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
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
Selecting the distance
▷
Press the rocker down briefly:
Increase the distance.
▷ Press the rocker up briefly:
Decrease the distance.
The selected distance is displayed in the instru‐
ment panel.
Distance display Distance 1, closest
Distance 2
Distance 3
Distance 4, furthest
This
distance is set when you ac‐
tivate the system. Selecting an appropriate distance
Use good judgement to select the appro‐
priate following distance given road conditions,
traffic,
applicable laws and State driving recom‐
mendations for safe following distance. Other‐
wise, a violation of the law or risk of an accident
could result.◀ Interrupting the system
Press the lever up or down and additionally de‐
press the brake if the vehicle is stationary. The
mark
in the speedometer changes color and the
distance indicator goes out.
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 is activated
▷ When the safety belt and the driver's door
are opened while the vehicle is stationary.
▷ When the system has not detected objects
for an extended period, e.g., on a road with
very
little traffic without road edge line mark‐
ings.
▷ The radar sensor is dirty.
Active intervention if the system is inter‐
rupted
If
the system is interrupted, actively intervene by
braking and, if necessary, with evasive maneu‐
vers; otherwise, there is the danger of an acci‐
dent occurring.◀
Calling up the stored desired speed and
distance
While driving
Press button 4, refer to page 103. All of the dis‐
plays in the instrument panel lights up. Seite 104
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Driving comfort
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
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, with
a heavy trailer or behind bumps in the road.
Driver interventions and your
responsibility
Your
actions have priority at all times. When you
press on the accelerator pedal while driving, au‐
tomatic braking is not performed and the bars in
the distance display go out until you lift your foot
from the accelerator pedal. Once you release the
accelerator pedal, the desired speed is achieved
again on clear roads or the selected distance to
the vehicle ahead is maintained.
Making braking possible
Anytime the driver presses down on the
accelerator pedal, any braking action by the sys‐
tem is interrupted and the distance indicator
goes out until the pedal is fully released. As soon
as you fully release the accelerator, the system
will again control your cruising speed and dis‐
tance setting. While driving with the system ac‐
tivated, resting your foot on the acelerator pedal
will cause the system not to brake even if nec‐
essary. Be certain that floormats or other ob‐
jects on the vehicle floor do not interfere with
movement of the acccelerator pedal.◀
Limits of automatic braking
While active cruise control is capable of
braking your vehicle automatically when you ap‐
proach a slower vehicle ahead, it is important to
be aware that the ability of the system to apply
the brakes is also limited, e.g. when you reduce
your desired speed sharply. lt uses only a portion
of braking system capacity and does not utilize
the full capacity of the vehicle braking system.
Therefore, the system cannot decrease your
speed for large differences in speed between
your vehicle and the vehicle ahead. Examples: when you approach a vehicle traveling at a much
lower speed than your own speed such as ap‐
proaching a toll booth or when a much slower
vehicle cuts in front of you at close range.◀
Cruise control*
The concept
The
system is functional at speeds beginning at
approx. 20 mph/30 km/h.
The speed specified using the lever on the
steering column is maintained.
The system brakes on downhill gradients if en‐
gine braking action is insufficient.
Do not use cruise control
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.◀
One lever for all functions 1
Storing and maintaining speed or accelerat‐
ing
2 Storing and maintaining speed or deceler‐
ating
3 Interrupting and deactivating the system
4 Resuming a speed stored beforehand Seite 108
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Driving comfort
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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Reference Mobility Communication Entertainment Navigation Driving tips
Controls At a glance
▷
Green: the system is active.
▷ Orange: the system is interrupted.
2 Selected desired speed appears briefly
If the display --- mph or --- km/h appears briefly,
conditions may not be adequate to operate the
system.
Call up Check Control messages, refer to
page 77.
Malfunction The
warning lamp comes on when the
system has failed.
A message appears on the Control
Display. More information, refer to page 76.
Park Distance Control PDC*
The concept
In addition to the PDC Park Distance Control, the
backup camera*, refer to page 112, can be
switched on.
PDC supports you when parking. A slow ap‐
proach to an object in front of or behind your ve‐
hicle is announced by:
▷ Signal tones.
▷ Visual display.
Measurement
Measurements
are made by ultrasound sensors
in the bumpers.
The range is approx. 6 ft/2 m.
An acoustic warning is first given:
▷ By the front* sensors and two rear corner
sensors at approx. 24 in/60 cm.
▷ By the rear middle sensors at approx. 5 ft/
1.50 m.
System limits Check the traffic situation as well
PDC cannot serve as a substitute for the
driver's personal judgment of the traffic situa‐
tion.
Check the traffic situation around the vehi‐ cle with your own eyes. Otherwise, an accident
could result from road users or objects located
outside of the PDC detection range.
Loud
noises from outside and inside the vehicle
may prevent you from hearing the PDC's signal
tone.◀
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.◀
Limits of ultrasonic measurement
The detection of objects can reach the physical
limits of ultrasonic measurement, for instance:
▷ With tow bars and trailer hitches.
▷ With thin or wedge-shaped objects.
▷ With low objects.
▷ With objects with corners and sharp edges.
Low objects already displayed, e.g., curbs, can
move
into the blind area of the sensors before or
after a continuous tone sounds.
High, protruding objects such as ledges may not
be detected.
False warnings
PDC may issue a warning under the following
conditions even though there is no obstacle
within the detection range:
▷ In heavy rain.
▷ When sensors are very dirty or covered in
ice.
▷ When sensors are covered in snow.
▷ On rough road surfaces.
▷ In large buildings with right angles and
smooth
walls, e.g., in underground garages.
▷ In heavy exhaust.
▷ Due to other ultrasound sources, e.g.,
sweeping machines, high pressure steam
cleaners or neon lights. Seite 110
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Driving comfort
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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Reference Mobility Communication Entertainment Navigation Driving tips
Controls At a glance