Driver assistance systemsVehicle features and options
This chapter describes all standard, country-
specific and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to safety-related functions and
systems. The respectively applicable country
provisions must be observed when using the
respective features and systems.
Active Cruise Control with Stop & Go function, ACC
The concept
Use this system to select a desired speed that
the vehicle will maintain automatically 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, and
then proceeds to drive again within a brief pe‐
riod, the system is able to detect this within the
given system limits. Your own vehicle will
brake automatically and then accelerate again.
If the vehicle ahead of you drives away again
after a prolonged period, briefly press the ac‐
celerator pedal or press the appropriate button
to reactivate the system. The vehicle will auto‐
matically accelerate.As soon as the road is clear, the vehicle accel‐
erates to the desired speed.
Vehicles driving ahead are captured by a radar
sensor and a camera.
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 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
An unsecured vehicle can put itself into
motion and roll away. There is risk of an acci‐
dent. Before exiting, secure the vehicle against
rolling.
In order to ensure that the vehicle is secured
against rolling away, observe the following:▷Set the parking brake.▷On uphill grades or on a slope, turn the
front wheels in the direction of the curb.▷On uphill grades or on a slope, also secure
the vehicle, e.g. with a wheel chock.◀Seite 168ControlsDriver assistance systems168
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Overview
Buttons on the steering wheelPress
buttonFunctionCruise control on/off, refer to
page 169.Store/maintain speed, refer to
page 170.Pause cruise control, refer to
page 170.
Continue cruise control with the
last setting, refer to page 171.Without steering and lane guid‐
ance assistant:
Increase distance, refer to
page 171.Without steering and lane guid‐
ance assistant:
Reduce distance, refer to
page 171.With steering and lane guidance
assistant:
Adjust distance, refer to
page 171.Rocker switch:
Maintain, store, change speed,
refer to page 170.With steering and lane guidance
assistant:
Steering and lane guidance as‐
sistant including Traffic Jam As‐
sist on/off, refer to page 177.Radar sensor
The radar sensor is located in the front
bumper.
Always keep radar sensor clean and unob‐
structed.
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.
Switching on/off and interrupting
cruise control
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.
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Changing the speed
Press the rocker switch up or down repeatedly
until the desired speed is set.
If active, the displayed speed is stored and the
vehicle reaches the stored speed when the
road is clear.▷Each time the rocker switch is pressed to
the resistance point, the desired speed in‐
creases or decreases by 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.
Hold the rocker switch in position to repeat the
action.
Distance WARNING
The system does not relieve from the
personal responsibility. Due to the system lim‐
its, braking can be late. There is risk of acci‐
dents or risk of property damage. Be aware to
the traffic situation at all times. Adjust the dis‐
tance to the traffic and weather conditions and
maintain the prescribed safety distance, possi‐
bly by braking.◀
Without steering and lane guidance
assistant: reducing distance
Press button repeatedly until the de‐
sired distance is set.
Instrument cluster will display selected dis‐
tance, refer to page 172.
Without steering and lane guidance
assistant: increasing distance
Press button repeatedly until the de‐
sired distance is set.
Instrument cluster will display selected dis‐
tance, refer to page 172.
With steering and lane guidance
assistant: adjusting distance
Press button repeatedly until the de‐
sired distance is set.
Continuing cruise control
General information Press button with the system inter‐
rupted.
The stored speed is reached and maintained.
In the following cases, the stored speed value
is deleted and cannot be called up again:▷When the system is switched off.▷When drive readiness is switched off.
While standing
The system brought the vehicle to a complete
standstill:
▷Green marking in the speedometer:
Your vehicle accelerates automatically as
soon as the vehicle in the range of the ra‐
dar sensor moves off.▷Speedometer markings turn orange/white
after a short time: no automatic driving off.
By pressing the button, the time in
which there is automatic driving off is
extended.
Vehicle symbol in the distance indicator is
moving away: detected vehicle drove off.
The system was paused or your vehicle was
brought to a halt actively through stepping on
the brake pedal and it is standing behind an‐
other vehicle:
1. Press button to call up a stored
desired speed.2.Release the brake pedal.3.When the vehicle in front drives off:▷briefly press the gas pedal.Seite 171Driver assistance systemsControls171
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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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▷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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sion cannot be prevented under all circum‐
stances.
The function is available from walking speed
while backing up or rolling backward.
A press of the gas pedal interrupts the braking
intervention.
After emergency braking to a stop, further
creeping toward an obstacle is possible. To
creep toward the obstacle, lightly press the ac‐
celerator pedal and release it again.
If the accelerator pedal is heavily depressed,
the vehicle drives off as usual. Manual braking
is possible at any time.
General information The system uses the ultrasound sensors of
PDC and parking assistant.
Information WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. There is risk of an accident.
Adjust the driving style to the traffic condi‐
tions. Watch traffic and vehicle surroundings
closely and actively interfere in the respective
situations.◀
Activating/deactivating the system About iDrive:1."My Vehicle"2."Vehicle settings"3."Parking"4."Active PDC emergency brake function"5."Active PDC emergency brake function"
The setting is stored for the drive profile cur‐
rently used.
With parking assistant: side
protection
The concept Obstacles on the side of the vehicle are de‐
tected by the sensors of the system. The sys‐
tem warns against these obstacles.
Display
Obstacle markings are displayed sideways on
the vehicle to protect the vehicle sides.
▷Gray markings: the area next to the vehicle
was not captured.▷No markings: no obstacles were detected.▷Color markings: warning against detected
obstacles.
Limits of side protection
The system only displays stationary obstacles
that were previously detected by sensors while passing them.
The system does not detect, whether an ob‐
stacle moves later on. For this reason, at standstill, the markings are shown in the dis‐
play in gray after a certain time. The area next
to the vehicle must be newly captured.
System limits
Limits of ultrasonic measurement Ultrasonic measuring might not function under
the following circumstances:
▷For small children and animals.Seite 183Driver assistance systemsControls183
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▷For persons with certain clothing, e.g.
coats.▷With external interference of the ultra‐
sound, e.g. from passing vehicles or loud
machines.▷When sensors are dirty, iced over, dam‐
aged 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 couplings 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.
Cargo that extends beyond the perimeter of
the vehicle is not taken into account by the
system.
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
with ice.▷When sensors are covered in snow.▷On rough road surfaces.▷On uneven surfaces, such as speed
bumps.▷In large buildings with right angles and
smooth walls, e.g., in underground ga‐
rages.▷In automatic car washes.▷Through heavy pollution.▷Due to other ultrasound sources, e.g.,
sweeping machines, high pressure steam
cleaners or neon lights.
Malfunction
A Check Control message is displayed.
White symbol is displayed, and the
range of the sensors is dimmed on the
Control Display.
PDC has failed. Have the system checked.
Without Surround View:
rearview camera
The concept The rearview camera provides assistance in
parking and maneuvering backwards. The area
behind the vehicle is shown on the Control
Display.
Information WARNING
The system does not relieve from the
personal responsibility to correctly assess the
traffic situation. There is risk of an accident.
Adjust the driving style to the traffic condi‐
tions. Watch traffic and vehicle surroundings
closely and actively interfere in the respective
situations.◀
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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.◀
CAUTION
The parking assistant can steer the vehi‐
cle over or onto curbs. There is risk of property
damage. Watch traffic closely and actively in‐
terfere in the respective situations.◀
An engine that has been switched off by the
Auto Start Stop function is restarted automati‐
cally when the parking assistant is activated.
Overview
Button in the vehicle
Parking assistant
Ultrasound sensors
With the four side ultrasound sensors, arrows,
and the ultrasound sensors of the PDC in the
bumpers, the parking spaces are measured
and the distances to obstacles determined.
To ensure full functionality:
▷Keep the sensors clean and free of ice, re‐
fer to page 294.▷When using high-pressure washers, do not
spray the sensors for long periods and
maintain a distance of at least 12 in/30 cm.▷Do not put stickers over sensors.
Requirements
For measuring parking spaces
▷Maximum speed while driving forward ap‐
prox. 22 mph/35 km/h.▷Maximum distance to row of parked vehi‐
cles: 5 ft/1.5 m.
Suitable parking space
General information:
▷Gap behind an object that has a min. length
of 1.7 ft/0.5 m.▷Gap between two objects with a minimum
length of approx. 1.7 ft/0.5 m.
Parallel parking to the road:
▷Min. length of gap between two objects:
your vehicle's length plus approx.
2.6 ft/0.8 m.▷Minimum depth: approx. 5 ft/1.5 m.
Diagonal parking:
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