▷Automatic closing of the glass sunroof, in‐
cluding sliding visor.▷For vehicles equipped with Comfort seats
in the front: automatic positioning of the
backrest for the front passenger seat.▷For vehicles equipped with Comfort seats
in the rear: automatic positioning of the
backrests for the rear passenger seats.
After a critical driving situation without an acci‐
dent, the front belts are loosened again. All
other systems can be restored to the desired
setting.
If the belt tension does not loosen automati‐
cally, stop the vehicle and unbuckle the belt
using the red button in the buckle. Fasten the
belt before continuing on your trip.
Post Crash — iBrake The conceptIn certain accident situations, e.g. collision, the
system can bring the vehicle to a halt automat‐
ically without driver intervention. This can re‐
duce the risk of a further collision and the con‐
sequences thereof.
At standstill After coming to a halt, the brake is released
automatically.
Harder vehicle braking
It can be necessary to bring the vehicle in cer‐
tain situations to a halt quicker.
Here, a higher braking pressure must be gen‐
erated for a short period when pressing the brake pedal than during automatic braking.
This interrupts automatic braking.
Interrupting automatic braking It can be necessary to interrupt automatic
braking in certain situations,e.g. for an evasive
maneuver.
Interrupt automatic braking:
▷By pressing the brake pedal.▷By pressing the accelerator pedal.
Attentiveness assistant
The concept The system can detect increasing lack of alert‐
ness or fatigue of the driver during long, mo‐
notonous journeys, e.g., on highways. In this
situation, it is recommended that the driver
takes a break.
Information WARNING
The system does not relieve from the
personal responsibility to correctly assess
one's physical state. An increasing lack of
alertness or fatigue may not be detected or not
be detected in time. There is risk of an acci‐
dent. Make sure that the driver is rested and
alert. Adjust the driving style to the traffic con‐
ditions.◀
Function
The system is switched on each time drive
readiness is switched on.
After travel has begun, the system is trained
about the driver, so that increasing lack of alertness or fatigue can be detected.
This procedure takes the following criteria into
account:
▷Personal driving style, e.g., steering behav‐
ior.▷Driving conditions, e.g., length of trip.
Starting at approximately 43 mph/70 km/h, the
system is active and can display a recommen‐
dation to take a break.
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Break recommendation
Switching on/off, adjusting The Attentiveness Assistant is active automat‐
ically with each switching on of drive readiness
and can thus display a break recommendation.
The break recommendation can also be
switched on or off via iDrive and adjusted:
About iDrive:1."My Vehicle"2."Vehicle settings"3."Driver attention control"4.Select desired setting.▷"Off": no break recommendation is
made.▷"Standard": the break recommendation
is made with a defined value.▷"Sensitive": the break recommendation
is issued earlier.
Display
If the driver becomes increasingly less alert or
fatigued, a message is displayed in the Control
Display with the recommendation to take a
break.
During the display, the following settings can
be selected:
▷"Do not ask again"▷"Places to stop"▷"Remind me later"
The break recommendation is repeated af‐
ter 20 minutes.
After a break, another recommendation to take
a break cannot be displayed until after approxi‐
mately 45 minutes.
System limits
The function may be limited in the following
situations, for instance, and will either output
an incorrect warning or no warning at all:
▷When the clock is set incorrectly.▷When the vehicle speed is mainly below
about 43 mph/70 km/h.▷With a sporty driving style, such as during
rapid acceleration or when cornering fast.▷In active driving situations, such as when
changing lanes frequently.▷When the road surface is poor.▷In the event of strong side winds.Seite 162ControlsSafety162
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WARNING
When driving with roof load, e.g. with
roof-mounted luggage rack, driving safety may
not be ensured in driving-critical situations due
to the elevated center of gravity. There is risk
of accidents or risk of property damage. Do not
deactivate Dynamic Stability Control DSC
when driving with roof load.◀
Overview
Button in the vehicle
DSC OFF
Indicator/warning lights The indicator lamp flashes: DSC con‐
trols the drive and braking forces.
The indicator lamp lights up: DSC has
failed.
Deactivating/activating DSC
When DSC is deactivated, driving stability is
reduced during acceleration and when driving
in curves.
Stabilizing interventions by the Integral Active
Steering system are only performed by the
rear axle steering.
To increase vehicle stability, activate DSC
again as soon as possible.
Deactivating DSC
Hold the button down until the DSC
OFF indicator lamp is displayed in the
instrument cluster and DSC OFF is displayed.
The DSC system is switched off.
The steering and, depending on the equip‐
ment, suspension are tuned for sporty driving.
Activating DSC Press button.
DSC OFF and the DSC OFF indicator
lamp go out.
Indicator/warning lights
When DSC is deactivated, DSC OFF is dis‐
played in the instrument cluster.
The indicator lamp lights up: DSC is
deactivated.
DTC Dynamic Traction
Control
The concept The DTC system is a version of the DSC where
forward momentum is optimized.
The system ensures maximum headway on
special road conditions or loose road surfaces,
e.g., unplowed snowy roads, but with some‐
what limited driving stability.
Activating the Dynamic Traction Control DTC
provides maximum traction. Driving stability is
limited during acceleration and when driving in
curves.
Therefore drive with appropriate caution.
You may find it useful to briefly activate DTC
under the following special circumstances:▷When driving in slush or on uncleared,
snow-covered roads.Seite 164ControlsDriving stability control systems164
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▷When freeing vehicle from deep snow or
driving off from loose grounds.▷When driving with snow chains.
Overview
Button in the vehicle
DSC OFF
Indicator/warning lights
If DTC is activated, TRACTION is displayed in
the instrument cluster.
The indicator lamp lights up: DTC Dy‐
namic Traction Control is activated.
Activating/deactivating DTC
Activating DTC Press button.
TRACTION is displayed in the instru‐
ment cluster and the indicator lamp for DSC
OFF lights up.
Deactivating DTC Press button again.
TRACTION and the DSC OFF indica‐
tor lamp go out.
xDrive
xDrive is the all-wheel-drive system of the ve‐
hicle. Concerted action by the xDrive and DSC
further optimize traction and driving dynamics.
The xDrive all-wheel-drive system variably dis‐
tributes the drive forces to the front and rear
axles as demanded by the driving situation and
road surface.
HDC Hill Descent Control
The concept
HDC is a downhill driving assistant that auto‐
matically controls vehicle speed on steep
downhill gradients. Without applying the
brakes, the vehicle moves at slightly more than
walking speed.
Hill Descent Control can be activated at
speeds below approx. 22 mph/35 km/h. When
driving downhill, the vehicle reduces its speed
to approx. walking speed and then keeps its
speed constant.
As long as there is active braking, the system
is on standby. The system does not brake the
vehicle during this time.
Only use HDC in low gears or in selector lever
position D or R.
Increasing or decreasing vehicle
speed
Specify desired speed in the range from ap‐
prox. 4 mph/6 km/h to approx. 15 mph/25 km/h
using the rocker switch of the cruise control on
the steering wheel. Vehicle speed can be
changed by lightly accelerating.Seite 165Driving stability control systemsControls165
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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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Switch off
To switch off the system while standing, step
on brake pedal at the same time.
Press button on the steering wheel.
The displays go out. The stored desired speed
is deleted.
Interrupting When active, press the button on the
steering wheel.
If interrupting the system while stationary,
press on the brake pedal at the same time.
The system is automatically interrupted in the
following situations:▷When the brakes are applied.▷When selector lever position D is disen‐
gaged.▷When DTC Dynamic Traction Control is
activated or DSC is deactivated.▷When DSC is actively controlling stability.▷If the safety belt and the driver's door are
opened while the vehicle is standing still.▷If the system has not detected objects for
an extended period, e.g., on a road with
very little traffic without curb or shoulder
markings.▷If the detection range of the radar is dis‐
rupted, e.g., by dirt or heavy fog.▷After a longer stationary period when the
vehicle has been braked to a stop by the
system.
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.◀
WARNING
Risk of accident due to too high speed
differences to other vehicles, e.g. in the follow‐
ing situations:▷When fast approaching a slowly moving
vehicle.▷Suddenly swerving vehicle onto the own
lane.▷When fast approaching standing vehicles.
There is risk of injuries or danger to life. Watch
traffic closely and actively interfere in the re‐
spective situations.◀
Maintaining/storing the speed Press button.
Or:
Press the rocker switch 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 speedometer and
briefly in the instrument cluster, refer to
page 172.
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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Indicator/warning lightsSymbolDescriptionGreen symbols:
A vehicle has been detected
ahead of you. The system
maintains the set distance to
the vehicle in front.Vehicle symbol flashes:
The conditions are not ade‐
quate for the system to work.
The system was deactivated
but applies the brakes until you
actively resume control by
pressing on the brake pedal or
accelerator pedal.The vehicle symbol and dis‐
tance bars flash red and an
acoustic signal sounds:
You are requested to intervene
by braking or make an evasive
maneuver.
Displays in the Head-up Display
With Active Cruise control, some system infor‐
mation can also be displayed in the Head-up
Display.
The symbol is displayed on the Head-
up Display if the set desired speed is
reached.
Distance information The symbol is displayed when the dis‐
tance from the vehicle traveling ahead
is too short.
The distance information is active under the
following circumstances:
▷Active Cruise Control switched off.▷Display in the Head-up Display selected,
refer to page 126.▷Distance too short.▷Speed greater than approx.
40 mph/70 km/h.
System limits
Speed range The system is best used on well-constructedroads.
The minimum speed that can be set is
20 mph/30 km/h.
The maximum speed that can be set is
115 mph/180 km/h.
The system can also be activated when sta‐
tionary.
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.
Deceleration
The system also does not decelerate in the fol‐
lowing situations:
▷For pedestrians or similar slow-moving
road users.▷For red traffic lights.▷For cross traffic.▷For oncoming traffic.Seite 173Driver assistance systemsControls173
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