2011 AUDI S8 sensor

Automatic headlights
You can adjust the following settings in the
Automatic headlights menu:
Headlights activation time -You can adjust if
the headlights switch on
Early, Med . or Late
according to the sensitivity of the light sensor.
Audi adaptive light* -You can switch adaptive
light
On and Off.
Daytime running lights
USA models:
You can switch the dayt ime run­
n ing lights
on and off .
Canada models :
The function cannot be
turned off . It is activated automatically each
time the ignition is switched on. This menu
item is shown "greyed out".
Coming home, Leaving home
The coming home function illuminates the
area outside the vehicle when you switch the
ignition off and open the driver's door. To turn
the function on, select
Lights when leaving
car > On .
The leaving home function illuminates the
area outside the vehicle when you un lock the
vehicle. To turn the funct ion on, select
Lights
when unlocking car > On .
The coming home and leaving home functions
only operate when it is dark and the light
switch is in the
AUTO pos ition. Clear
vision 45
Turn signal lever
The lever on the left side of the steering col­
umn is used to operate the turn signals and
the high beam as well as the headlight flash­
er.
Fig. 37 Tu rn signal and high beam lever
The turn signa l and high beam lever has the
following funct ions :
Turn signals ¢ 9 ©@
.,. Push the lever up as fa r as it can go to turn
on the right turn signa l or down to turn on
the left tu rn s ignal ¢
fig. 3 7.
... Move the lever briefly unti l you meet resist­
ance and re lease it to flash three times.
.,. Move the lever (up or down) until you meet
resistance and hold it there to determine
the flashing time for the turn signals.
High beam ~D @
... Push the lever forward to switch on the high
beam .
.,. Pull the lever back towards you to switch
off
the high beam.
Headlight flasher ~D ©
... Pull the lever toward the steering wheel to
use the headlight flasher.
Notes on these features
-The turn signals on ly work w ith the ignition
sw itched on. The indica tor l ights
R or II in
the instrument cluster
¢page 11 also blink.
-Aft er you have turned a corner, the turn sig-
nal switches
off automatically.
- The
high beam works only when the head-
lights are on. The indicator light . in the .,.

(!)-Rain s ensor mode. The windshield wipers
switch on once the vehicle speed exceeds ap­ proximately 2 mph (4 km/h) and it is raining.
The higher the rain sensor sensitivity is set (switch @to the right), the earlier the wind­
shield wipers react to moisture on the wind ­
shield. You can deactivate ra in sensor mode in
the MMI, which will then activate intermittent mode. Select:
ICARI function button> Car sys­
tems
control button > Driver assist > Rain
se nsor
> Off. In intermittent mode, you can
adjust the interval time using the switch @.
@-Slow wiping
®-Fast wiping
@ -Single wipe. If you hold the lever in this
position longer, the wipers switch from slow
wiping to fast wiping.
® -Clean the windshield. The wipers wipe
one time after several seconds of driving to
remove water droplets. You can switch this
f unction
off by moving the lever to position ®
within 10 seconds after the afterwipe . The af ­
terwipe function is reactivated the next time
you switch the ignition on .
Cleaning the headlights. The headlight wash­
er system* only functions when the lights are
switched on. The headlights and the night vi­
sion system camera* are cleaned automatical­ ly the first time the lever is press in position
® and every 8 times it is pressed after that.
They are also cleaned every time you hold the lever in position ® for longer than 8 seconds.
A WARNING
-The rain sensor is only designed to assist
and support the driver. It remains entire­
ly the driver's responsibility to monitor
outside weather conditions and to man­
ually activate the wipers as soon as rain
or drizzle reduces visibility through the
windshield .
- The windshield must not be treated with
water-repellent materials . They can in­
crease glare under poor visibility condi­
tions such as wetness, darkness, or when
the sun is low on the horizon. In addi-
Clear vision 49
tion, they can cause the windshield wip­
ers to chatter.
- Properly functioning windshield wiper
blades are required for a clear view and
safe driving
c:::> page SO, Replacing
windshield wiper blades.
([) Note
-In the case of frost, check whether the
windshield wiper blades are frozen to
the windshield. Switching on the wind­
shield wipers can damage the wiper
blades!
- Prior to using a car wash, the windshield
wiper system must be switched
off (lever
in position 0) . This helps to prevent unin ­
tentional switching on and damage to
the windshield wiper system.
- Do not use the wipers to clear a frosted
window. Using the wipers as a conven­ ient ice scraper will destroy the wiper
blades .
(D Tips
- The windshield wipers are switched off
when the ignition is off. Activate the
windshield wipers after the ignition is
switched back on by moving the wind­
shield wiper lever to any position.
- Worn or dirty windshield wiper blades
result in streaking. This can affect the
rain sensor function . Check your wind­
shield wiper blades regularly .
- The washer fluid nozzles of the wind ­
shield washer system are heated at low
temperatures when the ignition is on.
- When stopping temporarily, e.g. at a
traffic light, the set speed of the wind­
shield wipers is automatically reduced by
one speed.

86 Adaptive cruise control and braking guard
Adaptive cruise control
and braking guard
Introduction
Applies to vehicles: with adaptive cruise co ntrol
The adaptive cruise control system assists the
driver by regulating vehicle speed and helping
to maintain a set distance to the vehicle
ahead, within the limits of the system . If the
system detects a moving vehicle up ahead,
adaptive cruise control can brake and then ac­
celerate your vehicle. This helps to make driv ­
ing more comfortable both on long highway
stretches and in stop -and-go traffic.
Audi braking guard can warn you about an im­ pending collision with a vehicle up ahead that
is slower or has slowed down and start slow­
ing your vehicle down with the brakes
<::> page 92.
Adaptive cruise control and Audi Braking
Guard have technical limitations that you
must know, so please read this section care­
fully, understand how the system works and
use them properly at all times.
General information
General information
Applies to vehicles: with Adapt ive cruise contro l
Fig. 85 Front of th e ve hicle : senso rs a nd video camera
The areas that contain the radar and ultrason­
ic sensors and the video camera
c::> fig . 85
must never be covered by stickers, or other
things or coated with dirt, insects, snow or ice
that will interfere with the Adaptive cruise
control system and Audi braking guard . Re­
move snow with a hand brush and remove ice with a de-icing spray that does not contain
solvents.
The function of the Adaptive cruise control
system and Audi braking guard is limited un­
der some conditions.
- Objects can only be detected when they are
within sensor range
c::> page 88, fig. 88 .
-The system has a limited ability to detect
objects that are a short distance ahead, off
to the side of your vehicle or moving into
your lane from the front or moves into your
lane from the side.
- When driving through curves
r=;> page 87.
-Some kinds of vehicles are hard to detect;
for examp le motorcycles, vehicles with high
ground clearance or overhanging loads mab
be detected when it is too late or they may
not be detected at all.
- Stationary objects
c::> page 87.
A WARNING
Improper use of the adaptive cruise con­
trol can cause collisions, other accidents
and serious personal injury. -
-Never let the comfort and convenience
that adaptive cruise control and Audi
braking guard offer distract you from the
need to be alert to traffic conditions and
the need to remain in full control of your
vehicle at all times,
- Always remember that the adaptive
cru ise control and Audi braking guard
have lim its -they will not slow the vehi­
cle down or maintain the set distance
when you drive towards an obstacle or
something on or near the road that is not
moving, such as vehicles stopped in a
traffic jam, a stalled or disabled vehicle.
If registered by the radar sensors, vehi­
cles or obstacles that are not moving can
trigger a collision warning and if con­
firmed by the video camera, an acute col­ lision warning.
- 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
~

Adaptive cruis e control and bra kin g guard
vehicles such as motorcycles and bicy­
cles.
- The adaptive cruise control system can­
not detect people, animals and cannot
detect objects or traffic that crosses your
lane of travel.
- Never drive at speeds that are too fast for traffic, road and weather conditions.
- Never use adaptive cruise control when
you cannot drive safely at a steady speed, including on wind ing roads or
when road conditions are poor (for exam ­
ple, in construction sites, on ice , gravel,
in fog, heavy ra in or on wet roads that in­
crease the risk of hydroplan ing).
- Never follow a veh icle so closely that you
cannot stop your vehicle safely. The
adaptive cruise cont ro l cannot slow or
brake the veh icle safely when you follow
another veh icle too closely. Always re ­
member that the automatic braking
function cannot bring the vehicle to a
sudden or emergency stop under these
condit ions.
- Never rest your foot on the acce lerator
pedal, especially when the adaptive
cruise control is being used. Pressure on
the accelerator w ill override the adaptive
cruise control braking function and pre­
vent the brakes from being applied whe n
adaptive cruise cont ro l detects a situa­
t io n when the brakes must be applied.
- Never use adaptive cruise control whe n
the radar sensors cannot accurately de­
t ect vehicles moving in t raff ic. The rad ar
sensor's vision can be reduced by heavy
rain, ice, snow, heavy road spray and re­
flect ions from guard rails, t unnel ent ran­
ces, etc. These and simi lar conditions can
prevent vehicles from being accurately
detected and in some cases they may not
be detected at all .
- Always turn off adaptive cru ise contro l
when entering turn lanes, exit lanes and
constr uction zones or in similar sit ua­
t ions because the vehicle will automati­
ca lly accelerate to the sto red speed when
the roa d ahead is clear. -
To prevent unintended operation, a lways
sw itch ACC off when it is not being used .
(D Note
The sensors can be moved by impac ts or
damage to the bumper, wheel housing and underbody . Damage in these areas could
change the way the adaptive cru ise control
system and Aud i brak ing guard work to­
gether . Have your authorized Audi deale r
check to make s ure that the adaptive
cruise control system is wor king p roperly if
your vehicle had a m ino r frontal impact or
was damaged in the area of the sensors.
In curves
Applies to vehicles: wi th adaptive cruise control
Fi g. 86 Exa mpl e: dri vin g into a curve
When dr iving into a curve¢ fig. 86 and out of
a curve, the adaptive c ruise control may react
to a vehicle in the next lane and app ly the
brakes . You c an override or preven t the brak­
ing by pressing the accelerator pedal b riefly .
Stationary objects
Applies to vehicles: wit h adaptive cruise control
Fig. 87 E xam ple: object c hanging l anes a nd s tationa ry
o ~ect
~
8 7

92 Adaptive cruise control and braking guard
-Your standard settings are automatically
stored and assigned to the remote con­
trol key being used .
Audi braking guard
Description
Applies to vehicles: wit h adapt ive c ru ise control
Fig. 94 Instrument cluster: approach warn ing
Audi brak ing guard uses radar sensors and a
video camera . It is active at speeds above
about 6.2 mph (10 km/h) and also works
within system limits when adaptive cruise control is switched off.
On vehicles with aAdaptive cruise control and
Audi side assist (Audi pre sense plus), system
functions also engage when a co llision is im­
minent
¢page 188.
What can Audi braking guard do?
When detected in time, the system can assess
situations when a vehicle ahead brakes sud­
denly or if your own veh icle is traveling at a
h igh speed and approaching a vehicle up
ahead that is moving more slowly. Audi brak­
ing guard does not react if it cannot detect
the situation.
The system advises you of various kinds situa­ tions :
- The
distance warning is given if you are too
close to the vehicle ahead for a long time. If
the vehicle ahead brakes sharply, you will not be able to avoid a coll is ion. The ind icator
light
I i n the d isplay comes on. Take imme ­
diate action to avoid the coll is ion and in­
crease the distance to the vehicle up ahead. -
The
approach warning is given when a de­
tected vehicle up ahead in your lane is mov­
ing much more slowly that you are or if it
brakes sharp ly. When this warning is given,
it may only be possible to avoid a collision
by swerving or braking sharp ly . The indicator
light
I and the symbol in the disp lay will
warn you about the danger
c:> fig. 94 . You
w ill also hear an acoustic signal.
If you do not react fast enough or do not react
at all to the situation, Aud i braking guard w ill
intervene by braking and the message
braking
guard intervention
w ill appear.
- If a coll is ion is imminent, the system will
first provide an
acute warning by brak ing
sharply .
- If you do not react to the acute warning, Au­
di braking guard will brake w ith increased
force in severa l stages to reduce the speed
in a possible collisio n. On ve hicles w ith
adaptive cruise contro l and Audi side assist
(Audi pre sense plus), the system can brake
with increasing force up to maximum decel­
eration shortly before a sensed collision
¢ page 188.
- If
the Audi braking g uard senses that you
are not braking hard enough when a colli­
sion is imminent, it can increase the braking
force.
Audi braking guard takes the driver's reaction
time into consideration in order to provide
timely warnings. The system reaction time de­ creases automatically in some situations, for
example when it detects accelerator pedal use
or steering input . The Audi braking guard in­
tervent ion stops in certa in situations, for ex­
amp le if you press the accelerato r pedal to
pass the vehicle moving ahead of you in your
lane.
Which functions can be controlled?
You can switch Audi braking guard and the
distance/approach warning on or off in the
M M I c:> page 93, Settings in the MMI.

Adaptive cru ise co ntrol and b rakin g guar d 93
A WARNING ,~
The Audi braking guard is an assist system
and cannot prevent a collis ion by itself.
The driver must always intervene. The driv­ er is always responsible for braking at the
co rrect time.
- Always pay close attention to traffic,
even when the Aud i brak ing guard is
switched on. Be ready to intervene and
be ready to take complete control whe n­
ever necessary. Always keep the safe and
legal distance between your vehicle and
vehicles up ahead.
-Audi braking guard works within limits and wi ll not respond outside the system
limits, for examp le when approaching a
stopped vehicle or stationary obstacle
(end of a traff ic jam or vehicle that has
broken down in traffic).
- Always remember that the radar sensor
for the Audi braking guard works only
within defined detect ion and range limits
that may prevent the proper detection of
other vehicles.
- 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 de ­
tected at al l.
- Reflective surfaces includ ing c rash ba rr i­
ers or tunnel en trances may impair the
function of the radar sensor .
(D Tips
Innattention can cause collisions, other ac­
cide nts and serious persona l injuries.
- You can stop the Audi b raking guard in­
te rvention w ith increas ing braking force
by applying the brakes yourse lf or by a c­
ce le rat ing rapidly.
- Audi braking guard error messages
¢page 93.
Settings in the MMI
App lies to vehicles : wi th adap tive c ruise contro l
.,. Select: !CAR ! function button> Car sy ste m s
cont ro l butto n > Driv er a ssist> Audi brak ­
ing gua rd .
S ys tem -
Switch Audi b raking guard On and
Off . When you switch the ign it ion on, the
message
Audi br aking guard off appears in
the instr ument cluster d isp lay if the system is
switched off.
E arly warning -The distance and approach
warnings in the d isplay can be switched
On/
Off.
(D Tips
- Yo ur settings are automatically stored
and assigned to the remote cont ro l key
being used at the times the settings are
made.
- If you switch the ESP to sport mode, A u­
di braking guard switches off a utomati ­
cally
¢page 192.
Messages
App lies to vehicles : wi th adap tive c ruise control
ACC una vailable
ACC and braking guard: unavailabl e
The system cannot detect moving vehicles up
ahead co rrectly and is switched off . The sen­
sors have been d isplaced or are not worki ng
proper ly. The Audi pre sense functions may a l­
so be affected.
ACC: unavailabl e at this time. No sensor vi ­
s ion
ACC and b rak ing gu ide: una vailable at this
time . No s enso r vision
This message appears if the sensor view is ob­
structed, for examp le by leaves, snow, heavy
spray or d irt . Clean the sensors¢
page 86,
fig. 85.
ACC: unav ailable at this time. Incline too
steep

96 Audi lane assist
Messages in 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:
- T he exterior side of the camera viewing win­
dow
r:!:> fig. 96 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 unab le 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 as ­
sist again at a later t ime.
Audi lane assist: system fault
The system should be checked by an author­
ized Audi dealer or other qualified workshop.
(D} Tips
-Make sure that the camera v iewing win­
dow
r:!:> fig. 96 is not covered by st ickers
or similar objects.
- Always keep the camera viewing window
clean . This can usually be done by oper­
at ing the w indshield wipers.
Lane assist display in the instrument
cluster
Applies to vehicles: with lane assist
Fig. 97 Display: lane assist is switched on and is warn­
ing
Fig. 98 Instrument cluster: lane assist is sw itc hed on
but not ready to provide warn ings
You can call up the lane assist display using
the buttons in the mu ltifunction steering
wheel
r:!:> page 2 3.
When lane assist is switched on, the system
indicates which lines are detected by display­
ing solid lines on the left and/or r ight side of
you r vehicle:
- white solid line: lane assist is sw itched on
and ready to provide warnings on the side
that is ind icated
- red solid line (left or right): lane assist is
warning you that you are about to leave your lane
¢fig. 97 .
- unf illed lines: lane assist is switched on but
is not ready to provide warnings
r:!:> fig . 98.
Message s in the instrument cluster
display
When the lane assist turns off automatically,
the instrument cluster indicator goes out and
o ne of the following messages appears on the
display: ..,.

Audi lane assist: currently not available. no
sensor vision
This message appears if the camera is unable
to detect the lines. This could happen if:
- The camera field of view
c::> page 95, fig . 96
is dirty or covered in ice. Clean the area on
the windshield.
- The camera field of view is fogged over. Wait
until the fog has cleared before switching
lane assist on.
- The system has been unable to detect the
lanes for an extended period of time due to
road conditions such as lanes covered in
snow. Switch lane assist back on when the
lines are more visible.
Audi lane assist: currently not available
There is a temporary lane assist malfunction.
Try switching lane assist on again later.
Audi lane assist: system fault
Drive to your authorized Audi dealer immedi­
ately to have the malfunction corrected.
Setting the warning point and steering
wheel vibration
App lies to vehicles: with lane ass ist
You can adjust individual settings in the MMI.
~ Select : ICARI function button> Car systems
control button > Driver assist > Audi lane
assist.
Setting the warning point Early:
With this setting, a warning is provided
before a wheel touches the detected lane
boundary line. The warning depends on the
angle in which the vehicle is approaching the
line. The distance at which the warning is giv­
en increases as the angle becomes sharper. If
you drive toward a boundary line at a very sharp angle, the warning will come just before
a wheel touches the line.
Medium: With this setting, the warning point
is adapted to the course of the road, the lane
width and the speed. You will still be warned
Audi lane assist 97
if you cross slightly over a dotted line when
driving on curves.
Late: This setting has the same properties as
medium. You will only be warned once a
wheel crosses a detected line.
Setting the steering wheel vibration
The steering wheel vibration can be set to
Low, Medium or Strong. Selecting each of the
settings will cause the steering wheel to vi­
brate so you can check the strength of the vi­
bration in that setting.
(D Tips
Your settings are automatically stored and
assigned to the remote control key being
used.