sensor AUDI S8 2009 Owner's Manual

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Ap plies to vehi cles : wi th Ad aptive Cruise Co nt rol
Settings in MMI
The time interval can be set in MM/.
Fig. 162 MMI display :
Adaptive Cruise
Control
Settings in the Adaptive Cruise Control menu are possible
only with the engine running and the vehicle stationary.
- Press the
I CAR) function button.
- Select
Systems in the CAR menu.
Select
Adaptive Cruise Control. The Adaptive Cruise
Control
menu appears.
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). •
System limitations
Applies to vehicles : with Ada ptive C rui se C ont rol
General information
The radar sensor has limits that the driver must know to
be able to use ACC properly.
The Adaptive Cruise Control works within limits that are also related
to radar sensor range and sight distance . In some situations ACC
may react unusually or late from the driver's point of view. There­
fore, always be attentive to what is happening around you and
always be ready to intervene, if necessary:
• when driving around curves=>
page 151.
• when vehicles up front are not in line with your vehicle
=>
page 151.
• when other vehicles are changing lanes=> page 151.
• when other vehicles are difficult to detect=> page 152.
• when vehicles up ahead are not moving or obstacles are in your
travel lane=>
page 152.
& WARNING
The radar sensor's function and range can be reduced by rain,
snow and heavy spray. Moving vehicles up ahead may not be
promptly detected or may not be detected at all.
• Always pay careful attention to the traffic situation and be
ready to intervene and be ready to take complete control when­
ever necessary. •

Adaptive Crui se Control -
---------------=-------'
Applies to vehicles: with Adaptive Cru ise Co nt rol
When driving around curves
k;;;:;::;;;;~==========; ~
o5
J
Entering a curve
Fig . 1 63 V eh ic le
enterin g a c urve
F ig . 164 Vehicle
l ea ving a curv e
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 . 163 . The braking action can be overridden by depressing the
accelerator pedal.
L e avi ng a cu rve
At the end of very long curves, ACC 's predictive lane reading can
cause ACC to react to a nother vehicle in the next lane and app ly the
brakes on your vehicle=> fig. 164 . T he braking action can be over ­
ridden by depressing the accelera tor pedal. •
Contro ls and eq uip­
ment
Ap plies to veh icles: with Adapt ive Crui se Contro l
Vehicles offset to one side
Fig . 165 V ehi cle tra v­
e ling ahe ad outsid e th e
d etec tion r ange of the
ra dar se nsor
Vehic les moving up ahead but offset in the lane cannot be detected
by ACC until they are in sensor range. •
Applies to veh ic les: with Adaptive Cruise Co nt ro l
Lane changes by other vehicles
Fig . 166 A veh ic le
c han ges la ne s
Vehicles that cut into your lane a short distance in front of you
cannot be detected by ACC until they are in sensor range. •
Vehicle care I I irechnical data

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I Not ready: The yellow indicator light shows that the system is
turned on but unable to send a warn ing. This can be due to the
following:
• There are no boundary lines, or there is on ly 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 s ide of the camera viewing window=>
page 153,
fig. 171 is covered with dirt or ice. Clean this part of the windshield.
• The camera v iewing 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
A temporary malfunction is preventing lane assist from operating .
Try turning on lane assist again a t 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 153, fig. 171
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 vehicles: with lane assist
MMI settings
You can use the MM/ to adjust the warning time and
steering wheel vibration.
Setting the warning time
Press the I CAR] function button.
- Select
Systems in the CAR menu.
- Select
Audi lane assist.
Fig. 172 MMI Display :
Setting the warning
time and stee ring
wheel vibration

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Audi side assist
Lane Change Assistant
Applies to vehicles: with side ass ist
Description
The side assist helps you when changing lanes.
[ Audi AS J
Fig. 173 Rear bumper:
Position of radar
sensors (not visible on
outside)
Fig . 174 Signal light
on the outside mirror -
driver's side
Side assist uses radar sensors (not visible on outside) => fig. 173 to
help the driver check blind spots, and see what is happening in
traffic behind the vehicle =>
page 158, fig. 176.
Signal lights are built into both outside mirrors=> fig. 174. The
signal light on the left outside mirror assists when moving over into the left lane and the signal light on the right outside mirror assists
when moving over into the right
lane.
The signal light comes on to tell you that side assist has detected a
vehicle on that side and that the position of this other vehicle
should be taken into account if you were to change lanes. This is
called the
informational stage signal=> page 158. The informational
stage signal is designed so that you notice it only when you are
looking in the outside mirror .
When you activate the turn signal and side assist detects a vehicle in a notable location, the corresponding signal on the outside
mirror flashes briefly and brightly several times. This is the
alert
stage signal
=> page 158. •
App lies to vehicles : with side ass ist
Activating and deactivating
-
Activating
Fig . 175 Cockpit : Side
assist button
Press the button=> fig. 175. The indicator on the button
lights up. ..,

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Deactivating
- Press t he button again . T he ind icato r light on the butto n
goes out.
T he system works at speeds faster than 19 mph (30 km/h) .
& WARNING
• Improper reliance on the side assist system can cause colli­
sions and seriou s per sonal injury:
- Never rely only on side assist when changing lanes .
- Always check rear view mirrors to make sure that it is safe to c hange lanes.
• Side assist cannot detect all vehicles under all conditions­
danger of accident!
• Side assist cannot detect vehicles in time to alert you when
they approach from behind at very high speed , or fall drop back
very quickly.
• The radar sensor's
vision can be reduced or entirely blocked by
rain , snow, and heavy spray . This can result in side assist not
adequately detecting veh icles or , in some cases, not detecting
them at all . Always keep an eye on the direction you are traveling
and the relevant area around the vehicle.
• Please note that side assi st indicates there are approaching
vehicles, or vehicles in your bl ind spot , only after your vehicle has
reached a driving speed of at lea st 19 mph (30 km /h).
• S ide assist signal does not work around tight corners (turning
radiu s less than 328 feet or 100 m ).
• Side assist is no replacement for the driver's full attention . The
d river alone is responsible for lane changes and similar driv ing
maneuvers. Always keep an eye on the d ire ction you are travel ing
and the relevant area around the vehicle .
Controls and equip ­
ment
0 Note
• To e nsu re t hat you do not adverse ly a ffect s ide assist, do not
b lock the area on the rear bumper where the radar sensors are
located w it h f oreign objects (s uch as st ickers or bicycle rac ks).
• M ake su re that the signal light on the o utside mi rror is not
b loc ked by st ic ke rs or ot her items.
[ i ] Tips
• Side ass ist automaticall y deact ivates i f it detects t hat t he ra dar
sensors are blocked=> page
163. The indicator light on the button
goes out.
• The area on the bumper whe re the rada r sen so rs a re loca ted
must cons iste ntly re mai n fr ee o f snow, ice, and heavy so iling so t hat
side assist can function properly. Follow the additiona l notes on
=> page
164.
• Additiona l tinting on the front side windows can make it ha rder
t o see and co rrect ly unde rsta nd the s ignal light o n the outs ide
mirror.
• For Declaratio n of Comp liance to Un ited Sta tes FCC a nd I ndus try
Canada regulations => page
385. •
I • •

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Applies to vehicles: with side ass ist
Sensor detection area
Fig. 176 Sc hem ati c
illu str ati on : Sens or
d etec tio n area
The detection ~ fig. 176 of the radar sensor detection area is made
up of:
• the approach area !light green area)
0, about 230 feet (70 ml
behind the veh icle, and
• the "blind spot" (dark green areal@.
The radar sensors cover the adjacent left and right lanes. Other
lanes are
not covered by the radar sensors .
[ i ] Tip s
Side assist does not measure actual lane width . The system
assumes a fixed lane width. Detection in the left and right lanes is based on this assumed lane width. When driving on narrow roads or
when driving to the left or right of the center of a travel lane, it is
possible that vehicles will be detected that are
not in the lane next
to the lane you are using~
page 163. •
Applies to vehicl es: with side assist
Operation
Side ass ist compares the distance and difference in speed of
detected vehicles with the speed of your vehicle. Whenever the
difference in speed and distance is registered as notab le if you were
to change lanes, a signal light appears on the respective mirror.
The signal can light up if you are passed by a vehicle or if you are
passing another vehicle.
If you pass another vehicle slowly (difference in speed less than 9 mph, or
15 km/h), the signal light will come on as soon as the other
vehicle is in your blind spot and is detected by side assist. When the
difference in speed is greater, the signa l light will not come on .•
Applies to vehic les : w ith side assist
Informational and alert stage signals
Side assist has two signal stages:
• the informational stage signal, and
• the alert stage signal.
Side assist helps you by using the appropriate signa l stage,
depend ing on whether or not you have act ivated the turn signal,
and thus have indicated that you are or are not changing lanes.
In fo rm ati onal stag e signal
As long as you have not activated the turn signa l, side assist informs
you of detected vehicles that are registered as being in a notable location if you were to change lanes. Whenever the detected
vehic le's difference in speed and distance is registered by side
assist as notable, the signa l light on the respective mirror produces
muted il luminatio n.
The brightness of the informationa l stage signal is designed not to
be as intense, so that it does not interfere with your view of the road
when you are driving and have no intention of changing lanes. .,,,

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When you look in the outside mirror, you can clea rly see the infor ­
mational s tage signal.
Ale rt sta ge signal
When you ac tivate the turn signal, and side assist has detected a
vehic le in a notab le location on that particu lar sid e, the signal light
on this side mirror flashes brightly. The repea ted brief and bright
flash ing of the aler t stage signa l reminds you to carefully check
t raffic to the rear in the outside mirror and over your shoulder, so
that you can safely complete the lane change=>
& in "Safety tips"
on
page 164.
[ i ] Tips
T he brightness of the signal light on the outside mirrors can be
adjusted with the
MMI => page 162 . •
Con tro ls and eq uip­
ment
A pp lies to veh ic les: with s ide ass ist
Driving situation : Fast approaching vehicles
Fig . 177 Si de ass ist : Fas t app roac hing veh ic le s
G) Si gn al o n outs ide mirror doe s not li ght up
No vehicle was detected by the sensors. The signal on the outside
mirror does not light up=>
& in "Safety tips" on page 164.
0 Informa tion al st age s ignal ligh ts up
A fast approaching vehicle -in the left-hand lane for example -was
detected by the sensors. Although this vehicle is still far away, it
shou ld be taken into account if you were to change lanes , due to the
consid erable difference in speed. The informationa l stage s ignal on
the outside mirror lights up=>
page 158 .
© Alert stage signal fl ashe s
If you activate your turn signal in driving situation 0 , the signal
briefly flashes repeated ly . Side assist is aler ting you to a vehicle that
you may not have not iced . _,.
Vehicle care I I irechnical data

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[ i J Tips
• The faster a vehicle approaches from the rear, the sooner the
s ignal on the outside mirror lights up . Side assist will signal, at the
latest, when a detected vehicle enters your "blind spot".
• When vehicles approach very quickly, changing lanes can be
dangerous even if the signal on the outside mirror does not light
up. •
Applies to vehicles: with side assist
Driving situation : Slowly approaching
vehicles
Fig. 178 Side assist: Slowly approaching vehicles and vehicles in your blind
spot
G) Signal on outside mirror does not light up
A vehicle approaching slowly -in the left -hand lane for example -
was detected by the sensors. Because of the small difference in speed and the considerable distance from your vehicle, the signal
on
the outside mirror will not light up
~ & in "Safety tips" on
page 164.
© Informational stage signal lights up
The distance between your vehicle and that of the slowly
approaching vehicle has narrowed. The informational stage signal
on the outside mi rror lights up.
As soon as the difference in speed and distance is registered as notable if you were to change lanes, a signal on the mirror lights up .
Side assis t will signal a t the latest when a detected vehicle enters
your "blind spot".
© Alert stage signal flashes
If you activate your turn signal in driving situation©, the signal
light briefly flashes repeatedly . Side assist is alerting you of a
vehicle that you may not have noticed.
[ i J Tips
• The faster a vehicle approaches from the rear, the sooner the
signal on the outside mirror lights up . Side assist will signal , at the
latest, when a detected vehicle enters your "blind spot".
• When veh icles approach very quickly, changing lanes can be
dangerous even if the signal on the outside mirror does not light
up. •

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Ap plies to vehicle s: with side assist
General information
Side assist has lim its and cannot detect vehic les under all road and
weather conditions. P lease remember system limitations and
never
rely on the system, especially when:
• driving through curves=>
page 763,
• lanes are of different widths=> page 163. •
Applie s to vehicles: with side ass ist
When dr iving through curves
Side assist cannot detect vehicles in curves with a turning radius of
less than 328 feet (100 m).
When driving through a curve , it is possible that side assist may
register a vehicle two lanes
over, and the signal on the outside
m irror will ligh t up .•
A pplies to vehicle s: with side ass is t
Lane width
Con tro ls and eq uip­
ment
-
Fi g. 183 Lanes o f a
n orm al w idth are in
d etec tion a rea
Fig . 18 4 Narrow l anes:
Si de ass is t m ay d etec t
v ehicle s tw o la ne s
a w ay
Side assist's detection area is designed to cover lanes of standard
width to the le ft and right o f your trave l lane, depending on whethe r
you drive in the center of your lane or c loser to the edge.
If you drive in narrow lanes, side assist's detection area may also
inc lude other lanes -especially if you tend to dr ive on the edge o f
your lane=> fig . 184. Under these conditions, vehicles can also be
de tected tha t are two lanes away, and s ide assist then could switch
between the informational and warning stage signa ls.
When d riving in
very wide lanes, vehicles in the adjacent lane may
not be detected because they are not inside the detection area. •
Notes
Applies to veh ic les : with s ide ass ist
Messages in instrument cluster display
If side assist turns off automatically, the indicator light on the
button will go out and you will see a message in the instr ument
cluster display:
Audi side a ssist not available : sensors po ssibly blocked
The side assist sensors are built into the rear bumper on the left and
right ( not visible on the outside) =>
page 156, fig. 173 . To ensure that
you do not adversely affect the way side assist functions, foreign .,_
Vehicle care I I irechnical data

• .___A_ u_ d_ i_s_ i_ d _e_ a_ s_ s_is _ t __________________________________________________ _
objects (such as stic kers o r bicyc le rac ks) shou ld no t be attach ed to
th e ar ea on the rea r bump er where t he sen so rs ar e loca ted. I f side
assist functions are adve rsely aff ect ed, you will see this m essage in
th e ins trum ent clu ster dis pla y. Remove an ything that may be
blocking the sensors.
If no veh ic le is detected for a longer period of time while d riving,
s id e ass ist w ill a lso sw itc h off aut omat ica lly.
Audi side assist currently not available
If th ere is a tem porary prob le m (such as the veh ic le 's battery char ge
being low), side ass ist cannot be activated tem porar ily .
Audi side assist: system fault
Have the sys te m chec ked by an a uthorize d A udi dea ler o r qua lified
wor ks h op. •
App lies to veh icles : wi th side ass is t
Safety tips
The side ass is t de tect io n m ay be limi ted whe n driving a round
narrow s treet corners, on hilly streets, and under poor w eat he r
condit ions.
It is possibl e that the r ad ar sen so rs may also d etect oth er obje cts,
such as high or staggered guardrails.
Sid e assis t does no t measure ac tual lane w idth. The sys te m
assu mes a fixed lane widt h. D etect ion in the left and right lanes is
based on thi s assumed lane width . When driving on na rrow roads or
when driv ing to th e left or right of the c enter o f a trav el lane, it is
possible that veh ic les wi ll be detected that are
not in the lane next
to the l ane y ou are us ing .
& WARNING
• Improper reliance on the side assist system can cause colli­
sions and serious personal injury:
& WARNING (continued)
- Never rely only on side assist when changing lanes .
- Always check rear view mirrors to make sure that it is safe to
change lanes .
• Side assist cannot detect all vehicles under all conditions ­
danger of accident !
• Side assist cannot detect vehicles
in time to alert you when
they approach from behind at very high speed , or fall drop back
very quickly.
• The radar sensor's
vision can be reduced or entirely blocked by
rain , snow , and heavy spray. This can result in side assist not
adequately detecting vehicles or, in some cases, not detecting
them at all . Always keep an eye on the direction you are traveling
and the relevant area around the vehicle .
• Please note that side assist indicates there are approaching
vehicles , or vehicles in your blind spot , only after your vehicle has
reached a driving speed of at least 19 mph (30 km /h) .
• Side assist signal does not work around tight corners (turning
radius less than 328 feet , or 100
ml.
• Side assist is no replacement for the driver's full attention. The
driver alone is responsible for lane changes and similar driving
maneuvers . Always keep an eye on the direction you are traveling
and the relevant area around the vehicle .
0 Note
To ensure that s ide assist is not adversely affected , you s hou ld not
block the area on the rea r bumper where the radar sensors a re
l ocated with fo rei gn ob jec ts (such as w ith sti ckers or b icycl e rac ks!. .,,_