A target speed within the same range can be
specified using the lever of the cruise control.
On
inclines over 10 %, you can reduce the speed
to approx. 3 mph/4 km/h. Pull the lever of the
cruise control beyond the resistance point, ar‐
row 3. 1
Increasing speed
2 Pull to the resistance point: reduce the
speed to approx. 4 mph/6 km/h
3 Pull beyond the resistance point: on inclines
over 10 %, reduce the speed to ap‐
prox. 3 mph/4 km/h
Activating HDC Press the button; the LED above the button
lights up.
The LED flashes when the brakes are applied
automatically.
Deactivating HDC
Press the button again; the LED goes out. HDC
is automatically deactivated above approx.
37 mph/60 km/h. Displays* in the instrument cluster
1
Display for target speed
2 HDC display
Malfunction
HDC is temporarily unavailable in the following
situations due to a high brake temperature:
▷ The LED in the button and the display HDC
go out during HDC operation.
▷ The LED in the button and the HDC display
do not light up when the button is pressed.
Malfunction of driving
stability control systems Adapting your driving style
When driving on poor roads, avoid using
full throttle or pressing the accelerator beyond
the kickdown point and also avoid heavy brak‐
ing. Otherwise, the drive train may be damaged
or accidents can occur.◀
Adaptive Drive*
The concept
Adaptive Drive reduces the body roll which oc‐
curs when cornering quickly or during fast eva‐
sive maneuvers. In addition, Adaptive Drive re‐
duces
the steering angle requirement, improves
the running comfort, and enhances the dynamic
driving characteristics of your vehicle. Seite 99
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Controls At a glance
by the driver and thus stabilize the vehicle before
the driver intervenes.
Malfunction
The
warning lamp lights up yellow and
a message is shown on the Control
Display. The active steering is defec‐
tive or has been temporarily deacti‐
vated. At low speeds, greater steering wheel
movements are required, whereas at higher
speeds, the vehicle reacts more sensitively to
steering wheel movements. The stability-pro‐
moting intervention can also be deactivated.
Proceed cautiously and drive defensively.
Deactivation
Active steering deactivates in order to carry out
an initialization. This deactivation is displayed by
means of a message. The initialization can take
several minutes.
If the message does not disappear during the
current trip, have the system checked.
Defect
In the event of a defect, a corresponding text
message is displayed. Have the system
checked. Seite 101
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Controls At a glance
Driving comfort
Active cruise control*
With active cruise control you can select a de‐
sired speed which is then automatically main‐
tained when driving on open roadways and is
varied
to maintain a selected distance setting to
slower moving vehicles ahead.
Active cruise control represents a technological
advance over the familiar cruise control and is a
welcome relief from the constant adjustment of
speed that can accompany driving in traffic on
highways or other high-speed thoroughfares.
Especially on longer trips and in traffic conges‐
tion, the system can reduce fatigue and tension,
while increasing your enjoyment of driving.
Please use it safely and responsibly.
In addition to holding a steady cruising speed, if
you encounter slower vehicles ahead, active
cruise control will, within limits, adjust your ve‐
hicle's speed automatically so that you can flow
with the traffic without having to make constant
adjustments. If, for example, while cruising at the
selected speed, you begin to approach a slower
vehicle ahead of you in the same lane, the sys‐
tem will reduce your vehicle's speed to the same
as that of the vehicle ahead to maintain your se‐
lected distance setting. You can vary the follow‐
ing distance, which will vary with speed. Based
on your selected distance setting, the system
automatically decreases the throttle setting and
lightly applies the brakes if necessary. In addi‐
tion, if the vehicle ahead of you slows to a com‐
plete stop, the system can follow this action
within the given scope and can also accelerate
from a complete stop if the vehicle ahead of you
drives off again shortly thereafter. During brak‐
ing, your vehicle brake lamps will automatically
illuminate to alert a following driver to take ac‐
tion. In addition, it may be necessary for your
vehicle to downshift the automatic transmission
to maintain the distance setting selected. As
soon as the road in front of you has no moving
vehicles, the system will accelerate to your de‐
sired speed. This set speed is also maintained
on downhill grades, however the vehicle speed can drop below the set speed when driving uphill
if the engine output is not sufficient.
Personal responsibility
Active cruise control cannot detect stop
signs,
red lights, or any object that is stopped or
is blocking the road. Active cruise control is not
and must not be used as a collision avoidance/
warning system. Since this active cruise control
system is a new technology and operates dif‐
ferently from conventional cruise control sys‐
tems to which you may be accustomed, it is
necessary that you read all of the pages relating
to this system before use. Carefully read and
observe the information on the system limita‐
tions, refer to page 106, to obtain a good com‐
mand of the system and its range of applica‐
tions.◀
Brake pedal feel
When the system brakes and you also depress
the brake pedal, a somewhat different braking
feel results.
Professional navigation system*
If the vehicle is equipped with a Professional
navigation system, the system adapts the ac‐
celeration and deceleration behavior of the ve‐
hicle to the road on which you are currently driv‐
ing.
To ensure that the system has the latest infor‐
mation on the course of the road, use the most
recent version of the navigation data.
If the vehicle position is unknown, e.g., if you
have left the region covered by the map, the
navigation system ceases to influence vehicle
behavior.
Applications
Please try the system first during sparse traffic
and clear road conditions so that you can get
used to the system. After you have experience
and understand the system, only then use it dur‐
ing normal traffic. Seite 102
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Driving comfort
As with conventional cruise control systems, ac‐
tive cruise control in no way reduces or substi‐
tutes for the driver's own personal experience,
responsibility, alertness and awareness in ad‐
justing speed, braking or otherwise controlling
the vehicle. The driver should decide when to
use the system on the basis of road, traffic, vis‐
ibility, and weather conditions. Active cruise
control is intended for use on highway-type
roadways where traffic is moving relatively
smoothly as well as in slow-moving traffic con‐
gestion.
Do not use the system in city driving; in
complex driving situations; heavy traffic such as
during rush hour; on curvy, winding roads, slip‐
pery roads or roads with sharp curves such as
highway off-ramps; during inclement weather
such as snow, strong rain or fog; or when enter‐
ing interchanges, service/parking areas or toll
booths. It is also important to regulate your ve‐
hicle's speed and distance setting within appli‐
cable legal limits. Always be ready to take action
or apply the brakes if necessary, especially when
the system is actively following a vehicle in front
of you. Otherwise, driving conditions can result
which lead to a violation of the law or elevated
risk of an accident.
The minimum initial activation speed is
20 mph/ 30 km/h, and the maximum speed is
110 mph/ 180 km/h. The system can also be ac‐
tivated while the vehicle is stationary, refer to
page 105.
One lever for all functions 1
Storing and increasing the desired
speed 103
2 Storing and reducing the desired
speed 103 3
Interrupting 104 or deactivating 105 the
system
4 Retrieving the stored desired speed and dis‐
tance 104 or driving away 105
5 Selecting the distance to the vehicle
ahead 104
Storing the current speed
Push
the lever, arrow 1, or pull it briefly, arrow 2. The system stores the current vehicle speed. It
is indicated on the speedometer and briefly in
the instrument panel.
Increasing desired speed
Press or briefly push the lever up to or beyond
the resistance point, arrow 1, until the desired
speed is displayed.
The displayed speed is stored and the vehicle
reaches the stored speed if the road is clear.
▷
With each activation to the resistance point,
the desired speed increases by approx.
1 mph/1 km/h.
▷ With each activation beyond the resistance
point,
the desired speed increases by a max‐
imum of 5 mph/10 km/h.
Reducing the desired speed
Pull
the lever, arrow 2, until the desired speed is
displayed.
The functions are the same as those when in‐
creasing the desired speed.
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Controls At a glance
While standing
Before leaving the vehicle
Before
leaving the vehicle with the engine
running, engage position P of the automatic
transmission and apply the parking brake. Oth‐
erwise, the vehicle may begin to roll.◀
If a vehicle detected ahead of you slows to a halt
and your vehicle is also brought to a halt by the
system:
▷ If the vehicle ahead of you drives away, your
vehicle
accelerates automatically as long as
mark 1 for the desired speed in the speed‐
ometer is green.
▷ If the vehicle ahead of you drives away when
mark 1 is orange, depress the accelerator
briefly or press button 4.Rolling bars in the
distance indicator 3 mean that the vehicle
ahead of you has driven away.
If you are standing behind a vehicle with your
brake
pedal depressed and the system is deac‐
tivated or interrupted:
1. Select the desired speed using the lever, ar‐
row
1 or arrow 2, or press button 4 to retrieve
a stored speed.
2. Release the brake pedal.
3. When the vehicle ahead of you drives away,
press
on the accelerator briefly or press but‐
ton 4.
Deactivating the system
▷ When driving, press the lever up or down
twice.
▷ When stationary, do the same while de‐
pressing the brake pedal.
▷ Switch off the ignition.
The displays go out, and the stored desired
speed and distance are deleted. Displays in instrument cluster
1
Stored desired speed
▷Green: the system is active.
▷ Orange: the system is interrupted.
2 Lights up yellow: vehicle detected ahead
Display also used for warnings, please read
all information on warnings.
3 Selected distance to vehicle ahead The in‐
dicator lights up as soon as the system is
activated.
The indicator lights up as soon as the sys‐
tem is activated.
The bars roll: the vehicle in front of you has
driven off
4 Brief display of stored desired speed
If the display --- mph/---km/h appears briefly,
the conditions necessary for operation may cur‐
rently not be met.
Warning lamps
Display 2 flashes red and a signal
sounds.
The system requests that the you
intervene by braking and carrying
out evasive maneuvers, if neces‐
sary. The system cannot independently restore
the distance to the vehicle ahead.
This display does not relieve the driver of the
responsibility to adapt his or her desired driving
speed and style to the traffic conditions.
Display 2 flashes yellow.
The conditions necessary for oper‐
ation of the system are no longer
met, e.g., due to ABS or DSC inter‐ Seite 105
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Controls At a glance
▷
Pedestrians or similarly slow road users.
▷ Red traffic lights.
▷ Stationary objects.
▷ Cross traffic.
▷ Approaching traffic.
No warnings
A warning may not be issued when ap‐
proaching a stationary or very slow-moving ob‐
stacle. Take action yourself, otherwise there is
a risk of an accident.◀
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 vehi‐
cle driving ahead of you is reliably detected, the
system requests that the driver intervene by
braking and carrying out evasive maneuvers, if
necessary. Take action yourself, otherwise
there is a risk of an accident.◀ Unexpected lane change
If a vehicle ahead of you unexpectedly moves
into
another lane from behind a stopped vehicle,
you yourself must react, as the system does not
react to stopped vehicles.
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. There‐
fore, 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 considerable
delay. When approaching a curve, the system may re‐
act
briefly to the vehicles in the next lane due to
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Controls At a glance
Maintaining current speed
Push, arrow 1, or pull, arrow 2, the lever to the
resistance point.
The car's current speed is stored and main‐
tained. It is displayed on the speedometer and
briefly in the instrument cluster.
On uphill gradients, it may prove impossible to
maintain the set speed if current engine power
output
is insufficient. If the engine braking effect
is insufficient on downhill slopes, the system will
brake the vehicle slightly.
Increasing desired speed
Repeatedly press the lever to the resistance
point or beyond, arrow 1, until the desired speed
is reached.
▷ Each time the lever is pressed to the point of
resistance, the desired speed increases by
approx. 1 mph/1 km/h.
▷ Each time the lever is pressed beyond the
resistance point, the desired speed is in‐
creased by up to 5 mph/10 km/h.
The system stores and maintains the speed.
Accelerating using the lever
Accelerating slightly:
Press the lever to the resistance point, arrow 1,
until the desired speed is reached.
Accelerating significantly:
Press
the lever beyond the resistance point, ar‐
row 1, until the desired speed is reached.
The vehicle accelerates without pressure on the
accelerator pedal. The system stores and main‐
tains the speed.
Decreasing speed
Repeatedly pull the lever to the resistance point
or beyond, arrow 2, until the desired speed is
displayed.
▷ Each time the lever is pulled to the resist‐
ance point, the desired speed is decreased
by approx. 1 mph/1 km/h.
▷ Each time the lever is pulled beyond the re‐
sistance
point, the desired speed is reduced by up to 5 mph/10 km/h until the minimum
speed of 20 mph/30 km/h is achieved.
The system stores and maintains the speed.
Interrupting the system
Press
the lever up or down, arrow 3: display 1 in
the speedometer changes color, refer to
page 109.
In addition, the system is interrupted:
▷ When the brakes are applied.
▷ When the transmission position D is disen‐
gaged.
▷ When DTC is activated or DSC is deacti‐
vated.
▷ When DSC or ABS is intervening.
Warning lamp The warning lamp lights up if cruise
control has been deactivated auto‐
matically, e.g., by a control interven‐
tion
of the DSC. A message appears on the Con‐
trol Display.
Resuming cruising speed
Press button 4:
The stored speed is resumed and maintained.
Deactivating the system
▷ Press the lever upward or downward twice,
arrow 3.
▷ Switch off the ignition.
The stored speed is cleared.
Displays in the instrument cluster 1
Stored desired speed Seite 109
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Controls At a glance
Switching on automatically
With
the engine running or the ignition switched
on, shift the selector lever into position R.
Switching off automatically
The system switches off and the LED goes out:
▷ After approx. 165 ft/50 m when driving for‐
ward.
▷ After approx. 22 mph/35 km/h when driving
forward.
Switch on the system again if necessary.
Switching on/off manually Press the button.
▷
On: the LED lights up.
▷ Off: the LED goes out.
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. 12 in/30 cm, a continuous tone is
sounded.
If objects are located both in front of and behind
the vehicle, an alternating continuous signal is
sounded.
The intermittent tone is interrupted after approx.
3 seconds: ▷
If the vehicle stops in front of an object that
is detected by only one of the corner sen‐
sors.
▷ If moving parallel to a wall.
The signal tone is switched off:
▷ When the vehicle moves away from an ob‐
ject by more than approx. 4 in/10 cm.
▷ When transmission position P is engaged.
Volume
You can set the volume of the PDC signal tone,
refer to page 173.
The
setting is stored for the remote control cur‐
rently in use.
Visual warning
The approach to an object can be shown on the
Control Display. Objects that are farther away
are displayed on the Control Display before a
signal tone sounds. The display appears as soon as PDC is acti‐
vated.
If
the last image selected was the rear view cam‐
era, this is displayed again. To switch to PDC: "Switch off rear view camera"
The
setting is stored for the remote control cur‐
rently in use.
Image on the Control Display
Switching on the rear view camera
using iDrive
With PDC activated: "Rear view camera"
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Controls At a glance