steering AUDI S4 2008 Owner's Manual

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)
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 loca ted 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 appr oximately 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 assist145
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Audi lane assistAudi lane assistApplies to vehicles: with lane assistDescription
The lane assist system assist s the driver in keeping the
vehicle in the right lane.The system uses a camera to detect the markings of the lane you are
driving in. If the vehicle approaches one of the detected lane mark-
ings, the steering wheel vibrates to warn the driver that the vehicle
might be about to cross one of the markings. The lane assist system
is functional when it has detected lane markings on both sides of
the lane you are driving in. The green lamp
 in the instrument
cluster indicates that the function is activated and fully functional.
If you operate the turn signal before crossing one of the lane mark-
ings (while the lane assist system is functional), the system will
detect that the lane change is in tended and will not warn the driver.
As the system is designed for driving on motorways and other major
roads, it is only active above a speed of about 65 km/h.
WARNING
•
The lane assist system does not keep the vehicle in its lane. It
merely warns the driver when the vehicle is in danger of crossing
the markings of the lane. As the driver you are always responsible
for staying in your own lane.
•
The camera cannot det ect all lane markings. Therefore it is
possible that variations in the road surface or objects might be
detected as lane markings, which can lead to false warnings, or
warnings not being given.
•
The camera's view might be obst ructed, for example by vehi-
cles travelling in front, rain, snow, a lot of water on the road or adverse light. This can result in
the system not detecting the lane
markings correctly.
Applies to vehicles: with lane assistSwitching on and off– Press the button ⇒fig. 158 -arrow- to switch the system
on and off. The indicator lamp

in the instrument
cluster will light up or go out.
WARNING (continued)
Fig. 158 Turn signal
lever: Pushbutton for
Audi lane assistFig. 159 Windscreen:
Camera window for
Audi lane assist
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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 deacti vated 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 fault The 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 wi ll 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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Audi lane assist
148driving on a straight section. On narrow roads, the system will give
off warnings later than on wide roads.
late : In this setting, the driver will be warned when a wheel crosses
a lane marking.
Setting steering wheel vibration
You can set the steering vibration to low, medium or strong . The
steering wheel will vibrate so that you can check your selection.
Note
•
The lane assist is not active while you are changing the setting;
the brief vibration of the steering wheel is only intended to help you
make the desired setting.
•
Your personal settings are stored automatically and assigned to
the remote control key which is being used.
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Audi drive select159
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Audi drive selectAdjusting the vehicle set-upApplies to vehicles: with Audi drive selectIntroductionAudi drive select allows you to use different set-ups on your vehicle.
Using the three modes COMFORT, AUTO and DYNAMIC, you can
change the set-up at the press of a button for a more comfort-
oriented or dynamic drive.
On vehicles with MMI*, you also have the INDIVIDUAL* mode, which
allows you to adapt the vehicle set-up individually to your personal
driving style. For example, you might choose to combine a more
dynamic engine set-up with a lighter steering response.Applies to vehicles: with Audi drive selectDescriptionThe possible vehicle set-up in each mode depends on which equip-
ment is installed on your vehicle. The engine and the servotronic
power steering are basic parts of your vehicle which are always
included in the set-up. In addition, you can change the characteris-
tics of the automatic gearbox*, dynamic steering* and suspension
control*.
The response of the engine and automatic gearbox* to accelerator
pedal movements will be more spontaneous or balanced,
depending on which mode you select.
The servotronic power steering ⇒ page 225 will also respond to
different drive set-ups.
The dynamic steering* alters the steering ratio depending on the
road speed to optimise the amount of steering effort required by the
driver at any given time. This enables the sensitivity of the steering to be reduced at higher speeds in order to improve the handling of
the vehicle. The steering is more direct at lower speeds to minimise
the amount of steering effort required by the driver, e.g. when
manoevring in tight spaces. The dynamic steering* also provides a
more agile steering response at low and medium speeds. You can
adjust the basic characteristics of the steering in the Audi drive
select menu.
The
suspension control* uses sensors to collect information on
steering movements, braking and acceleration input by the driver,
road surface quality, road speed and vehicle loading. Using this
information, the suspension can be adapted almost instantane-
ously to changing driving conditions. With Audi drive select, the
driver can choose between dynamic and comfort-oriented suspen-
sion set-ups (DYNAMIC and COMF ORT modes), or opt for a more
balanced set-up (AUTO mode).
The following table provides an ov erview of the characteristics in
each driving mode.
If your vehicle is equipped with dynamic steering*, the servotronic
power steering settings are adjusted in the Dynamic steering*
menu.
Systems
COMFORT
AUTO
DYNAMIC
Engine or
engine/gearbox *
Balanced
Balanced
Dynamic
Steering
Comfortable
Balanced
Dynamic
Dynamic steering *
Comfortable
(indirect)
Balanced (direct)
Dynamic (direct)
Suspension control*
Comfortable
Balanced
Dynamic
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Audi drive select
160
Note•
You can select the sport program for gear changes on vehicles
with an automatic gearbox* by activating the DYNAMIC mode. There
is no S position on the selector lever.
•
You may hear a noise on vehicles with dynamic steering* when
you start or stop the engine. This is no cause for concern.
Applies to vehicles: with Audi drive selectSelecting the driving mode
You can choose between COMFORT, AUTO, DYNAMIC and
INDIVIDUAL*.
The control is next to the selector gate ⇒fig. 174 on vehi-
cles with sound system, or in the centre console ⇒fig. 175
on vehicles with MMI*.
– Switch on the ignition.
– Press the left or right arrow button until the desired mode lights up in red.You can change the driving mode while the vehicle is stationary or
moving. If traffic conditions permit , take your foot off the acceler-
ator briefly after you change the mo de so that the new mode is also
activated for the engine.
COMFORT
The COMFORT mode alters the vehicle set-up for a more comfort-
able ride. The response of the engine and automatic gearbox* to
accelerator pedal movements is balanced. The steering is light and
indirect* and the suspension control* is set to soft. This setting is
suitable for driving long distances on motorways for example.
AUTO
The overall impression in AUTO mode is of a comfortable but
dynamic ride. This setting is suitable for everyday use.
DYNAMIC
DYNAMIC gives the vehicle a tighter set-up. The engine reacts spon-
taneously to accelerator pedal movements and the steering is
dynamic and direct*. The suspension control* is stiffer and the
automatic gearbox* changes gear at higher engine speeds. This
setting is ideal for performance driving.
INDIVIDUAL*
You can configure this mode on th e MMI according to your personal
preferences.
Fig. 174 Selector gate:
Control for Audi drive
selectFig. 175 Centre
console: Control for
Audi drive select
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Automatic gearbox167
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Shifting up a gear
– Briefly push the selector lever forwards (in the tiptronic
gate) ⇒page 166, fig. 180 .
Shifting down a gear
– Briefly pull the selector lever backwards (in the tiptronic gate) .With the tiptronic system the driver can manually choose between
7 different pre-programmed gears. The manual programme can be
selected either with the vehicl e stationary or on the move.
When accelerating, the gearbox automa tically shifts up into the next
gear shortly before the maxi mum engine speed is reached.
If you select a gear which is lower than the gear shown in the instru-
ment display ⇒page 166, fig. 181, the gearbox will only shift down
when there is no longer a risk of overrevving the engine.
When the vehicle slows down (for instance when braking), the
gearbox automatically shifts down into the next gear when the
minimum engine speed is reached.
Changing down to a lower gear increases the engine braking effect
on downhill gradients.
When the accelerator pedal is pressed right down past the point of
resistance at full throttle, the ge arbox will select a lower gear,
depending on road speed and engine speed.Applies to vehicles: with multitronic® or tiptronicBack-up programme
A back-up system is in place should a fault occur in the
control system.The automatic gearbox switches to the back-up programme if a fault
should occur in the control system. This is indicated by all segments of the display panel either ligh
ting up together or going out
completely.
It is still possible to move the selector lever to all positions. The
manual shift programme (tiptronic) is not available when the back-
up programme is active.
Vehicles with tiptronic gearbox: When the selector lever is in posi-
tion D or S or in the manual shift programme, the gearbox will
remain in 3rd gear if 1st, 2nd or 3rd gears were engaged when the
fault occurred. The gearbox will remain in 5th gear if 4th, 5th or 6th
gears were engaged. The gearbox wi ll then engage 3rd gear when
you drive away from a standstill or after the engine is restarted.
It will still be possible to use reverse gear in the normal way.
However, the electronic lock for reverse gear will be switched off.
Caution
Should the gearbox ev er switch into the back-up programme, you
should take the vehicle to an Audi dealer or qualified workshop as
soon as possible.Applies to vehicles: Paddle leversSteering wheel with paddle levers
The paddle levers on the steering wheel enable the driver
to manually select pre-programmed ratios or gears.
A+
A…
Fig. 182 Steering
wheel: tiptronic
switches
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Parking aid
174•
Only use the reversing camera to assist you if it is supplying
you with a good and clear picture. The quality of the picture could
be impaired by adverse light, dirt on the lens or a defect (accident
risk).
•
Only use the reversing camera when the boot lid is completely
c lo s e d . P l e a se m a k e su re t h a t t h ere are no objects mounted to the
rear end of the vehicle which coul d block the view of the reversing
camera.Note
•
If your vehicle is near an obstacle, the graphic display will also
appear in the reversing camera image. This superimposed graphic
helps the driver to localise the critical area of the vehicle.
•
You can change the display and adjust the volume and pitch of
the beeps ⇒ page 177.
•
Please refer to the notes on towing ⇒ page 177.
•
There is a slight delay in the picture display.
Applies to vehicles: with Audi parking system advancedParking perpendicular to the roadside
Parking mode 1 can be used when parking your vehicle in
a garage or parking bay.– Turn the steering wheel until the orange orientation lines
are pointing towards the parking space ⇒fig. 192.
You can estimate the distance to an obstacle by referring
to the markings . Each marking is equivalent to
1metre.
WARNING (continued)
Fig. 192 MMI display:
Approaching a parking
spaceFig. 193 MMI display:
Aligning the vehicle
A1
A2
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Parking aid175
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
– Reverse into the space and adapt the steering angle to
the parking space, using the orange lines to assist you
⇒ . indicates the rear bumper. You should stop
reversing, at the latest, when the red orientation line
is bordering on an object ⇒!
– Align your vehicle according to the blue area marking ⇒fig. 193. The blue marking is an extension of the
vehicle outline and reaches about five metres to the rear
of the vehicle. The shade of blue changes at a distance of
approx. 1m, 2m and 5m to the vehicle.
WARNING
•
The reversing camera does not show the complete area behind
the vehicle. It is part icularly important to ensure that there are no
small children or animals near the vehicle, as the reversing camera
may not always be able to detect them (accident risk).
•
Please note that objects whi ch are not touching the ground
may appear to be further away th an they actually are (e.g. the
bumper of a parked ve hicle, a towing bracket or the rear end of a
truck). In this case you should not use the orientation lines as a
guide when parking the car - accident risk!Caution
The MMI display shows the path of th e rear end of the vehicle if you
were to reverse using the current steering angle. NB: The front end
of the vehicle swings out further th an the rear. Please make sure you
keep a sufficient distance between the vehicle and any obstacles to
make sure that the exterior mirror or edge of the vehicle do not
collide with the obstacle (accident risk).
Applies to vehicles: with Audi parking system advancedParking parallel to the roadside
Parking mode 2 can be used when parking your vehicle at
the roadside.The following steps apply only when there are no obstacles
(such as a wall) next to the parking space. Otherwise, please
follow the “Instructions for parking next to obstacles”.
– Position your vehicle parallel to the roadside, about a metre away from the next parked vehicle.
– Engage reverse gear. The parking aid will be switched on and parking mode 1 will be displayed.
A3
A4
Fig. 194 MMI display:
Blue area marking
aligned in parking
spaceFig. 195 MMI display:
Blue marking touches
edge of pavement
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