Mercedes-Benz 2013 GL Class - Manual (Page 215)

PARKTRONIC monitors the area around your
vehicle using six sensors in the front bumper
and four sensors in the rear bumper.
:
Example: sensors in the front bumper,
left-hand side
Range of the sensors
General notes
! 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.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a
truck or a pneumatic drill could cause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
Side view
Top view
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 369).
Front sensors
Center approximately 40in
(approximately 100cm)
Corners approximately 24in
(approximately 60cm)
Rear sensors
Center approximately 48in
(approximately 120cm)
Corners approximately 32in
(approximately 80cm)
Driving systems
213
Driving and parking
Z