Range Of The Sensors; Warning Display - Mercedes-Benz 2011 GLK-Class Operator's Manual

Driving systems
152
PARKTRONIC is activated automatically when
you:
switch on the ignition.
R
shift the transmission to position D, R or
R
N.
release the parking brake.
R
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). It is reactivated at lower
speeds.
PARKTRONIC monitors the area around your
vehicle using six sensors in the front bumper
and four sensors in the rear bumper.
Sensors in the front bumper, left-hand
:
side (example)

Range of the sensors

The sensors must be free of dirt, ice and
slush; otherwise they may not function
correctly. Clean the sensors regularly, taking
care not to scratch or damage them
( Y page 240).
Side view
Top view
Front sensors
Center Approx. 40 in (100 cm)
Corners Approx. 24 in (60 cm)
Rear sensors
Center Approx. 48 in (120 cm)
Corners Approx. 32 in (80 cm)
! When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of
the vehicle. You could damage the vehicle
or the objects.
Ultrasonic sources such as an automatic
car wash, a truck's compressed-air brakes
or a pneumatic drill could cause
PARKTRONIC to malfunction.
Minimum distance
If there is an obstacle within this range, all
warning displays light up and a warning tone
sounds. If the distance falls below the
minimum, the distance may no longer be
shown.
Warning displays
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is located
on the dashboard above the center air vents.