
Reversing
Distance warning when reversing starts when an obstacle is
detected in the range of the parking assist system . As the distance
decreases, the time interval between the audible tones becomes
shorter .
When the distance is less than 1ft (0.30 ml, the tone becomes
continuous. At this point you should stop backing up .
I • •

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Please note that low objects already signalled by a warning can
disappear fro m the system 's detectio n range and wil l n ot con tinu e
to be signa lled .
If the distance to an obstacle remains the same, the vo lume of the
d istance wa rni ng i s gradually reduced after a bout 4 seconds .
Approaching another obstacle wi ll result in the distance warning
sound ing at the nor mal vo lume agai n.
Malfunctions in the system
If a warnin g tone is audible for about five seconds when you turn on
the ignition, there is a ma lfunction in the system. Have the prob lem
corrected by y our aut horiz ed Aud i dealer .
Keep the sensors in the rear bumper c lean and free from ice so that
t he acoustic park ass is t sy ste m can f unction pro per ly .
& WARNING
• Sensors have dead spaces in which objects cannot be
detected . Be e specially alert for small children and animals , since
they are not always detected by the sensors.
• The Acoustic Parking System is not a substitute for the dr iver's
own caution and alertne ss. Ultimate respon sibility always
remains with the driver during parking and similar maneuvers .
Always watch where you are driving .
• You should always adjust the volume and frequen cy of the
chimes so that you can easily hear the acoustic distance warning
even if the radio is playing , the air-condit ioner blower is on High or
there i s a high level of out side noise .
- Check the settings whenever anyone else has driven the
vehicle before you.
0 Note
• Reme mber that l ow obstacles for wh ic h a warn ing has already
been issued may "dive" below the system's sensing zone if the
v e h icl e is be ing backed u p closer. In this cas e, th e wa rning so und shutting off does
not indicate that you have c
leared the obstacle .
In stea d, impact is im min ent.
• Objects such as trai ler hitches, chains, narrow posts or fences
cov ered by a t hin lay er of p ain t may no t always be dete cte d by t he
system . T hey can stil l damage your vehicle without warning.
[ i ] Tips
K eep the sensors in the rear bumper clean and free of snow and ice
so tha t the acou stic parki ng a ssis t system ca n fu nc tio n proper ly . •
Ap plie s to v ehic le s : w ith Audi P arki ng Syst em ( re arl
Adjusting the chimes
Th e vo lum e and t he pitc h (freq uency) o f th e c him es can
be adju ste d i n th e
MM/ .
Rear volume adjustment
Pre ss th e [ CAR ] fun ctio n butt on.
S el ect
Audi parking system.
Fig . 166 MMI display :
pa rking system
S elect Rear volume if you want to change t he volume of
t h e rear si gnal genera tor .
~