2008 AUDI S4 Owners Manual

Driving127
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
be deactivated temporarily. The gr
een symbol in the display will
change to white but the stored speed will be retained.
Applies to vehicles: with cruise control systemPre-selecting a speed
You can pre-select a desired speed while the vehicle is
stationary.– Switch on the ignition.
– Pull the lever to position 1 ⇒page 125, fig. 134.
– Push the lever up towards or down towards in order to increase or reduce the cruising speed setting.
– Release the lever to store the cruising speed setting displayed.This function allows you to enter the desired cruise control setting
speed ahead of time, for example before joining a motorway. Once
you are on the motorway, you can activate the cruise control system
by pulling the lever to position .Applies to vehicles: with cruise control systemSwitching off the cruise control systemSwitching off temporarily
– Press the brake pedal, or
– Manual gearbox: Press the clutch pedal for a relatively
long period, or
– Push lever to position (click stop not engaged) ⇒page 125, fig. 134, or – Drive more than 10 km/h faster than the stored speed
over a period of more than 5 minutes.
Switching off completely
– Press the lever to position (click stop engaged), or
– Switch off the ignition.
The speed setting will remain stored after the system is temporarily
deactivated. To resume the programmed cruising speed, release the
clutch or brake pedal and pull the lever to position .
The stored speed will be deleted once the ignition is switched off.
WARNING
Do not resume the programmed crui sing speed if this is too high
for the traffic conditions - this can cause accidents.
AA
A+
A-
A1
AA
A2
AA
A2
A1
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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 ce rtain 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 yo ur 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 condition s (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 th e 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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adaptive cruise control (ACC)129
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
•
Adaptive cruise control will not react when approaching a
stationary obstacle, e.g. the end of a traffic jam or a broken-down
vehicle, or if a vehicle should come towards you in the same lane.
•
Please make sure you do not unintentionally rest your foot on
the accelerator - this will override the adaptive cruise control
system which, as a result, will not automatically brake the vehicle.Note
•
For safety reasons, the speed setting will be deleted when the
ignition is switched off.
•
Switching on the adaptive cruise control automatically activates
the Electronic Stabilisation Program (ESP) and the traction control
system (ASR). These two systems cannot be deactivated while the
adaptive cruise control is switched on.
•
Damage caused by impacts (e.g. if the vehicle is damaged when
parking) can affect the radar sensor settings. This can cause the
system to malfunction or switch off completely.
•
The radar sensor is heated. However, in winter conditions, you
should make sure that the radar sensor is free of ice and snow
before you set off. If necessary, carefully clean the cover of the radar
sensor and the surrounding area ⇒page 128, fig. 136.
•
To make sure that the radar sensor is fully operative, do not
attach any objects (e.g. stickers, add-on parts or other accessories)
to the area surrounding the radar sensor. Do not paint the area
surrounding the radar sensor.
Applies to vehicles: with adaptive cruise control and manual gearboxVehicles with manual gearbox
The driver of a vehicle with a manual gearbox of course
has to change gears as appropriate, even when the adap-
tive cruise control is activated.The adaptive cruise control is available from the second to the sixth
gear (when driven in normal engine speed range).
When the adaptive cruise control is activated, the driver must press
the clutch pedal as normal in order to change gear. When changing
gear or pressing the clutch pedal (for up to 20 seconds), the adap-
tive cruise control will remain activated.
When changing gear, the driver does not have to accelerate after
engaging a gear as the engine torque will be coordinated by the
adaptive cruise control.
The following situations may lead to an automatic deactivation of
the adaptive cruise control :•
pressing the clutch pedal too long (longer than approx.
20 seconds)
•
incorrect changing of gears and/or use of the clutch pedalNote
•
The adaptive cruise control cannot be activated while changing
gears.
WARNING (continued)
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adaptive cruise control (ACC)
130Applies to vehicles: with adaptive cruise controlHow does the distance control work?
Vehicles in front are detected by a radar sensor.The adaptive cruise control uses a radar sensor ⇒fig. 137 which is
integrated in the front of the vehicle and is subject to certain system
limitations ⇒page 140 . Stationary objects are disregarded. 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.
No vehicle in front
When there is no vehicle in front, the adaptive cruise control works
like a speed control system. It maintains a constant target speed
specified by the driver.
Vehicle in front
If you catch up with a vehicle driv ing in front, the adaptive cruise
control will reduce the speed accordingly (within the limits set by
the system ⇒page 138, “Driver intervention prompt” and
⇒ page 140, “System limitations”) and ad apt it to the speed of the
vehicle in front. Then the system will try to adjust the distance to the
car in front according to the settings selected. During the adjust-
ment process the system may temporarily not be able to adhere to
the distance you had specified ⇒ in “Description” on page 128.If the vehicle in front
accelerates, the adaptive cruise control will
also accelerate, up to the target speed you have specified.
Driver intervention prompt
In some situations, it is necessary for the driver to brake the vehicle
with the foot brake in order to keep a safe distance to the vehicle in
front or to avoid a collision. In this case, a warning message will
appear in the display and you will also hear a warning tone
⇒ page 138 .
When overtaking
When you move into the overtaking lane and no vehicle is detected
in front, the adaptive cruise control will accelerate up to the target
speed and then maintain it.
Overriding
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.
Note
•
Please note that acceleration wi ll vary depending on the preset
programme. If you have, for example, selected “Distance 1” and the
driving programme “dynamic”, acceleration will be more "sporty".
However, if you have set the sy stem to “Distance 4” and driving
programme “comfort”, acceleration will be more gradual. For a
detailed description please refer to ⇒page 133, “Setting the
distance”.
•
No vehicle in front , Vehicle in front and a Driver intervention
prompt will be indicated by an indicator lamp ⇒page 134, “Indi-
cator lamp and display in the speedometer”.
Fig. 137 Area covered
by radar sensor
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adaptive cruise control (ACC)131
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: with adaptive cruise controlSwitching the system on and off– Pull the control lever to position ⇒fig. 138 to switch
on the system.
– Press the control lever to position (click stop engaged) to switch the system off.Applies to vehicles: with adaptive cruise controlSetting the speedImportant: The system must be switched on. – Drive at the desired speed. The speed must be in the
range between 30 and 200 km/h.
– Press the button -arrow- ⇒fig. 139 to confirm the
target speed you wish to store.
When the button is released, the current speed is stored in the
memory and the vehicle will then maintain this speed.
One or two red diodes will light up in the speedometer dial
⇒ page 134 to mark the speed which is currently stored in the
system. At the same time, the speed will briefly be displayed in the
system status indicator ⇒page 136 .
Note
For safety reasons, the speed setting will be deleted when the igni-
tion is switched off.Applies to vehicles: with adaptive cruise controlSetting a new speed
The speed can be altered without touching the acceler-
ator or the brake.
Fig. 138 Control lever
for: Switching the
system on and off
A1A2
Fig. 139 Control lever
for: Setting speed
SET
SET
Fig. 140 Control lever
for: Setting a new
speed
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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)133
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Applies to vehicles: with adaptive cruise controlSetting the distance
The distance can be set in 4 different stages.– Briefly press the sliding switch ⇒fig. 142 once towards
or . The display in the instrument cluster will briefly
show the current distance setting.
– Press the sliding switch again towards or to
increase or reduce the distance by one level at a time.Choosing the distance
The adaptive cruise control system determines the distance to the
vehicle in front by time intervals . It defines a time-based distance to
the vehicle in front which is kept at a constant level. This converts
to a distance which depends on the speed - the higher the speed,
the higher the safety distance in metres ⇒.
The actual distance maintained by the adaptive cruise control can
be longer or shorter, depending on the traffic situation and the
driving style of the driver in front.
Distance 1

This setting is suitable for brisk driving in a line of traffic. The time
interval is 1 second. This is equivalent to (for instance):•
A distance of 14 metres at a speed of 50 km/h
•
A distance of 36 metres at a speed of 130 km/h
Distance 2

This setting is suitable for relaxed “moving with the flow” in a line
of traffic. The time interval is 1.3 seconds. This is equivalent to (for
instance):•
A distance of 18 metres at a speed of 50 km/h
•
A distance of 47 metres at a speed of 130 km/h
Distance 3

This (recommended) setting is suitable for relaxed “moving with the
flow” in a line of traffic. The time interval is 1.8 seconds. This is
equivalent to (for instance):•
A distance of 25 metres at a speed of 50 km/h
•
A distance of 65 metres at a speed of 130 km/h
Distance 4

This setting is suitable for single-carriageway roads. The time
interval is 2.3 seconds. This is equivalent to (for instance):•
A distance of 32 metres at a speed of 50 km/h
•
A distance of 83 metres at a speed of 130 km/h
You can control the acceleration and braking response of your
vehicle in adaptive cruise control mode by adjusting the settings on
the sound system or MMI* ⇒page 139 . Depending on the driving
program and distance selected, acceleration and braking response
will range from dynamic (1) to relaxed (5).
Fig. 142 Control lever
for: Setting the
distance
A+
A-
A+
A-
Driving pro-
gram
dynamic
standard
comfort
Distance 1
1
2
3
Distance 2
2
3
4
Distance 3
2
3
4
Distance 4
3
4
5
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adaptive cruise control (ACC)
134
WARNING
When setting the distance, the driv er 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 displa ys 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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