Driving comfortVehicle equipment
All standard, country-specific and optional
equipment that is offered in the model series is
described in this chapter. Therefore, equipment
is also described that is not available in a vehi‐
cle, e. g., because of the selected optional
equipment or country variant. This also applies
for safety-related functions and systems.
Camera-based cruise con‐
trol, ACC
The concept
This 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.
A camera on the interior rear view mirror is
used to detect vehicles driving ahead.
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 decelerates, applies the brakes
lightly, or accelerates again if the vehicle ahead
begins moving faster.
As soon as the road is clear, it accelerates to the
desired speed.
The speed is also maintained on downhill gradi‐
ents, but may not be maintained on uphill
slopes if engine power is insufficient.
General information
Depending on the set drive mode, refer to
page 108, the characteristics of the cruise con‐
trol 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, for instance if there is rain,
snowfall, slush, fog or glare, this may result in
poorer recognition of traffic situations 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. ◀
At a glance
Buttons on the steering wheelPress the but‐
tonFunctionCruise control on/off, interrupt‐
ing, refer to page 111Store/maintain speed, refer to
page 112Resume speed, refer to
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Press the but‐
tonFunctionReduce distance, refer to
page 112Increase distance, refer to
page 112Maintain or save speed, refer to
page 112
Increase maintain or save speed,
refer to page 112Maintain or save speed, refer to
page 112
Reduce, maintain or store speed,
refer to page 112
The arrangement of the buttons varies accord‐
ing to the how the vehicle is equipped or coun‐
try-specific variants.
Camera
The camera is located near the base of the mir‐
ror.
Keep the windshield in the area behind the in‐
terior rearview mirror clean and clear.
Switching on/off and interrupting cruise
control
Switching on Press the button on the steering
wheel.
Display in the instrument cluster lights
up.
Display in the instrument cluster lights up. The current speed is adopted as the
desired speed and displayed on the
symbol.
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. ◀
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.
The system is automatically interrupted if:
▷The brakes are applied.▷The clutch pedal is depressed for a few sec‐
onds or released while a gear is not en‐
gaged.▷Selector lever position N is engaged.▷DTC Dynamic Traction Control is activated
or DSC is deactivated.▷DSC is actively controlling stability.▷The detection range of the camera is dis‐
torted, for example, by soiling, heavy pre‐
cipitation or glare from the sun.▷The vehicle in front decelerates below a
speed of approx. 20 mph/30 km/h.Seite 111Driving comfortCONTROLS111
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In the following cases, the stored speed value is
deleted and cannot be called up again:▷When the system is switched off.▷When the ignition is switched off.
Changing between cruise control with/
without distance control
Traffic driving ahead
The cruise control does not react to traffic
driving ahead of you, but instead maintains the
stored speed. Take this factor into account – you yourself must react; otherwise, there is the
danger of an accident occurring. ◀
To switch over to cruise control: Press and hold the button, or
Press and hold the button.
The indicator lamp in the instrument
cluster comes on and check-control
message is displayed as soon as the
switch is made to cruise control.
To switch back to the camera-based cruise con‐
trol, press one of the buttons.
Displays in the instrument cluster
Desired speed In addition to the indicator lamp, the
desired speed is displayed in the info
display.
▷The indicator lights up green: the system is
active.▷The indicator lights up orange: the system
has been interrupted.▷No display: 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 system
requirements for operation are currently not
met.
Distance to vehicle ahead of you
Selected distance from the vehicle driving
ahead is briefly displayed in the left hand por‐
tion of the info display.Distance displayDistance 1Distance 2Distance 3Distance 4
This value is set after the system is
switched on.
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 op‐
erating the system.
The system was deactivated but applies the
brakes until you actively resume control by
pressing on the brake pedal or accelerator
pedal.
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The vehicle symbol flashes red and an
acoustic signal sounds:
You are requested to intervene by brak‐
ing or making an evasive maneuver.
The system has been interrupted or dis‐
tance control is deactivated because
the accelerator pedal is being pressed;
a vehicle was not detected.
Distance control is deactivated because
the accelerator pedal is being pressed;
a vehicle was detected.
Changing between cruise control with/
without distance control
Display in the instrument cluster:
Cruise Control without distance control.
Camera-based cruise control with dis‐
tance control.
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 83.
System limits
Speed range The optimum area of use is on well constructed
roads. The system is functional at speeds be‐
ginning at approx. 20 mph/30 km/h.
The max. speed that can be set is
85 mph/140 km/h.
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, you should be alert at all
times so that you can intervene actively, if nec‐
essary; otherwise, there is the danger of an ac‐
cident occurring. ◀
Deceleration The system does not decelerate for:
▷Pedestrians, cyclists or similar slow road
users.▷Red traffic lights.▷Cross traffic.▷Oncoming traffic.▷Unlit vehicles or vehicles with defective
lighting at night.Seite 114CONTROLSDriving comfort114
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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; oth‐
erwise, there is the danger of an accident oc‐
curring. ◀
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 considera‐
ble delay.
When approaching a curve, the system may re‐
act 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.
Malfunction A Check Control message is displayed if the sys‐
tem fails or was automatically deactivated.
The system may not be fully functional in the
following situations:
▷If an object was not correctly detected.▷In heavy fog, rain, sprayed water or snow‐
fall.▷In tight curves.▷If the camera view field or the front wind‐
shield are dirty or covered.▷When driving toward bright lights.▷Up to 20 seconds after the start of the en‐
gine, via the Start/Stop knob.▷During calibration of the camera immedi‐
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Cruise controlThe concept
The system is functional at speeds beginning at
approx. 20 mph/30 km/h.
It maintains the speed that was set using the
control elements on the steering wheel.
The system brakes on downhill gradients if en‐
gine braking action is insufficient.
Unfavorable conditions
Do not use the system if unfavorable con‐
ditions make it impossible to drive at a constant
speed, for instance:▷On curvy roads.▷In heavy traffic.▷On slippery roads, in fog, snow or rain, or
on a loose road surface.
Otherwise, you could lose control of the vehicle
and cause an accident. ◀
General information
Depending on the set drive mode, refer to
page 108, the characteristics of the cruise con‐
trol can change in certain areas.
Controls
At a glance
Press the buttonFunctionSystem on/off, interruptStore speedResume speedIncreasing, maintaining or
storing the speedReducing, maintaining or stor‐
ing the speedSwitching on
Press the button on the steering
wheel.
The indicator lamp in the instrument
cluster lights up.
The current speed is adopted as the de‐
sired speed and is displayed with the
symbol in the instrument cluster.
Cruise control can be used.
Switching off Deactivated or interrupted system
If the system is deactivated or inter‐
rupted, actively intervene by braking and, if
necessary, with evasive maneuvers; otherwise,
there is the danger of an accident occurring. ◀
Press the button.▷If active: press twice.▷If interrupted: press once.
The displays go out. The stored desired speed is
deleted.
Interrupting When active, press the button.
The system is automatically interrupted if:
▷The brakes are applied.▷The clutch pedal is depressed for a few sec‐
onds or released while a gear is not en‐
gaged.▷The gear engaged is too high for the cur‐
rent speed.▷Selector lever position N is engaged.▷DTC Dynamic Traction Control is activated
or DSC is deactivated.▷DSC is actively controlling stability.Seite 116CONTROLSDriving comfort116
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Maintaining/storing the current speedPress the button.
Or
or button: press 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 instrument cluster.
When cruise control is maintained or stored,
DSC Dynamic Stability Control is switched on, if
necessary.
Changing/maintaining speed
or button: can be pressed while the sys‐
tem is interrupted in order to maintain and
store the current speed.
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. ◀
or button: press repeatedly until the de‐
sired speed is set.
If active, the displayed speed is stored and the
vehicle reaches the stored speed if the road is
clear.
▷ or button: each time it is pressed to
the point of resistance, the desired speed
increases or decreases by approx.
1 mph/1 km/h.▷ or button: each time it 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.▷ or button: pressing it to the resist‐
ance point and holding it there accelerates
or decelerates the vehicle without requiringpressure on the accelerator pedal. After the
button is released, the vehicle maintains its
final speed. Pressing the switch beyond the
resistance point causes the vehicle to accel‐
erate 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 desired speed is displayed together
with the symbol.
▷The indicator lights up green: the
system is active.▷The indicator lights up orange: the system
has been interrupted.▷No display: 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 system
requirements for operation are currently not met.
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Switching on/off manuallyPress the button.▷On: the LED lights up.▷Off: the LED goes out.
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 detected
to the left rear of the vehicle, a signal tone
sounds from the left rear speaker.
The shorter the distance to the object becomes,
the shorter the intervals.
If the distance to a detected object is less than
approx. 10 in/25 cm, a continuous tone is
sounded.
If objects are located both in front of and be‐
hind the vehicle, an alternating continuous sig‐
nal is sounded.
The signal tone is switched off:
▷When the vehicle moves away from an ob‐
ject by more than approx. 4 in/10 cm.▷When selector lever position P is engaged.
Volume
The volume of the PDC signal can be adjusted,
refer to user's manual for Navigation, Enter‐
tainment and Communication.
The setting is stored for the remote control cur‐
rently in use.
Visual warning The approach of the vehicle to an object can be
shown on the Control Display. Objects that are
farther away are displayed on the Control Dis‐
play before a signal tone sounds.
A display appears as soon as Park Distance
Control (PDC) is activated.
The range of the sensors is represented in col‐
ors: red, green and yellow.
When the image of the rearview camera is dis‐
played, the switch can be made to PDC:
"Rear view camera"
System limits
Limits of ultrasonic measurement The detection of objects can reach the physical
limits of ultrasonic measurement, e.g., in the
following circumstances:
▷For small children and animals.▷For persons with certain clothing, e.g.
coats.▷If there is an external disturbance of the ul‐
trasound, e.g. from passing vehicles or loud
machines.▷When sensors are dirty, iced over, damaged
or out of position.▷Under certain weather conditions, such as
high relative humidity, rain, snowfall ex‐
treme heat or strong wind.▷With tow bars and trailer hitches of other
vehicles.▷With thin or wedge-shaped objects.▷With moving objects.▷With elevated, protruding objects such as
ledges or cargo.▷With objects with corners and sharp edges.▷With objects with a fine surface structure,
such as fences.▷For objects with porous surfaces.
Low objects already displayed, e.g., curbs, can
move into the blind area of the sensors before
or after a continuous tone sounds.
False warnings
PDC may issue a warning under the following
conditions even though there is no obstacle
within the detection range:
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