Driving comfortVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equip‐
ment is also described that is not available in a
vehicle, e. g., because of the selected optional
equipment or country variant. This also applies
for safety-related functions and systems.
Active Cruise Control with Stop & Go function, ACC
The conceptThis system can be used to select a desired
speed that the vehicle will maintain automati‐
cally on clear roads.
To the extent possible, the system automati‐
cally adjusts the speed to a slower vehicle
ahead of you.
The distance that the vehicle maintains to the
vehicle ahead of you can be varied.
For safety reasons, it depends on the speed.
To maintain a certain distance, the system au‐
tomatically reduces the speed, applies the
brakes lightly, or accelerates again if the vehi‐
cle ahead begins moving faster.
If the vehicle ahead of you brakes to a halt, the
system is able to detect this within the given
system limits. If the vehicle ahead of your
drives away again from a halt, your vehicle is
able to accelerate if operated accordingly.
Even if some time passes before the vehicle
ahead of you drives away again, your own vehi‐
cle can still be accelerated automatically and
simply.
As soon as the road is clear, it accelerates to
the desired speed.The speed is also maintained on downhill gra‐
dients, but may not be maintained on uphill
slopes if engine power is insufficient.
General information
Depending on the set driving program, the
characteristics of the cruise control can
change in certain areas.
Hints Personal responsibility
Even an active system does not release
the driver from personal responsibility for the
driving process, especially for lane tracking,
adaptation of speed, distance and driving style
to the traffic conditions.
Because of technical system limits, the system
cannot independently react appropriately in all
traffic situations.
Monitor the driving process, the surrounding
area and what is occurring in traffic continu‐
ously and attentively and actively intervene as
required, e.g., by braking, steering or making an evasive maneuver.◀
Unfavorable weather conditions
In the event of unfavorable weather and
light conditions, e. g. if there is rain, snowfall,
slush, fog or glare, this may result in poorer
recognition of vehicles and lane limits as well
as short-term interruptions for vehicles that are
already detected. Drive attentively, and react to
the current traffic events. Intervene actively
when necessary, e.g., by braking, steering or
making an evasive maneuver, otherwise, there
is danger of an accident.◀Seite 138ControlsDriving comfort138
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The indicator lamps in the instrument cluster
light up and the mark in the speedometer is set
to the current speed.
Cruise control can be used.
Switching off Deactivated or interrupted system
If the system is deactivated or inter‐
rupted, actively intervene by braking, steering
and, if necessary, with evasive maneuvers; oth‐
erwise, there is the danger of an accident oc‐
curring.◀
If switching off the system while stationary,
press on the brake pedal at the same time.
Press the button on the steering
wheel.▷If active: press twice.▷If interrupted: press once.
The displays go out. The stored desired speed
and distance are deleted.
Interrupting Press the button on the steering
wheel.
If interrupting the system while stationary,
press on the brake pedal at the same time.
The system is automatically interrupted in the
following situations:
▷When the brakes are applied.▷When transmission position D is disen‐
gaged.▷When DTC Dynamic Traction Control is
activated or DSC is deactivated.▷When DSC is actively controlling stability.▷When SPORT+ is activated with Driving
Dynamics Control.▷If the safety belt and the driver's door are
opened when the vehicle is standing still.▷If the system has not detected objects for
an extended period, e.g., on a road withvery little traffic without road edge line
markings.▷If the detection range of the radar is dis‐
rupted, for example, by dirt or heavy fog.
Maintaining/storing the speed
Press the button.
Or:
Press the rocker switch while the system is in‐
terrupted.
When the system is switched on, the current
speed is maintained and stored as the desired
speed.
This is displayed in the speedometer and
briefly in the instrument cluster. Displays in the
instrument cluster, refer to page 142.
When cruise control is maintained or stored,
DSC Dynamic Stability Control is switched on,
if necessary.
Changing, maintaining, and storing
the speed
The rocker switch can be pressed while the
system is interrupted to maintain and store the
current speed. DSC Dynamic Stability Control
is switched on, if necessary.
Adapting the desired speed
Adapt the desired speed to the road con‐
ditions and be ready to brake at all times; oth‐
erwise, there is the danger of an accident oc‐
curring.◀
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Your vehicle accelerates automatically as
soon as the vehicle in the range of the ra‐
dar sensor moves off.▷Marking in the speedometer turns orange:
no automatic driving away.
To accelerate to the desired speed auto‐
matically, press the accelerator or press
the RES or SET button.
Rolling bars in the distance display indicate
that the vehicle in the radar sensor detection
range has moved off.
Your vehicle was braked to a halt by pressing
on the brake pedal and it is standing behind
another vehicle:
1. Press the button to call up a stored
desired speed.2.Release the brake pedal.3.Press on the accelerator briefly, or press
the RES rocker switch when the vehicle
ahead of you drives away.
Displays in the instrument cluster
Desired speed
▷The marking lights up green:
the system is active.▷The marking lights up or‐
ange: the system has been
interrupted.▷The marking does not light up: the system
is switched off.
Brief status display
Selected desired speed.
If --- appears briefly on the display for Check
Control messages, it is possible that the sys‐
tem requirements for operation are currently
not met.
Distance to vehicle ahead of you
The selected distance to the vehicle driving
ahead of you is shown.Distance displayDistance 1Distance 2Distance 3Distance 4
This value is set after the system is
switched on.The system has been interrupted or
distance control is deactivated be‐
cause the accelerator pedal is being
pressed; a vehicle was not detected.Distance control is deactivated be‐
cause the accelerator pedal is being
pressed; a vehicle was detected.Rolling bars: the detected vehicle has driven
away.
Indicator/warning lamps
Personal responsibility
The indicator and warning lamps do not
relieve the driver of the responsibility to adapt
his or her desired driving speed and style to
the traffic conditions.◀
The vehicle symbol lights up orange:
A vehicle has been detected ahead of
you.
The vehicle symbol flashes orange:
The conditions are not adequate for
operating the system.
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The system was deactivated but applies the
brakes until you actively resume control by
pressing on the brake pedal or accelerator
pedal.
The vehicle symbol flashes red and an
acoustic signal sounds:
You are requested to intervene by
braking or making an evasive maneuver.
Displays in the Head-up Display The information from Active Cruise Control
can also be displayed in the Head-up Display.
Adjusting the Head-up Display, refer to
page 97.
System limits
Speed range
Best results are achieved when using the sys‐
tem on well-developed roads and highways.
The system is functional at speeds beginning
at approx. 20 mph/30 km/h.
The maximum speed that can be set depends
on the vehicle.
The system can also be activated when sta‐
tionary.
Comply with the legal speed limit in every sit‐
uation when using the system.
Detection range
The detection capacity of the system and the
automatic braking capacity are limited.
Two-wheeled vehicles for instance might not
be detected.
Limited detection capacity
Because of the limits to the detection ca‐
pacity of the camera and the sensor, you
should be alert at all times so that you can in‐
tervene actively, if necessary; otherwise, there
is the danger of an accident occurring.◀
Deceleration
The system does not decelerate for:▷Pedestrians or similar slow-moving road
users.▷Red traffic lights.▷Cross traffic.▷Oncoming traffic.
Swerving vehicles
A vehicle driving in front of you is not detected
until it is completely within the same lane as
your vehicle.
Swerving vehicles
If a vehicle driving ahead of you suddenly
swerves into your lane, the system may not be
able to automatically restore the selected dis‐
tance. This also applies to major speed differ‐
ences to vehicles driving ahead of you, e.g.,
when rapidly approaching a truck. When a ve‐
hicle driving ahead of you is reliably detected,
the system requests that the driver intervene
by braking and carrying out evasive maneu‐
vers, if necessary. You must react yourself;
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otherwise, there is the danger of an accident
occurring.◀
Cornering
If the desired speed is too high for a curve, the
speed is reduced slightly in the curve, although
curves cannot be anticipated in advance.
Therefore, drive into a curve at an appropriate
speed.
In tight curves, situations may result due to the
restricted detection range of the system in
which a vehicle driving ahead of you may not
be detected at all, or not until after a consider‐
able delay.
When approaching a curve, the system may
react briefly to the vehicles in the next lane due
to the bend of the curve. Any deceleration of
the vehicle by the system can be compensated
for by briefly accelerating. After the accelerator
pedal is released, the system becomes active
again and independently controls the speed.
Driving away
In some situations, the vehicle cannot drive
away automatically, e.g., on steep inclines or
behind bumps in the road.
Radar sensor
For US owners only
The transmitter and receiver units comply with
part 15 of the FCC/Federal Communication
Commission regulations. Operation is gov‐
erned by the following:
FCC ID:▷OAYARS3-A
Compliance statement:
This device complies with part 15 of the FCC
Rules. Operation is subject to the following
two conditions:
▷This device may not cause harmful inter‐
ference, and▷this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modifications or changes to
these devices could void the user's authority to
operate this equipment.
Malfunction
The system cannot be activated if the radar sensor is not aligned correctly. This may be
caused by damage incurred during parking, for
example.
A Check Control message is displayed if the
system fails.
The function for detecting and responding
when approaching stationary vehicles may be limited in the following situations:
▷During calibration of the camera immedi‐
ately after vehicle shipment.▷If the camera is malfunctioning or dirty. A
Check Control message is displayed.Seite 144ControlsDriving comfort144
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Congestion Assistant
The concept In congestion situations, the system controls
the speed, steers independently as required
and keeps the vehicle close to the center of
the lane.
To the extent possible, the system automati‐
cally adjusts the speed to a slower vehicle
ahead of you. The distance that the vehicle
maintains to the vehicle ahead of you can be
varied. For safety reasons, it depends on the
speed. To maintain a certain distance, the sys‐
tem automatically reduces the speed, applies
the brakes lightly, or accelerates again if the
vehicle ahead begins moving faster.
When lane markings are detected, the system
keeps the vehicle in the center of the lane. For
this purpose, the system steers independently
as needed, for example, during cornering.
General information The congestion assistant determines speed
and distance from the vehicle in front and the
position of the lane markings via a radar sensor
and a camera.
Sensors on the steering wheel detect whether
the steering wheel is being touched.
The system is deactivated as soon as the
steering wheel is no longer being touched.
In order to be able to use the Congestion As‐
sistant, place your hands around the steering
wheel.
When driving with gloves or with protective
covers, contact with the steering wheel cannot
be detected by the sensors. The system in this
case cannot be used.
Hints Personal responsibility
Even an active system does not release
the driver from personal responsibility for the
driving process, especially for lane tracking,adaptation of speed, distance and driving style
to the traffic conditions.
Because of technical system limits, the system
cannot independently react appropriately in all
traffic situations.
Monitor the driving process, the surrounding
area and what is occurring in traffic continu‐
ously and attentively and actively intervene as
required, e.g., by braking, steering or making
an evasive maneuver.◀
Unfavorable weather conditions
In the event of unfavorable weather and
light conditions, e. g. if there is rain, snowfall,
slush, fog or glare, this may result in poorer
recognition of vehicles and lane limits as well
as short-term interruptions for vehicles that are
already detected. Drive attentively, and react to
the current traffic events. Intervene actively
when necessary, e.g., by braking, steering or
making an evasive maneuver, otherwise, there
is danger of an accident.◀
Functional requirements▷Drive on approved road type. The data on
this are stored in the navigation system.
Approved road types are highways.▷Sufficient lane width.▷Lane marking on both sides is detected.▷Vehicle driving ahead is detected.▷Speed below 25 mph/40 km/h.▷Both hands on the steering wheel rim.▷Sufficient curvature.▷Drive in the center of the lane.Seite 145Driving comfortControls145
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If active, the displayed speed is stored and the
vehicle reaches the stored speed if the road is
clear.▷Each time the rocker switch is pressed to
the point of resistance, the desired speed
increases or decreases by approx.
1 mph/1 km/h.▷Each time the rocker switch is pressed
past the point of resistance, the desired
speed increases or decreases by a maxi‐
mum of 5 mph/10 km/h.
The maximum speed that can be set de‐
pends on the vehicle.▷Pressing the rocker switch to the resist‐
ance point and holding it accelerates or de‐
celerates the vehicle without requiring
pressure on the accelerator pedal. After
the rocker switch is released, the vehicle
maintains its final speed. Pressing the
switch beyond the resistance point causes
the vehicle to accelerate more rapidly.
Resuming the desired speed
Press the button.
The stored speed is reached and maintained. Displays in the instrument cluster
Indicator lamp Depending on how the vehicle is equip‐
ped, the indicator lamp in the instru‐
ment cluster indicates whether the sys‐
tem is switched on.
Desired speed
▷The marking lights up green:
the system is active.▷The marking lights up or‐
ange: the system has been
interrupted.▷The marking does not light up: the system
is switched off.
Brief status display
Selected desired speed.
If --- appears briefly on the display for Check
Control messages, it is possible that the sys‐
tem requirements for operation are currently
not met.
PDC Park Distance Control
The concept PDC supports you when parking. Objects that
you are approaching slowly in front of or be‐
hind your vehicle are indicated by:
▷Signal tones.▷Visual display.
General information
Measurements are made by ultrasound sen‐
sors in the bumpers.
The range, depending on the environment, is
approx. 6 ft/2 m.
An acoustic warning is first given:
▷By the front sensors and the two rear cor‐
ner sensors at approx. 24 in/60 cm.▷By the rear middle sensors at approx.
5 ft/1.50 m.
To ensure full operability:
▷Do not cover sensors, e.g., by stickers, bi‐
cycle racks and the like.▷Keep the sensors clean and free of ice.▷When using high-pressure washers, do not
spray the sensors for long periods and
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HintsPersonal responsibility
Even an active system does not relieve
the driver from personal responsibility for the
driving process.
Because of technical system limits, the system
cannot independently react appropriately in all
traffic situations.
Continuously and attentively monitor the driv‐
ing process, the area surrounding the vehicle
and the traffic situation, and actively intervene
when required, otherwise, there is a risk of an
accident.◀
Avoid driving quickly with PDC
Avoid approaching an object quickly.
Avoid driving away quickly while PDC is not yet
active.
For technical reasons, the system may other‐
wise be too late in issuing a warning.◀
At a glance
Button in the vehicle
PDC Park Distance Control
Switching on/off
Switching on automatically PDC switches on automatically in the following
situations:
▷If the engine is running, select transmis‐
sion position R.▷If, with the appropriate equipment, obsta‐
cles are detected behind or in front of the
vehicle by PDC and the speed is slower
than approx. 2 mph/3 km/h.
Automatic activation when obstacles are de‐
tected can be switched off:
1."Settings"2."Parking"3.Select the setting.
The setting is stored for the remote control
currently in use.
Automatic deactivation during forward
travel
The system switches off when a certain driving
distance or speed is exceeded.
Switch the system back on if necessary.
Switching on/off manually Press the button.
▷On: the LED lights up.▷Off: the LED goes out.
In addition to the PDC Park Distance Control,
the rearview camera, refer to page 153, can be
switched on.
Switching on the rearview camera viathe iDrive
With PDC activated or Top View switched on:
"Rear view camera"
The rearview camera image is displayed. The
setting is stored for the remote control cur‐
rently in use.
Display
Signal tones When approaching an object, an intermittent
tone is sounded that indicates the position of
the object. For example, if an object is de‐
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