
Controls
 71Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Radar sensors
1Long-range sensor
2Location of the short-range sensors behind 
the bumperHeavy rain and also dirt, snow or ice can limit 
the detection of vehicles ahead. If needed, 
clean the radar sensor under the front bumper 
as well as the bumper area covering the short 
range sensors. When doing so, be particularly 
careful in removing layers of snow and ice.
Do not apply adhesive labels etc. in the area of 
the short-range sensors.
If the sensor is not aligned properly, e. g. due to 
damage, the active cruise control cannot be 
activated.
System limitations
As with conventional cruise control sys-
tems, active cruise control in no way 
diminishes or substitutes for the driver's own 
personal responsibility, alertness and aware-
ness in adjusting speed, braking or otherwise 
controlling the vehicle. The driver should 
decide when to use the system on the basis of 
road, traffic, visibility, and weather conditions. 
Active cruise control is intended for use on free-
way-type roadways where traffic is moving rel-
atively smoothly. Do not use this system in city 
driving; in complex driving situations; on curvy, 
winding roads, slippery roads or roads with 
sharp curves such as highway off-ramps; during 
inclement weather such as snow, strong rain or 
fog; or when entering interchanges, service/
parking areas or toll booths. It is also important 
to regulate your vehicle's speed and distance 
setting within applicable legal limits. Always be 
ready to take action or apply the brakes if nec-
essary, especially when the system is actively 
following a vehicle in front of you.
tions. For example, the system may not detect 
vehicles driving ahead if they suddenly brake 
heavily in stop-and-go traffic during accelera-
tion. The system will not apply the brakes or 
slow your vehicle when a very slow-moving 
vehicle, stopped vehicle or stationary object is 
in the lane ahead of you, for example when 
approaching a traffic light or parked vehicle or 
when a vehicle is stalled in your lane. Also, the 
system does not react to oncoming traffic, 
pedestrians or other types of potential traffic 
such as a rider on a horseback. It is also possible 
that the system may not detect smaller moving 
objects such as motorcycles or bicycles. Be 
especially alert when encountering any of these 
situations as the system will neither automati-
cally brake, nor provide a warning to you. Also, 
be aware that every decrease in the distance 
setting allows your vehicle to come closer to a 
vehicle in front of you and requires a heightened 
amount of alertness.< 

Controls
 85Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Technology for comfort, convenience and 
safety
PDC Park Distance Control*
The concept
The PDC assists you when you are parking. 
Acoustic signals and an optical display
* alert 
you to the approach of an object from behind 
your vehicle. To measure the distance, there 
are four ultrasonic sensors in each bumper. 
The range of these sensors is approx. 7 ft/2 m. 
However, an acoustic warning first sounds for 
the sensors at the front and at the two rear cor-
ners at approx. 24 in/60 cm, and for the center 
rear sensors at approx. 5 ft/1.50 m.
PDC is a parking aid that can indicate the 
presence of objects when they are being 
approached slowly, as is usually the case when 
parking. Avoid approaching an object at high 
speed; otherwise, the physical circumstances 
could cause the system warning to be activated 
too late.<
Switching on automatically
The system starts to operate approx. one sec-
ond after you shift into reverse or move the 
selector lever into position R with the engine 
running or the ignition switched on.
Wait this short time before driving off.
Switching on manually
Press the button; the LED lights up.
Switching off manually
Press the button again; the LED goes out.
Automatic deactivation
After driving approx. 165 ft/50 m or at over 
approx. 20 mph/30 km/h, the system is 
switched off and the LED goes out. You can 
reactivate the system manually as needed.
Signal tones
An intermittent signal indicates the distance of 
the vehicle from an object being approached. 
Thus, an object detected to the left rear of the 
vehicle will be indicated by a signal tone from 
the left rear speaker, etc.  As the distance 
between vehicle and object decreases, the 
intervals between the tones become shorter. If 
the distance to the nearest object falls to below 
roughly 1 ft/30 cm, then a continuous tone 
sounds.
An intermittent tone is interrupted after approx. 
3seconds:
>if you remain in front of an object that was 
only detected by one of the corner sensors
>if you drive parallel to a wall
Malfunction
The LED in the button flashes and a message 
appears on the Control Display. PDC is mal-
functioning. Have the system checked.
As a preventive measure, keep the sensors 
clean and free of ice or snow in order to ensure 
that they will continue to operate effectively. Do 
not spray the sensors with high-pressure clean-
ers for long periods and maintain a distance of 
at least 4 in/10 cm to them. 

Lamps
102
Lamps
Parking lamps/low beams
0Lights off and daytime running lamps*
1Parking lamps and daytime running lamps*
2Low beams and welcome lamps
3Automatic headlamp control, daytime run-
ning lamps
*, welcome lamps, Adaptive 
Head Light
* and high-beam assistant*
If you open the driver's door with the ignition 
switched off, the exterior lighting is automati-
cally switched off when the light switch is in 
position2 or 3.
Parking lamps
In switch position1, the front, rear and side 
vehicle lighting is switched on. You can use the 
parking lamps for parking.
The parking lamps drain the battery. Do 
not leave them switched on for long peri-
ods of time, otherwise it may no longer be pos-
sible to start the engine. It is preferable to 
switch on the roadside parking lamps on one 
side, refer to page104.<
Low beams
The low beams light up when the light switch is 
in position 2 and the ignition is on.
Automatic headlamp control
In switch position3, the system activates the 
low beams and switches them on or off in 
response to changes in ambient light condi-
tions, for instance, in a tunnel, at dawn and dusk 
and in case of precipitation. Adaptive Head 
Light
* is active. The LED next to the symbol is 
illuminated when the low beams are on.
You can activate the daytime running lamps, 
refer to page103. In the situations named 
above, the system then automatically switches 
over to the low beams.
A blue sky with the sun low on the horizon can 
cause the lights to be switched on.
The low beams remain on independent of 
the ambient lighting conditions when you 
switch on the fog lamps.<
The automatic headlamp control cannot 
serve as a substitute for your personal 
judgment in determining when the lamps 
should be switched on in response to ambient 
lighting conditions. For example, the sensors 
cannot detect fog of hazy weather. To avoid 
safety risks, you should always switch on the 
low beams manually under these conditions.<
Welcome lamps
If you leave the light switch in position2 or 3 
when parking the vehicle, then when you unlock 
the vehicle, the parking lamps and interior light-
ing remain illuminated for a brief time.
Activating/deactivating welcome 
lamps
iDrive, for operating principle refer to page16.
1.Press the   button.
This opens the start menu.
2.Press the controller to open the   menu.
3.Select "Settings" and press the controller.
4.Select "Vehicle / Tires" and press the con-
troller.