sensor AUDI S8 2008 User Guide

Openin g and clos ing
All the doors and the rear lid are locked by the central locking
system when you lock the vehicle. You can se t whether generally
only the driver's door or all doors and the rear lid should be
unlocked when you open the vehicle in the MM I menu
C entral
l ock ing
to suit your individual desires=> page 52.
Unlocking the veh icle
You can un lock the vehicle from outside ei ther by using the remote
control
or by turning the key inside the driver's door lock. When you
unlo ck your vehic le:
• The anti -theft alarm system is deactivated briefly .
• The vehicle interior l ights illuminate for approximate ly 30
seconds .
• All turn signal lights will flash twice when the car is unlocked.
• Afte r unlocking the vehic le, you have
60 seconds to open a door
or the rear lid . After
60 seconds, th e vehicle automatically locks and
t he anti -theft a lar m system activates agai n.
The rear lid can be locked or unlocked e ither by using the remote
control
or by turning the key inside the driver 's door lock. Unlocking
the vehic le wit h the remote contro l will on ly
unlock the rear lid, to
open it , the lid handle needs to be pressed.
Lo ckin g the vehicle
Yo u can lock the vehicle from outside either by using the remote
control
or by turning the key inside the dr ivers's door lock . When
you
lo ck the veh ic le:
• All doors and the rear lid are locked.
• All turn signal lights will flash once when the car is locked .
• The anti-theft alarm system is activated. The horn of the anti ­
theft alarm system will sound and the anti -theft a larm system readi ­
ness l ight, located in the upper part o f the driver's door panel, w ill
start to blink .
• The vehicle interior l ights turn off.
Unlo cking and l ocking th e vehicle using the Ad vanced
Key *
The Ad van ced Key * feature is a keyless system which allows you to
unlock the vehicle via sensors in the door hand le . Locking is likewise
keyless using a lock button . Each door is equ ipped w ith a sensor and
lock button.
Power side door closer*
The veh icle is equipped with a power side doo r c lose r. When closing
a door, you s imp ly need to gently push on the door . The door w ill
t hen automa tically c lose by
itse lf => page 53 .
Autom atic l ockin g
The automatic lock ing fea ture locks all the vehicle doors and the
rear lid when you drive faster than
9 mph ( 1 5 km/hl. This funct ion
can be turned on and off in the MMI
Central locking Menu
=> page 52 .
You can unlock the vehicle from the inside by :
• r emovi ng the key from the ignition switc h (the vehicle wi ll auto ­
matically un lock itse lf) or
• pressing the unlock part of the power lock swi tch
m or
pulling the door handle (once to open the door) .
& WARNING
• When you lock your veh icle from out sid e, nobody -espe cially
children - should remain in side the vehicle. Remember , when you
l oc k the vehicle from the out side the windo ws ca nnot be opened
from the inside .
• When you leave the vehi cle , alwa ys remove the ignition key and
take it with you. Thi s will prevent passengers (children , for
e x ample) from ac cidentally being l ocked in the vehi cle should they
ac cidentally pre ss the power locking switch in the doors .
~

Opening and clo sing
Ap plies to vehicles : wi th Adv anced Key
Unlocking the vehicle
You can unlock the doors and rear lid without using the
remote control.
F ig . 46 Ad van ced Ke y:
Un locki ng a door
Grab the door hand le. The door automatica lly unlocks.
Pu ll the doo r handle to open the door.
A door will un lock as you approach a door hand le and the system
senses that you have an authorized key . This applies to each door on
the vehicle . The authorized key only has to be within a range of
about 5 feet (1 .5 meters) from the respective door .
Whenever you un lock a door, the driv er's door also unlocks . You can
set the power lock syste m using the menu in the MMI system, for
example , if you want to unlock just one specific door , or all the
vehic le doors
=> page 52 .
[ i J Tips
If your vehicle has been standing for an extended period, please
note the following:
• To conserve battery power, the sensor wil l turn off after a few
days. When you come back , you will have to pull on the doo r handle
once to unlock the door and then a second time to open the door . •
Again , to conserve battery power so that you can start the
vehic le after it has been standing for a long period, the vehicle's
energy management system will switch off any convenience
features not necessary . You wi ll not be able to unlock your vehicle
using the keyless system .•
A pplies to vehicles : with Adva nc ed Ke y
Locking the vehicle
You can lock the doors and rear lid without using the
remo te control.
F ig . 4 7 Advan ced Key:
L oc king th e vehic le
- Move the selector lever into P.
- Press the lock button in the door hand le to lock the
vehicle ~& -
You can lock each door on the vehicle . Remember, an authorized key
must be within 5 f t (1 .5 meters) of the doo r.
The selector lever must be in the P position , otherwise the vehicle
wi ll not lock.
& WARNING
• When you lo ck your veh icle from out side , nobody -espec ially
c hildren -should rem ain insid e the vehicle . R emember , when you
.,_

Clear vision
Lights
Switching the headlights on and off -'t/-·
In the "AUTO" position, a light sensor automatically
s w itches t he head- and taillights on and off in respo nse to
l igh t con ditions.
Fig . 56 In stru ment
pan el: lig ht sw itch
Switching on automatic headlight control
- T urn th e light switch to AUTO => fig. 56 .
Switching on the side marker lights
- Turn the light switch to ~oo~.
Switching on th e headlights and high beam
- T urn t he light swi tch to io.
- Push the high beam leve r forw ard towards t he instru -
me nt panel
=> page 73 .
Switching off the lights
- T urn t he light switch to 0 .
Contro ls a nd eq uip­
ment
Clear vision
The head lights only work when the ignition is switched on . While
starting the engine or when switching off the ignition, the head ­
lights will go off and only the side marker lights will be on.
After starting the engine, the xenon headlights are automatically
adjus ted to the load and angle of the vehic le (for example, during
acceleration, braking) . This prevents oncoming traffic from experi ­
encing unnecessary headlig ht g lare from your xenon head ligh ts .
If the system is not operating properly, a warning symbol in the
Auto -Check Control is displayed
=> page 36.
With the side marker lights or head ligh ts switched on, the sym bol
next to the light switch illuminates
:oo: .
Daytime running lights
• USA models : The daytime running lights wi ll come on automati­
ca lly when the ig nition is turned on and the ligh t
switch=> fig. 56 is
in the
O position or the AUTO position (only in day light conditions).
The
Daytime running lights function can be turned on and off in the
MMI menu
Exterior lighti ng => page 70 => & .
• Canada models: The dayti me ru nn ing lights wi ll come on auto ­
matically when the ignition is turned on and the light switch
::::> fig. 56 is in the O position or the AUTO p o siti on (only in daylight
conditions)
=> & .
Automati c headligh t control
In the switch position AUTO the a utomatic headligh t cont rol is
turned on . The low beams are turned on automa tica lly through a
light sensor as soon as ambient brightness (e.g . when driving into a
tunnel) fa lls below a value preset at the factory . When ambient
brightness increases again, the low beams are turned off again
automatically =>& .
In the AUTO pos it ion the low beams are switched off automatically
when the ignition is turned off. If the high beams were switched on,
they w ill come o n again the next time the automatic head ligh t
~
Vehicle care I I irechnical data

Clear vision
control is activated. The high beam function must first be switched
on in the MMI
=> page 70 .
Light Sensor Malfunction
In the event of a light sensor mal fu n ct ion, the driver is notified i n the
instrument cluster display :
@ Automatic headlights/automatic wipers defe ctive
For safety reasons the low beams are turned on permanently with
the switch in
AUTO . However, you can continue to turn the lights on
and off us ing the light switch . Have the light sensor checked as soon
as possib le at a dealership .
& WARNING
• Never use dayt ime running lights to see where you are going .
The y are not bright enough and will not let you see f ar enough
ahead for s afet y, espe cially at du sk or when it is d ark. Alwa ys
switch on the low beams at dusk or when it is dark .
• Autom atic he adlight s are onl y intended to a ssist the dr iver.
The y do n ot relie ve the dri ver of his re spon sibility to che ck the
headlights and to turn them on manuall y according to the current
light and vi sibility condi tion s. For example , fog and rain cannot be
dete cted b y the l ight sen sors . S o alway s switch on the he adlights
under these wea the r condition s and when driving in the dark
gD .
• Cra shes can h appen when you c annot see the road ahead and
when you cannot be seen b y other motori sts .
- Alway s turn on the headlight s so that you can see ahead and
s o that others c an see your c ar from the ba ck.
[ i ] Tips
• With the switch in AUTO front fog lights and rear fog lights
cannot be turned on in addition. • I
f you remove the ignition from the ignition lock while the head ­
li ghts are s til l on, a bu zzer w ill sound as long as the driver's door is
open to remind you to turn off the lights .
• Always observe t he specific local regulations for your area as to
when to use your lights .•
Adjusting exterior lighting
The functions are set in the MM/.
F ig . 57 MM I di spla y:
E xt eri or ligh ting
- Pressthe [CAR ]function button.
- Select
Systems in the CAR me nu.
- Selec t
Exterior lighting. The menu Exterior lighting
appears => fig. 57.
C oming home
The Coming home function ensures that after turning off the igni ­
tion and op ening the driv er's door
the vehicle periphery is il lum i­
nated in the dark . In addition, the front fog lights, the tail lights and
t he license plate lig ht are turned on . O n-t ime can be set fo r a period
from
O (off) to 60 seconds. ~

Clear vision
Fig. 75 Left rear roof­
lining: Vanity mirror
folded down
-To fold down, tap the rear edge of the mirror as indicated
by
arrow~ page 79, fig. 74.
As the mirror folds down, it automatically il lumina tes.•
Wiper and washer system
Windshield wiper ~
The windshield wiper lever controls both the windshield
wipers and the washer system.
Fig. 76 Windshield
wiper lever
The windshield wiper lever~ fig. 76 has the following posi ­
tions:
One-touch wiping
-Move the lever to position G) , when you want to wipe the
windshield
briefly.
Intermittent wiping <:S;)l (activating rain sensor)
-Move the lever up to position ®·
-Move switch © up or down, to adjust the sensitivity of
the rain sensor.
Low wiper speed
-Move the lever up to position G).
High wiper speed
-Move the lever up to position @.
Automatic wiper/washer
-Pull the lever to position© (toward the steering wheel)
and hold.
-Release the lever. The washer stops and the wipers keep
going for about four seconds.
Turning off the wipers
-Move the lever back to position @.
The windshield wipers and washer only work when the ignition is
turned on.
The rain sensor is only activated with the wiper leve r set to position
G) . When it starts to rain, the rain sensor will automatically activate
the intermittent wiping mode.
To reduce the sensitivity of the sensor, move switch
@ down. To
increase the sensitivity, move the switch up. The higher you adjust
the sensitivity, the faster the sensor will react when it senses mois-
.,_

ture on the windshield. The rain sensor wiper intervals depend on
t he sensitivi ty setting as well as vehic le speed . Dur ing brief s tops,
wiper motion wil l adjust in re lation to the amount of rain on the
windshield .
During br ief stops, e.g. at a red light, wiper mot ion wil l auto mati ­
ca lly be reduced to the next lower speed . Wipers a lready turning at
low speed. change to i nterm ittent w ip ing.
When the ignition is turned on, the washer jets are heated .
With the low beam headlights switched on, p ull the wiper lever
towards you only briefly to clean the windshield. Ho ld ing the w iper
lever wou ld a lso engage the headlight washer system each time you
clean the w inds hie ld and wou ld dra in t he washer flu id reservoir
pr ematurely .
& WARNING
• Wiper bl ade s are cruc ial for safe driving! Only when they are in
good condition are they able to clear the window s properly to
provide uncompromising visibilit y. Worn or damaged wiper blades
are a safety hazard
::::> page 82 , "In stalling new wiper blade s"!
• The rain sensor is only designed to a ssist and support the
driver . It r em ains entirely th e driver' s respon sibility to monitor
outside weather condit ions and to manually activate the wipers as
s oon a s rain or drizzle reduces visibility through the windshield.
• The windshield mu st not be treated with water-repellent mate ­
rials . They c an in crea se gl are under poor visibility condition s such
as wetness , darkness , or when the sun is low on the horizon. In
addition , they can cau se the wind shield wipers to chatter.
0 Note
In free zing or near freezing conditions:
• Always check that the wiper b lades are not frozen to the glass
be fore you turn the w ipe rs on. Loosen a wiper b lade w hich is frozen
Controls and equip­ ment
Clea r vision
in place before operating the wipers to prevent damage to the wiper
bl ade or the wiper motor.
• Do not use the wipers to clear a frosted window. Using the
wipers as a conve nien t ice scraper will des troy the wiper blades .
• Before you take your vehic le to an automatic car wash, make sure
you have the w inds hield w iper system switched o ff (lever in p osition
O), otherwise the windshield wiper system could get damaged in the
car was h if it should suddenly come o n.
[ i ] Tips
• Make sure the washer flu id reservo ir in the engine compartmen t
is topped off before going on a long trip . Look
up:::> page 323 for
check ing and f illing the washer conta iner.
• I f you sw itch off the ignition with the windshield wiper lever st ill
in the inte rval wi pe pos ition and t hen com e back a wh ile la ter a nd
drive off, the rain sensor wil l reactivate itself after the vehicle speed
has e xceeded 4 mph (6 km/h) .
• Worn or dirty windshie ld wiper b lades cause smearing which
ca n affect t he opera tion of the ra in senso r. Check the condi tion of
your windshield wiper b lades regu lar ly . •
Headlight washer system
The he adlight washer sy stem cle ans the he adlig h ts.
-Oper ate the win dshiel d w ip er/was her sy stem G) wit h th e
hea dlights t urned o n by ho ld ing th e l ever fo r lo nge r than
on e seco nd ::::.,
page 80, fig. 76.
The washe r jets extend f orward out of the fron t bumper dr iven by
water pressure to spray the front head lights with water .
You should inspect the head lights regu lar ly (for examp le when refu -
e ling) a nd c lean o ff any sol id dirt or i nsects from the lenses.
~

Warm and cold -
-----------------'
Rear climate controls
Ap plies to vehic les: with rear a ir co ndition ing
Controls
This overview is to assist you in familiarizing yourself with
the air conditioning controls .
Fig . 140 Air co ndi­
t io ning contr ols
The left side of the display shows the temperature selected for the
rear passenger on the left, the right side shows the temperature
selected for the rear passenger on the right . If the air conditioning
settings are changed, this appears briefly in the corresponding area
of the display.
Functions are turned on and off by to uching the buttons . The LED in
the switch illuminates when the function is turned on .
By pressing the
sa fet y swi tc h ® in the driver's door ~ page 63 the
climate controls in the rear are deactiva ted. The message
P AS SIV E
appears in the display. In this mode the rear climate control can only
be operated by the driver through the contro ls in the front compar t­
ment.
I ON /OFF] Tu rni ng o n and off
The air conditioning can be turned on and off by pressing the
I ON /OFF] button. With the ignit ion Off, the residual heat function
can be activated by pressing the button . The residual heat from the
Contro ls a nd eq uip­
ment
coolant can be used to heat the vehicle interior. The residual heat
f unction is turned off au tomatica lly after 30 minu tes .
Se tting th e te mp era tu re
Temperature can be adjus ted over a range from 64 °F (+ 18 °C) to 80
°F (+26 °C)
(!) A ir di st ribu tion
You can adjust the air circulation so that air flows from specific
vents.
• In the @setting, al l the air flows from the v ents in the center
conso le and the outlets in the door pillars.
• In the
-Or setting, air flows from the outlets under the front seats.
• In
the~ setting, air flows from ou tlets in the center console and
the door pil lars as we ll as from the outlets under the front seats .
To regulate air distribution automatical ly, swi tch to !AUTO].
~ H ea ted se ats*
In posit ion O the heating for the seats is turned off. The range of
adjustment is from 1 to 6 .
The seats can be pre -heated for about 10 minutes us ing the heating.
However , the heating is turned off if the seat sensors do not detect
the weight of an occupant during this period .
[ty) Ventil ate d seats*
The seat cushion and the seat back surfaces of the fron t seats can
be ventilated. In position
O the seat ventilation is turned off. The
range of adjustment is from 1 to 6 .
! AU TO
I Autom ati c o pera tion
Air tempe rature, volume of air and air dis tribu tion are automatically
regulated to achieve or maintain the desired temperatures as
quickly as possible .
.,
Vehicle care I I irechnical data

___ w_ a_ r_ m __ a_n_ d_ c_ o_ld ________________________________________________ _
0 Note
To avoid damage to the heating elements in the seats, do not kneel
on the seats or place heavy loads on a small area of the seat. •
Basic settings [SETUP]
General
The basic settings for the climate control are performed in
the[SETUP] menu.
Fig . 141 MMI display:
Setup climate control
The basic settings for the air conditioning can only be made
with MMI turned on.
- Press the !SETUP] button in the controls to access the
menu.
- Select the desired function using the control knob (driver
or passenger) in the air conditioning controls.
The following functions can be selected:
• ECON
=> page 126
• Automatic recirculation => page 126
• Synchronization => page 127
• Center air vent=> page 127
• Rear seat operation* => page 127
• Solar operation* => page 127•
ECON
The ECON mode helps to save fuel.
The air conditioning is turned off in ECON mode. "ECON" means
"Economy". By switching off the air conditioning (compressor), you
save fuel.
Please note that vehicle interior temperature cannot be lower than
the outside temperature in the ECON mode. The air is not cooled or
dehumidified.
If the vehicle interior becomes too hot or if the windows fog up,
ECON mode should be turned off. As soon as the
(AUTO ] button in
the air conditioning controls is pressed, the system automatically leaves the ECON mode, and the air conditioning compressor is
tu rned on again. •
Automatic recirculation mode
An air quality sensor detects increased concentrations of pollutants in the outside air and automatically switches
to recirculation mode.
We recommend that you always keep automatic air recirculation ON
to prevent polluted outside air from entering the vehicle interior.
If the
air quality sensor located in the air conditioning system
detects polluted outside air, the sensor decides whether the air
pollution can be reduced by the factory-installed pollutant filter or
whether it is necessary to switch to air recirculation . W ith heavy
concentrations of pollutants, the air conditioning system is
switched automatically to recirculation mode and the supply of
outside air is blocked. As soon as the concentration of pollutants in
~

____________________________________________ ..:.A..:.= d:.:a:.! p::. t
.:.: i:..: v :..: e::......: C::.:..: ru=.:.: is::.:e::.....: C::.::: o:..:.n.:..: t:.: r..: o :.: l:...__J9I
Adaptive Cruise Control
Speed and distance control system
Applies to vehicles : with Adaptive C ruise Cont rol
Description
The Adaptive Cruise Control driver assistance program is
a combined speed and distance control system .
Fig. 151 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 held with the Adaptive Cruise Control. The
system also helps keep a distance you previously selected to vehi ­
cles ahead of you.
Adaptive Cruise Control can help reduce driving stress and fatigue
by maintaining a preset speed with automatic braking and acce ler ­
ation. Driving can be more relaxed, particularly on long trips on
interstates or on other highways that are genera lly straight.
How does it work?
A lever on the steering wheel column operates the Adaptive Cruise
Control)=> page 141, "How is the speed stored?" and=> page 143,
"How is distance set?".
Contro ls a nd 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 144, "Driver information".
What is important for you to know
There are limits to what Adaptive Cruise Control can do as the
vehicle is being
driven => page 149, "Special driving situations" .
LJ}. 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 or 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).
• 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 _.,
Vehicle care I I irechnical data

___ A_ d_a_ p_ ti_v _ e_ C_ ru_ is_ e_ C_ o_n_ t_ r_ o _ l ___________________________________________ _
&, WARNING (continued )
appl ied b y the s ystem when it det ects a situation when the brakes
mu st be applied.
• Alway s remember th at Ad aptive Cru ise Control has limits - it
doe s not rea ct when you dri ve toward s an ob stac le or something
e lse on or near the road th at is not mov ing , such as ve hic le s
s topped in a traffic jam , a sta lled or di sabled vehicle.
• Alway s remember th at the Ad aptive Cru ise Control cannot
detect a vehicle that i s driving to wards you in your tr affi c la ne and
that it cannot det ect narrow veh icles su ch a s motor cycles and
bicycle s.
[ i] Tips
• For sa fety reasons, the stored speed is deleted when the ign it ion
is turned off .
• When Adaptive Cru ise Control is switched on, the Electronic
Stabilization Program (ESP) is also automatically activated.
• Damage caused by accidents (e.g . if the vehic le is damaged
when parking) can affect the radar sensor settings. This can cause
the system to malfunct ion or switch off completely.
• In winter conditions, you should check the radar sensor cover
before driving to make sure it is free of ice and snow. If necessary ,
clean the area near the radar sensor
carefully => page 139, fig. 151.
• 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 139, fig . 151. The area
near the radar sensor must not be painted, either .•
Ap plies to vehicles: with Ad aptive Crui se Co nt rol
How does Adaptive Cruise Control work?
Vehicles traveling ahead are detected with the aid of the
radar sensor.
Fi g. 152 Ra dar sens or
me asuremen t range
A forward -look ing radar sens or in the fro nt b umper monitors the
traffic situation ahead . Vehicles moving in your direction can be
de tec ted up to a distance of a bout 140 yards ( 130 meters) but the
Adaptive Cruise Contro l cannot detect vehicles that are stopped or
stal led, obstac les that do not move or narrow vehic les like motorcy ­
cles and
bicycles.=> fig. 152 .
Open road
When the road is clear, Adaptive Cruise Contro l works like cruise
co ntrol. The stored speed requested is main tained .
Driving in tr affi c
If you start to catch up with a vehic le in front of you, Adap tive Cruise
Control automatically slows your vehic le to a speed that will he lp
you stay a safe distance back .
If the vehicle in front acce lerates, Adaptive Cruise Control a lso accel -
erates up to the speed that you have set . .,_