sensor AUDI A4 2008 B8 / 4.G User Guide

Lights and vision 60
– Turn the button clockwise +” to increase the brightness
of the instrument lighting in dark conditions.
– Turn the button anti-clockwise -” to reduce the bright-
ness of the instrument lighting in dark conditions.
– Press the knob in again to prevent the setting from being
changed unintentionally.The instrument lighting (dials and needles), the centre console illu-
mination and the illumination of the displays are regulated by a
light sensor incorporated in the instrument cluster. In bright condi-
tions any changes made to the brightness of the instrument lighting
have no effect.
Note
The instrument lighting (illumination of dials and needles) is
switched on when the ignition is on and the vehicle's lights are off.
The instrument lighting is dimmed automatically as the daylight
starts to fade; it is switched off completely when the light condi-
tions become very poor. This function is intended to remind the
driver to switch on the dipped-beam headlights in good time when
light conditions become poor.
Applies to vehicles: with headlight range controlHeadlight range control

When the dipped beam headlights are switched on, the
range of the headlights can be adjusted to suit the load
being carried.– Turn the thumbwheel
 ⇒fig. 58 to the appropriate
setting.
Adjustment settings
The settings correspond roughly to the following load conditions:
Two front occupants, luggage compartment empty
All seats occupied, luggage compartment empty
All seats occupied, luggage compartment loaded
Driver only, luggage compartment loaded
Caution
Always adjust the headlights to avoid dazzling oncoming traffic.
Make sure you lower the headlights when the vehicle is carrying a
heavy load.
Fig. 58 Headlight
range control
AOAIAIIAIII
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Lights and vision65
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– To retract the sun blind automatically when reversing,
select: Function selector button > Windows >
Automatic rear blind > on.If you switch the Automatic rear blind function on in the sound
system or MMI*, the raised sun blind will be retracted automatically
when reverse gear is engaged ⇒page 55. In this way, the rear blind
will not obstruct your vision when reversing. The rear blind returns
to its raised position when reverse gear is disengaged and the
vehicle is driven forwards at a speed above about 15 km/h. The
current setting is automatically stored and assigned to the remote
control key.
If the rear blind was rolled in automatically when reversing and then
the ignition was switched off and on again, the blind will not roll
back out again when you select a forward gear and the speed
exceeds 15 km/h. You will then have to press the button
 on the
centre console to extend the blind again.
The sun blind for the rear window switches off automatically when
it reaches the end position. It can be made to move in the other
direction before it reaches its end position by briefly pressing the
switch a second time. If the ignition is turned off while the blind is
still moving, it continues until it reaches the end position before
switching off.
Note
•
An overload cut-out may be activated if the sun blind is operated
repeatedly. There will then be a short delay before the blind can be
operated again.
•
As the material of the sun blind is less flexible at low tempera-
tures the electric actuator is switched off when the temperature in
the car is below -5°C. The blind can only be operated when the
temperature in the car's interior rises above this level.
Windscreen wipersWindscreen wipers

The windscreen wiper lever controls the windscreen
wipers and the automatic wash and wipe.The windscreen wiper lever has the following settings:
Brief wipe
– Move the lever down to position to give the wind-
screen a brief wipe.
Intermittent wipe

(activating rain sensor)
– Move the lever up to the stop .
– Move the control to the left or right to set the sensi-
tivity of the rain sensor.
Slow wiper speed
– Move the lever up to the stop .
Fast wiper speed
– Move the lever up to the stop .
CAR
Fig. 67 Windscreen
wiper lever
A1
A2
AA
A3A4
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Lights and vision 66
Automatic wash and wipe
– Pull the lever to position .
– Release the lever again. The washer will stop and the
wipers will keep running for approximately 4 seconds.
The number of wipe cycles varies according to the length
of time the lever is pulled.
Switching off the wipers
– Move the lever to the "off" position .General notes
The washers and wipers will only work when the ignition is switched
on.
If you stop briefly, e.g. at traffic lights, the wiper speed will automat-
ically be reduced by one level.
The windscreen washer jets are heated when the ignition is
switched on if the outside temperature is low.
Dribble wipe
About 5 seconds after the wash and wipe cycle has finished, the
windscreen wiper system automatically gives the screen one extra
wipe to remove any dribbles of water.
If you want to deactivate the dribble wipe function while driving,
pull the lever to position again within 10 seconds.
The dribble wipe function will be re-activated the next time the igni-
tion is switched off and on.
Rain sensor*
The rain sensor will only function in the intermittent wipe position.
The intermittent wipe function is activated automatically when it
starts to rain.
Before you reach a road speed of 6 km/h you will have to activate the
rain sensor manually by switching it off and back on again.To reduce the sensitivity level of the rain sensor move control
⇒page 65, fig. 67 to the left. To increase the sensitivity level of the
rain sensor move the control to the right.
If you have selected a high sensitivity level for the rain sensor the
windscreen wipers will react sooner to any moisture on the wind-
screen. The wiper intervals in the intermittent wipe setting are also
varied automatically according to the road speed (in addition to the
sensitivity setting).
WARNING
•
Poor visibility can cause accidents. Always ensure that the
wiper blades are in good condition ⇒page 68, “Changing wiper
blades”.
•
The rain sensor is only intended to assist the driver. The driver
is still obliged to manually operate the windscreen wipers as
required depending on visibility.
•
Do not use water-repellent coatings on the windscreen. In bad
visibility conditions such as light rain, low sun or when driving at
night these coatings can cause increased dazzle, which is a
serious safety hazard. Such coatings can also cause the wiper
blades to judder.Caution
•
In icy conditions, always check that the wiper blades are not
frozen to the glass before using the wiper for the first time. If you
switch on the wipers when the wiper blades are frozen to the glass,
this could damage both the wiper blades and the wiper motor.
•
Make sure you switch off the windscreen wiper system (lever in
position "0") before you use an automatic car wash. This will avoid
inadvertent triggering of the wipers and possible damage to the
wiper system.
A5
A0
A5
AA
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Lights and vision67
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Note
•
Check that the washer fluid reservoir is full before starting a long
journey. Filling the reservoir ⇒page 267.
•
Worn or dirty wiper blades can cause smearing on the glass
which can also impair the effectiveness of the rain sensor. Please
check the wiper blades regularly.
Applies to vehicles: with headlight washersHeadlight washer systemThe headlight washer system only operates when the lights
are switched on.
– Move the automatic wash and wipe lever to position
⇒page 65, fig. 67.The headlight washer system is always activated the first time you
operate the automatic wash and wipe. Subsequently, it is only acti-
vated about every five wash and wipe cycles. The headlights are
always washed if you hold the lever for longer than about
2seconds.
The headlight washer jets come out of the bumper automatically
(under water pressure).
Clean off stubborn dirt (insects, etc.) from the lenses at regular
intervals, for instance when stopping for fuel.
To ensure that the system works properly in winter, keep the nozzle
holders free of snow and remove any ice with a de-icer spray.
Service position
Use the service position to change the wiper blades.You can set the wipers to the service position on the sound
system or MMI*.
– If the wiper blades are not frozen to the windscreen,
move the windscreen wiper lever to the "off" position
⇒page 65, fig. 67.
– Select: Function selector button > Windscreen
wipers > Service position ⇒fig. 68.•
on - the wiper blades can only be replaced when the wiper arms
are in the service position ⇒fig. 69. If you only work on the wipers
A5
Fig. 68 Display: Wind-
screen wipersFig. 69 Service posi-
tion
A0
CAR
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Lights and vision69
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Anti-dazzle setting
– Pull the lever at the bottom of the mirror towards you.Applies to vehicles: with automatic anti-dazzle adjustment for interior mirrorAutomatic anti-dazzle adjustment
The automatic anti-dazzle function can be switched on
and off as desired.Switching off anti-dazzle function
– Press button ⇒fig. 71 - the indicator lamp will go
out.
Switching on anti-dazzle function
– Press button - the indicator lamp will light up.Anti-dazzle function
The anti-dazzle function is activated every time the ignition is
switched on. The green indicator lamp lights up in the mirror
housing.
When the anti-dazzle function is activated the interior mirror will
darken automatically according to the amount of light it receives
(for example from the headlights of a vehicle behind). The mirror
will not darken automatically:
•
when the interior lighting is switched on
•
when reverse gear is engaged
WARNING
Electrolyte fluid can leak from a broken mirror. This fluid can cause
irritation to the skin, eyes, and respiratory organs. Wash thor-
oughly with clean water should you come into contact with this
fluid. Seek medical assistance if needed.
Caution
Electrolyte fluid leaking from a broken mirror can cause damage to
plastic surfaces. Use a sponge or similar to remove the fluid as soon
as possible.
Note
•
If you switch off the anti-dazzle function for the interior mirror,
this will also deactivate the anti-dazzle function for the exterior
mirrors.
•
The automatic anti-dazzle function will only work properly if the
sun blind* for the rear window is not in use and there are no other
objects preventing light from reaching the interior mirror.
•
Do not attach any stickers to the windscreen in front of the
sensors, as these could lead to malfunctioning of the mirror.
Fig. 71 Anti-dazzle
interior mirror: On/off
button with indicator
lamp
AA
AB
AA
AB
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Heating and cooling95
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Note
The grille on the control console ⇒page 94, fig. 103 must be kept
free. Please ensure that it is not covered by stickers or similar. Meas-
uring sensors are located behind it.Applies to vehicles: with deluxe automatic air conditionerSwitching on and offSwitching on air conditioner
– Press the button briefly, or
– Press the button.
Switching off air conditioner
– Press the button to switch off the air conditioner
and cut off the supply of fresh air from outside the
vehicle.The air conditioner will switch on again if one of the control buttons
is pressed.
Applies to vehicles: with deluxe automatic air conditionerAutomatic mode
The standard operating mode for all seasons.Switching on automatic mode
– Select a temperature between +16 °C (60 °F) and +28 °C
(84 °F).
– Press the button.The automatic mode maintains a constant temperature inside the
vehicle and dehumidifies the air. Air temperature, air delivery and
air distribution are regulated automatically to reach the desired
interior temperature as quickly as possible, and then to maintain
this temperature. The system automatically compensates for any
variations in the outside temperature and for the effect of direct
sunlight.
The automatic temperature regulation only operates at temperature
settings between +16 °C and +28 °C. If a temperature below +16 °C
is selected, LO appears on the display. If a temperature above +28 °C
is selected, the display will show HI. In the two extreme settings the
air conditioner operates continuously with maximum cooling or
heating output, and the temperature is not regulated
automatically.

Air distribution
⇒page 97
Defrosting windows
⇒page 98
Heated rear window
⇒page 98
Switching air cooling
on/off
⇒page 98
Seat heating
⇒page 114
a)The rotary control is also used to adjust the blower speed, air distribution
and seat heating.Button(s)
Function
Page
AC
OFFAUTOOFF
AUTO
AUTO
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Heating and cooling103
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Note
•
The grille on the control console ⇒page 102, fig. 112 must be
kept free. Please ensure that it is not covered by stickers or similar.
Measuring sensors are located behind it.
Applies to vehicles: with deluxe automatic air conditioner plusSwitching on and off Switching on air conditioner
– Press the button briefly, or
– Press the button.
Switching off air conditioner
– Press the button for at least 2 seconds to switch off
the air conditioner and cut off the supply of fresh air from
outside the vehicle. The display will show “OFF”.The air conditioner will switch on again if you operate the tempera-
ture control.
Note
You can press the button when the ignition is switched off to
activate the "residual heat" function. The system will then heat the
interior using the remaining heat in the engine coolant.Applies to vehicles: with deluxe automatic air conditioner plusAutomatic mode
The standard operating mode for all seasons.Switching on automatic mode
– Select a temperature between +16 °C (60 °F) and +28 °C
(84 °F).
– Press the button.The automatic mode maintains a constant temperature inside the
vehicle and dehumidifies the air. Air temperature, air delivery and
air distribution are regulated automatically to reach the desired
Button(s)
Function
Page
Switching on and off
⇒page 103
Automatic mode - drivers
side/
front passengers side
⇒page 103
Temperature con-
trol 1
a)
Temperature con-
trol 2a)
a)The rotary control is also used to adjust the blower speed, air distribution
and seat heating.
Temperature selection -
drivers side
Temperature selection -
front passengers side
⇒page 104
Blower - driver's side/
front passenger's side
⇒page 104
b)
b)The symbol differs slightly on some models.
Air recirculation mode
⇒page 105

Air distribution - drivers
side/
front passengers side
⇒page 106
Defrosting windows
⇒page 106
Heated rear window
⇒page 106
Switching air cooling
on/off
⇒page 107
/
Seat heating / seat ventila-
tion
⇒page 114
OFFAUTOAC

OFFAUTOOFF
OFF
AUTO
AUTO
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Heating and cooling109
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Deluxe automatic air conditioner plus
- basic settingsApplies to vehicles: with deluxe automatic air conditioner plusGeneral notes
The basic settings for the air conditioner can be adjusted
via the sound system or MMI*.– Select: Function selector button > control button
AC.The following functions are available:•
Automatic air recirculation ⇒page 109
•
Synchronisation ⇒page 109
•
Auxiliary heating* ⇒page 110
•
Auxiliary ventilation* ⇒page 110
•
Running time* ⇒page 112
•
Timer status* ⇒page 111
•
Timer 1* ⇒page 111
•
Timer 2* ⇒page 111
•
Timer 3* ⇒page 111
•
Supplementary heater* ⇒page 110
Applies to vehicles: with deluxe automatic air conditioner plusAutomatic recirculation
If the outside air is polluted, an air purity sensor in the
vehicle will automatically switch on the air recirculation.To prevent fumes, etc. in the outside air from entering the interior,
we recommend that the automatic air recirculation should be
switched on at all times.
If the air purity sensor in the air conditioner system detects a certain
concentration of fumes in the outside air, the control unit will either
pass the incoming air through the pollution filter or automatically
switch on the air recirculation. If there is a high concentration of
pollution in the outside air, the air conditioner automatically
switches to air recirculation and cuts off the supply of air from the
outside. As soon as the level of pollution decreases, air is fed into
the vehicle from the outside again.
If the windows mist up when the automatic air recirculation is on,
press the
 button immediately.
The automatic air recirculation can switch itself off in certain condi-
tions. If the outside temperature is less than about +10 °C, the auto-
matic air recirculation will only operate for 30 seconds. If the air
conditioner is switched to the ECON mode, or if the outside temper-
ature is less than about -1 °C, the automatic air recirculation will
only operate for 15 seconds.
Applies to vehicles: with deluxe automatic air conditioner plusSynchronisation
The air conditioner settings can be synchronised for all
passengers.When the synchronisation function is switched on, all subsequent
air conditioner settings made on the driver's side (except for the
seat heating*) are also applied to the front passenger's side.
Fig. 120 Display:
Setup AC
CAR
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Heating and cooling115
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: with seat heating for rear seatsSeat heating for rear seats
The seat cushions and backrests of the two outer rear
seats can be heated electrically.– Turn the left thumbwheel (on the centre console) to
switch on and regulate the heating for the left rear seat.
– Turn the right thumbwheel (on the centre console) to
switch on and regulate the heating for the right rear seat.The heating is switched off when the thumbwheel is set to 0.
Possible settings range from 1 to 6.
The heating for the rear seats only operates when a sensor registers
the weight of the occupant in the seat. If nobody is travelling on the
rear seats, please switch off the rear seat heating to avoid activating
it unintentionally.
Caution
To avoid damaging the heating elements of the seat heating, please
do not kneel on the seat or apply sharp pressure at a single point.
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adaptive cruise control (ACC) 128adaptive cruise control (ACC)Speed and distance control systemApplies to vehicles: with adaptive cruise controlDescription
The adaptive cruise control is a combined speed and
distance control system to assist the driver.Adaptive cruise control allows you to maintain any desired constant
speed between 30 and 200 km/h. In addition, the system controls
the distance maintained to the vehicle in front (subject to certain
limitations as described below).
The system can be used to greatest effect on long motorway jour-
neys or on other main roads with long straight sections.
How is the system operated?
The adaptive cruise control system is operated via a control lever on
the steering wheel ⇒page 131, “Setting the speed” and
⇒page 133, “Setting the distance”.Driver messages
When the system is being used, important information is displayed
in the speedometer and on the instrument cluster display screen
⇒page 134, “Driver messages”.
Please note the following points:
The adaptive cruise control has certain limits determined by the
system itself. This means that the driver may in some situations
have to intervene and control the speed and distance to the vehicle
in front himself ⇒page 138, “Driver intervention prompt” and
⇒page 140, “System limitations”.
WARNING
Please always direct your full attention to the road, even when you
are using adaptive cruise control. It is always the driver who is
responsible for determining the speed and for keeping a safe
distance to the other vehicles on the road.•
For safety reasons, the adaptive cruise control must not be
used in city traffic, stop-go traffic, roads with a lot of bends or in
difficult driving conditions (such as ice, fog, loose grit or gravel,
heavy rain, aquaplaning) - this could cause an accident!
•
When you take a turn-off, drive along a motorway exit lane or
pass through roadwork sections, please temporarily switch off the
adaptive cruise control in order to avoid the vehicle accelerating to
the selected speed.
•
The adaptive cruise control can only control the distance to
vehicles in front. As a rule, it cannot recognize vehicles travelling
in other lanes. For this reason, please temporarily switch off the
system if you are travelling in the inside lane and vehicles in the
overtaking lane are travelling at a slower speed than you are.
Otherwise, you would overtake these vehicles on the inside.
Fig. 136 Trim grille
(front right): Position of
radar sensor
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