Swerving vehicles
A vehicle driving in front of you is not detected
until it is completely within the same lane as
your vehicle.
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 needed.
WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. Based on the limits of the sys‐
tem, it cannot independently react to all traffic
situations. There is risk of an accident. Adjust
the driving style to the traffic conditions. Watch
traffic closely and actively interfere in the re‐
spective situations.◀
Cornering
If the desired speed is too high for a curve, the
speed is reduced slightly, although curves can‐
not be anticipated in advance. Therefore, drive
into a curve at an appropriate speed.
In tight curves the system offers only restricted
detection where a vehicle ahead of you might
be detected late or not at all.
When you approach a curve the system may
briefly report vehicles in the next lane due to
the bend of the curve. If the system deceler‐
ates you may compensate it by briefly acceler‐
ating.
After releasing the gas pedal the system is re‐
activated and controls speed independently.
Driving away In some situations, the vehicle cannot drive off
automatically; for example:
▷On steep inclines.▷From behind bumps in the road.
In these cases, step on the accelerator pedal.
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Weather
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 recogni‐
tion of vehicles as well as short-term interrup‐
tions for vehicles that are already detected. Drive attentively, and react to the current trafficsituation. If necessary, intervene actively, e.g.
by braking, steering or evading.
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,
e.g.
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 delivery.▷If the camera is malfunctioning or dirty. A
Check Control message is displayed.
Cruise control
The concept The system maintains a preset speed via the
buttons on the steering wheel. The system
brakes on downhill gradients if engine braking
is insufficient.
General information
Depending on the driving settings, the features
of the cruise control can change in certain
areas.
The desired speed is also maintained downhill,
but may not be maintained on uphill grades if
engine power is insufficient.
Due to the driving style that minimizes fuel
consumption in ECO PRO drive mode, the ve‐
hicle may drop below the set desired speed in
some situations, e.g. on uphill grades.
Information WARNING
The use of the system can lead to an in‐
creased risk of accidents in the following situa‐
tions:
▷On winding roads.▷In heavy traffic.▷On slippery roads, in fog, snow or rain, or
on a loose road surface.
There is risk of accidents or risk of property
damage. Only use the system if driving at con‐
stant speed is possible.◀
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Overview
Buttons on the steering wheelPress but‐
tonFunctionCruise control on/off, refer to
page 176.Store/maintain speed, refer to
page 176.Pause cruise control, refer to
page 176.
Continue cruise control, refer to
page 177.Rocker switch:
Maintain, store, change speed,
refer to page 177.
Controls
Switching on Press button on the steering wheel.
The indicator lights in the instrument cluster
light up and the mark in the speedometer is set
to the current speed.
Cruise control is active.
DSC Dynamic Stability Control will be
switched on if needed.
Switch off WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. Based on the limits of the sys‐
tem, it cannot independently react to all traffic
situations. There is risk of an accident. Adjust
the driving style to the traffic conditions. Watch
traffic closely and actively interfere in the re‐
spective situations.◀
Press button on the steering wheel.
The displays go out. The stored desired speed
is deleted.
Interrupting When active, press the button.
The system is automatically interrupted in the
following situations:▷When the brakes are applied.▷If selector lever position D is disengaged.▷If DTC Dynamic Traction Control is acti‐
vated or DSC is deactivated.▷When DSC is actively controlling stability.
Maintaining, storing, and changing the
speed
Information WARNING
The desired speed can be incorrectly ad‐
justed or called up by mistake. There is risk of
an accident. Adjust the desired speed to the
traffic conditions. Watch traffic closely and ac‐
tively interfere in the respective situations.◀
Maintaining/storing the speed Press button.
Or:
Press the rocker switch while the system is in‐
terrupted.
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General information
The system determines the position of the
lane markings and the vehicle driving ahead
using five radar sensors and a camera.
Sensors on the steering wheel detect whether
the steering wheel is being touched.
In order to be able to use the system, place
your hands around the steering wheel.
The system is deactivated if the steering wheel
is no longer being touched.
Information WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. Based on the limits of the sys‐
tem, it cannot independently react to all traffic
situations. There is risk of an accident. Adjust
the driving style to the traffic conditions. Watch
traffic closely and actively interfere in the re‐
spective situations.◀
Overview
Button the steering wheelPress but‐
tonFunctionSwitch steering and lane guid‐
ance assistant including Traffic
Jam Assist on/off, refer to
page 179.
Radar sensors
The radar sensors are located in the bumpers.
Front center bumper
Front side bumper
Rear bumper
Always keep the bumper in the area of the ra‐
dar sensors clean and unobstructed.
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Camera
The camera is installed near the interior rear‐
view mirror.
Keep the windshield in the area behind the in‐
terior rearview mirror clean and clear.
Functional requirements
▷Speed below 130 mph/210 km/h.▷Sufficient lane width.▷Above approx. 43 mph, 70 km/h: lane
marking on both sides is detected.▷Below approx. 43 mph, 70 km/h: lane
marking on both sides or a vehicle driving
ahead is detected.▷At least one hand on the steering wheel
rim.▷Wide curves.▷Drive in the center of the lane.▷Turn signal not actuated.▷Camera calibration immediately after vehi‐
cle delivery is completed.
Switching on/off
Switching on Press button on the steering wheel.
Steering wheel symbol lights up gray.
System activates automatically as soon as all
function conditions are fulfilled, refer to
page 179.
Steering wheel symbol lights up green.
The system is active.
With the system switched on, pedestrian warn‐
ing and side collision warning are active. Set‐
tings on the Control Display remain un‐
changed.
Switch off Press button on the steering wheel.
The indicator goes out.
The system does not manipulate steering.
Automatic interruptionThe system is automatically interrupted in the
following situations:▷At a speed above 130 mph/210 km/h.▷When the steering wheel is released.▷When you manipulate steering.▷When you leave your own lane.▷When the turn signal is on.▷When the lane is too narrow.▷If for a particular time no lane marking is
detected and there is no vehicle driving in
front.
Steering wheel symbol lights up gray.
The system is paused and does not
manipulate steering.
If the system conditions are met, the system
reactivates automatically.
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Displays in the instrument clusterSymbolDescriptionSteering wheel symbol gray:
the system is on standby.Steering wheel symbol green:
system activated.Steering wheel symbol and
lane marking green: the system
assists the driver in keeping
the vehicle within the lane.Steering wheel symbol green,
lane marking gray: no lane
marking detected. The vehicle
follows the vehicle in front.Steering wheel symbol yellow:
hold steering wheel. The sys‐
tem is still active.Steering wheel symbol red and
a signal tone sounds: system
interrupted. It does not manip‐
ulate steering.
Displays in the Head-up Display
All system information can also be displayed in
the Head-up Display.
System limits
When driving with gloves or with protective
covers, contact with the steering wheel cannot
be detected by the sensors. In this case sys‐
tem cannot be used.
When driving within narrow lanes, the system
cannot be activated or meaningfully used.
Do not use the system, e.g.:
▷In construction zones.▷In rescue lanes.▷Within city limits.
Weather
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 recogni‐
tion of vehicles as well as short-term interrup‐
tions for vehicles that are already detected. Drive attentively, and react to the current trafficsituation. If necessary, intervene actively, e.g.
by braking, steering or evading.
PDC Park Distance Control The conceptPDC is a support when parking. Objects that
you are approaching slowly in front of or be‐
hind the vehicle are indicated with:
▷Signal tones.▷Visual display.
With parking assistant: obstacles on the side of
the vehicle that are detected by the sensors of
the parking assistant, can also be reported by
the PDC. Side protection, refer to page 183.
General information
Ultrasound sensors in the bumpers and possi‐
bly sideways on the vehicle measure the dis‐
tances from objects.
The maneuvering range, depending on the ob‐
stacle and environmental conditions, is approx.
6 ft/2 m.
An acoustic warning is first given with the fol‐
lowing circumstances:
▷By the front center sensors at ap‐
prox. 74 in/70 cm.▷By the rear middle sensors at approx.
5 ft/1.50 m.▷By the corner sensors at ap‐
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▷With parking assistant: by the side sensors
at approx. 24 in/60 cm.▷When a collision is imminent.
Information
WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. Based on the limits of the sys‐
tem, it cannot independently react to all traffic
situations. There is risk of an accident. Adjust
the driving style to the traffic conditions. Watch
traffic closely and actively interfere in the re‐
spective situations.◀
WARNING
Due to high speeds when PDC is acti‐
vated, the warning can be delayed due to
physical circumstances. There is risk of injuries
or risk of property damage. Avoid approaching
an object too fast. Avoid driving off fast while
PDC is not yet active.◀
Overview
Button in the vehicle
PDC Park Distance Control
Ultrasound sensors Ultrasound sensors of the PDC,e.g. in the bumpers.
Functional requirements
To ensure full functionality:▷Do not cover sensors, e.g., with stickers,
bicycle racks.▷Keep the sensors clean and free of ice.
To clean: when using high-pressure washers,
do not spray the sensors for long periods and
maintain a distance of at least 12 in/30 cm.
Switching on/off
Switching on automatically PDC switches on automatically in the following
situations:
▷If selector lever position R is engaged
when the engine is running.▷While approaching detected obstacles if
the speed is slower than approx.
2.5 mph/4 km/h. The activation distance
depends on the situation in question.
You may switch on and off automatic activation
when obstacles are detected.
About iDrive:
1."My Vehicle"2."Vehicle settings"3."Parking"4."Automatic PDC activation": only with re‐
spective equipment.5."Automatic PDC activation"
The setting is stored for the drive profile cur‐
rently used.
Depending on equipment, an appropriate cam‐
era view is also switched on.
Automatic deactivation during forward
travel
The system switches off when a certain driving
distance or speed is exceeded.
Switch the system back on if needed.
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Switching on/off manuallyPress button.▷On: the LED lights up.▷Off: the LED goes out.
The rearview camera image is displayed when
the reverse gear is engaged by pressing the
button.
Display
Signal tones When approaching an object, an intermittent
sound indicates the position of the object. E. g.
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, 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 there are objects in front of and behind the
vehicle at the same time, with a distance
smaller than approx. 10 in/25 cm, an alternat‐
ing constant tone will sound.
The interval tone and constant tone are
switched off if the selector lever position P is
engaged.
The interval tone is switched off after a short
time when the vehicle is stationary.
Volume
The ratio of the PDC signal tone volume to the
entertainment volume can be adjusted.
About iDrive:
1."My Vehicle"2."System settings"3."Tone"4."Volume settings"5."PDC"6.Set the desired value.
The setting is stored for the drive profile cur‐
rently used.
Visual warning
The approach of the vehicle to an object is
shown on the Control Display. Objects that are
farther away are already displayed on the Con‐
trol Display before a signal sounds.
The display appears as soon as PDC is acti‐
vated.
The range of the sensors is represented in the
colors green, yellow and red.
Pathway lines are faded in for better estimation
of the required space.
When the image of the rearview camera is dis‐
played, the switch can be made to PDC or to a
different view with obstacle markings as
needed:
"Rear view camera"
Cross traffic warning, refer to page 197: de‐
pending on the equipment, it is warned in the
PDC display against vehicles approaching in
the front or rear from the side.
With parking assistant: emergency
braking function, Active PDC
The concept The emergency braking function of PDC ini‐
tiates an emergency braking in case of acute
risk of collision. Due to system limits, a colli‐
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