2008 AUDI A4 change time

adaptive cruise control (ACC) 132
Setting a higher speed
–Briefly move the control lever up towards ⇒fig. 140.
The speed will be incremented by one graduation on the
scale in the speedometer.
– Press the control lever up towards and hold it in this
position. The speed setting is indicated by the diodes in
the speedometer; the speed will be increased accord-
ingly.
Setting a lower speed
–Briefly move the control lever down towards . The
speed will be reduced by one graduation on the scale in
the speedometer.
– Press the control lever down towards and hold it in
this position. The speed setting is indicated by the
diodes in the speedometer; the speed will be reduced
accordingly.After releasing the control lever, the system will adapt your speed to
the setting you have selected.
Following any changes, the new stored speed will be displayed
briefly in the system status indicator ⇒page 136.
Note
You can still use the accelerator pedal at any time to increase speed
in the normal way. The previously programmed speed will be
resumed when the accelerator pedal is released. You can set a new
speed at any time by pressing the button ⇒page 131,
fig. 139.
Applies to vehicles: with adaptive cruise controlSwitching off the system (with speed memory function) and reactivating it
In some situations it makes sense to switch off the
system.Switching off the system (with speed memory
function)
– Press the brake pedal, or
– Press the control lever in direction ⇒fig. 141.
Reactivating the system
– Release the brake pedal and pull the lever in direction .
WARNING
It is dangerous to resume a set speed which is too high for the
current road, traffic or weather conditions - risk of accident.
Note
When switching off the system (with speed memory function) the
speed stored at this point remains in the memory.
A+
A+
A-
A-
SET
Fig. 141 Control lever
for: Switching off the
system (with speed
memory function) and
reactivating it
A2
A1
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adaptive cruise control (ACC) 134
WARNING
When setting the distance, the driver is responsible for adhering
to the laws and regulations which apply in the country he is trav-
elling in.Driver messagesApplies to vehicles: with adaptive cruise controlMessages in the instrument cluster
The instrument cluster displays various driver messages.Fig. 143 Overview of instrument cluster
Indicator lamp and speedometer display
Instrument cluster display
System status indicator Indicator lamp and speedometer display
Section of the display shows important information regarding
the use of the adaptive cruise control system. The target speed you
have set is marked by diodes in the speedometer.
The indicator lamp shows whether the system has detected a
vehicle in front.
Instrument cluster display
You can call up the display for the adaptive cruise control by repeat-
edly pressing the button on the windscreen wiper lever. For
more details refer to ⇒page 27.
System status indicator
The information in section of the display is not shown perma-
nently. It only appears if you, for example, set or change the speed
setting, change the time interval, when messages are displayed, or
if the adaptive cruise control is switched off for safety reasons.
Applies to vehicles: with adaptive cruise controlIndicator lamp and display in the speedometer
AAABAC
AA
AA
AB
RESET
AC
AC
Fig. 144 Instrument
cluster: Indicator lamp
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adaptive cruise control (ACC) 136•
Vehicle in front: If a vehicle is detected in front, the arrows will be
on the scale. The green area of the scale represents the distance
setting. If you approach the vehicle in front slowly, the arrows will
move from the grey area into the green area of the scale.
•
Driver intervention prompt: If you approach the vehicle in front
quickly, the arrows act as a warning. When the actual distance is
shorter (or is likely to become shorter) than the distance selected,
the arrows move into the red area of the scale. In certain situations,
you may need to intervene as the driver ⇒page 138, “Driver inter-
vention prompt”.
Status
•
ACC OFF (in white letters): The adaptive cruise control is
switched off.
•
ACC AVAILABLE (in white letters): The system is switched on but
the control has not yet been activated.
•
OVERRIDE (in white letters): You have exceeded the target speed
by accelerating.
•
DISTANCE! (in red letters): The distance to the vehicle in front is
not sufficient and you have to brake the vehicle with the foot brake.
•
DISTANCE 1 to DISTANCE 4 (in green letters): Shows the time
interval you have selected. The adaptive cruise control is in cruise
mode.
•
DISTANCE 1 - dyn., DISTANCE 1 - comf. etc. (in green letters): If
the settings are adjusted on the sound system or MMI* such that
the “standard” driving program is replaced by “comfort” or
“dynamic”, the message above will indicate the setting.
Applies to vehicles: with adaptive cruise controlSystem status indicator in the instrument cluster display
The text messages and symbols in this section of the
display are not shown permanently.Time intervals (e.g.

)
The various symbols for the time intervals -arrow- ⇒fig. 146 appear
when you change the settings.
The symbol
 indicates that the warning tone has been switched
off.
...
The text message ... (three white dots) appears if a setting made
with the control lever cannot be implemented. There can be several
reasons for this:
•
You have pulled the control lever towards you to resume the
programmed cruising speed, without a target speed having been
set.
•
The control lever has been pushed up / down to increase / reduce
the speed, without a target speed having been set.
AC
Fig. 146 Instrument
cluster: Further infor-
mation
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adaptive cruise control (ACC)137
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
•
The control lever has been pushed up / down to increase / reduce
the speed, but the resulting speed would be outside the range of 30
to 200 km/h.
ACC deactivation
The message ACC deactivation sometimes appears on vehicles with
a manual gearbox. If you press the clutch pedal for longer than
about 20 seconds, the adaptive cruise control will be automatically
deactivated and a warning tone will sound.
ACC not available
The text message ACC not available will appear if, for example, the
brakes are overheated. The adaptive cruise control will then tempo-
rarily not be available. This is indicated by a warning tone.
ACC not available!
The text message ACC not available! appears if a malfunction
should occur. The adaptive cruise control will then be switched off.
This is indicated by a warning tone. Have the system checked by a
qualified workshop.
ACC sensor blocked!
The text message ACC sensor blocked! appears if the ACC system
can no longer detect objects reliably. The adaptive cruise control
will then be switched off. This is indicated by a warning tone.
The ACC sensor is obstructed by dirt or foreign objects (e.g. leaves
or snow). Clean the sensor to restore the function ⇒page 128,
fig. 136.
Engine speed !
On vehicles with manual gearbox, the text message Engine speed !
will appear if the driver does not change gear in time when the
adaptive cruise control accelerates or brakes the vehicle. The adap-
tive cruise control will automatically be deactivated if the engine
speed is not maintained within the permissible range. This is indi-
cated by a warning tone.ESP activation
The text message ESP activation appears if the Electronic Stabilisa-
tion Programme (ESP) has intervened. In this case, the adaptive
cruise control will automatically be switched off. This is indicated by
a warning tone.
Speed (in km/h)
The target speed (in km/h) will appear in the display whenever it is
stored or changed ⇒page 131, “Setting the speed” and
⇒page 131, “Setting a new speed”.
Speed range
The text message speed range appears if the current speed is too
low to set or to maintain the target speed.
To set a target speed, the speed of the vehicle must be at least
30 km/h. The cruise control system switches off if the speed falls
below 20 km/h.
If the speed exceeds 200 km/h (OVERRIDE), the system will remain
active and will reduce the speed to 200 km/h once the driver stops
accelerating.
ACC functionality limited
The text message ACC functionality limited appears if the ACC
system does not detect any objects for an extended period. The
distance to vehicles in front is not being controlled while the
message is displayed. The ACC system is not deactivated, and so
extra care should be taken! The text message ACC functionality
limited can appear for the following reasons:
•
The ACC sensor is dirty. The ACC system is not responding or is
not responding correctly to the vehicles in front!
•
You may be driving on a country road with no traffic and no clear
roadside demarcation (e.g. safety barriers, traffic signs, trees). As
soon as the system detects a vehicle, distance control is resumed
and the text message disappears.
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adaptive cruise control (ACC)139
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
•
An acoustic warning will also sound (unless it has been deacti-
vated in the sound system or MMI* settings).Note
•
Pressing the brake pedal will switch off the adaptive cruise
control system. The speed set at that point will, however, remain
stored until the adaptive cruise control is activated again.
•
To resume the programmed cruising speed, release the brake
pedal and pull the control lever towards you ⇒page 132,
“Switching off the system (with speed memory function) and reacti-
vating it”.
•
If you exceed the target speed by pressing the accelerator, the
driver intervention prompt will not be accompanied by a warning
tone. The indicator lamp shown in the display will also switch off
when the target speed is exceeded.
•
If the adaptive cruise control triggers a braking operation the
hydraulic brake system is under pressure. This is why brake pedal
travel will be shorter and the pedal will feel “harder”.
Applies to vehicles: with adaptive cruise controlSetting the warning tone volume and driving program
You can change the adaptive cruise control settings on
the sound system or MMI* to suit your individual driving
style.– Select: Function selector button > adaptive cruise
control.Setting the volume of the warning tone
If the adaptive cruise control system switches off (e.g. when the ESP
intervenes) or a driver intervention prompt appears, a warning tone
will sound.
You can set the volume of the warning tone to low, medium, or high.
The new volume will sound briefly after making any adjustment. If
you do not want a tone to sound, select off.
Adjusting the basic settings
You can set the distance (time interval) you want the adaptive cruise
control system to keep to the vehicle in front by selecting distance
1, distance 2, distance 3 or distance 4.
Fig. 148 Display: adap-
tive cruise control
CAR
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adaptive cruise control (ACC) 140Setting the driving program
In the Driving program menu you can select either dynamic,
standard or comfort according to your personal preferences.
Note
•
We recommend you to leave the warning tone switched on. Even
when the warning tone is switched off, not every warning tone will
be deactivated.
•
When you pass the key on to somebody else please remember to
make the other driver aware of the ACC settings.
•
We recommend a minimum distance setting of DISTANCE 3
(factory default setting).
•
When the ignition is switched off, the distance setting reverts to
the factory default DISTANCE 3. A qualified workshop can cancel
this function. In this case a default distance setting defined on the
sound system or MMI* is applied each time the engine is started.
System limitationsApplies to vehicles: with adaptive cruise controlGeneral notes
The following situations could impair the function of the
radar sensor.The adaptive cruise control is subject to given physical limits and
also has certain limits determined by the system itself. Under
certain circumstances the driver may feel that the ACC system is
responding unexpectedly or belatedly. For this reason, please
always give your full attention to road traffic and if necessary take
action yourself:•
When driving through bends ⇒page 140.
•
When vehicles in front are not in line with your vehicle
⇒page 141.
•
When other vehicles change lanes ⇒page 141.
•
When other vehicles are not clearly discernible ⇒page 141
•
When vehicles are stationary ⇒page 142.
WARNING
The radar sensor's "field of vision" can be impaired by rain, snow
or a lot of water on the road. This results in vehicles in front not
being properly recognised or, in some circumstances, not being
detected at all. If necessary, take action yourself!Applies to vehicles: with adaptive cruise controlWhen driving through bends
Fig. 149 Driving into a
bendFig. 150 Driving out of
a bend
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adaptive cruise control (ACC) 142Applies to vehicles: with adaptive cruise controlStationary vehiclesIf a vehicle detected by the ACC system turns off or changes lane
and another stationary vehicle is located in front of that vehicle, the
ACC system will not react to the stationary vehicle ⇒fig. 154 and
⇒fig. 155.
Audi braking guardApplies to vehicles: with adaptive cruise controlDescription
Audi braking guard warns you in case of an impending
collision with a vehicle in front.Audi braking guard is active at speeds above approximately 30 km/h
and operates within the system limitations ⇒page 140 even when
the adaptive cruise control is deactivated.
The radar sensor is fitted at the front of the vehicle ⇒page 130,
fig. 137. The system requires reflecting surfaces in order to be able
to measure the distance. If the ACC is unable to measure the
distance it will not respond.
Once the system has measured the distance, it can assess a
dangerous situation where a vehicle in front brakes suddenly or you
are driving fast and approach a vehicle travelling at a much slower
speed. The system warns you as soon as it anticipates that a poten-
tial collision with the vehicle in front can only be avoided by hard
braking or by taking evasive action.
The system has a preset response time so that it can warn you in
time. In certain situations, the system response time will be reduced
dynamically, e.g. when you are accelerating onto a motorway.
Braking, lateral acceleration and steering angle are other factors
Fig. 154 Vehicle
turning off and vehicle
stationaryFig. 155 Vehicle
changing lane and
vehicle stationary
Fig. 156 Instrument
cluster: Display
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Audi lane assist147
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
•
Unfilled lines: The lane assist is switched on but not ready for
warning ⇒page 146, fig. 161,
Version : High-resolution display
•
Solid white lines: The lane assist is switched on and ready to
warn.
•
Solid red line (left or right): The lane assist warns you before you
cross the lane demarcation ⇒page 146, fig. 160.
•
Unfilled lines: The lane assist is switched on but not ready for
warning ⇒page 146, fig. 161.
Messages in the instrument cluster display
Should the lane assist be deactivated automatically, the indicator
lamp in the instrument cluster will go out and one of the following
messages will appear in the instrument cluster display:
Audi lane assist not available: currently no sensor vision
This message is displayed when the camera is no longer functional
after the system has continuously failed to detect the lane mark-
ings. This can have the following causes:
•
The outside of the camera window ⇒page 145, fig. 159 is dirty
or frosted. Please remove dirt or ice from this area of the wind-
screen.
•
The inside of the camera window is misted up. In this case,
please wait for the camera window to demist before switching on
the lane assist system again.
•
Due to the conditions (e.g. snow-covered road) the system has
not been able to detect the lane markings for a long period. Do not
switch the lane assist system on again before the lane markings are
discernible.
Audi lane assist currently not available
A temporary error is preventing the lane assist system from fully
functioning. Try switching on the lane assist system again later.
Audi lane assist: system faultThe system should be checked by an Audi dealership or other qual-
ified workshop.
Applies to vehicles: with lane assistSetting the warning time and steering vibration
You can change the lane assist settings on the sound
system or MMI* to suit your individual preferences.– Select: Function selector button > Audi lane assist.Setting time of warning
early: In this setting, the driver will be warned before a wheel
crosses a lane marking. The warning depends on the angle with
which the vehicle is approaching the lane marking. The larger the
angle with which you are driving towards the marking, the earlier
you will receive the warning, i.e. the distance between the vehicle
and the marking might still be still relatively long. If you are driving
toward the marking at a very narrow angle, you will receive the
warning later, i.e. shortly before one of the wheels touches the
marking.
adaptive: In this setting, the time of warning is adapted to the road
layout and the vehicle's speed. The warning will be received later
when you are driving through a bend, and earlier when you are
AA
AB
Fig. 162 Display:
Setting time of
warning and steering
vibration
CAR
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