Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 185)

If indicator lamp ; is lit:
X Press button :.
Indicator lamp ; flashes. The vehicle is
adjusting to highway/high-speed level.
While the adjustment is taking place, a
message appears in the multifunction
display, e.g.:
If you press the % or a button on the
multifunction steering wheel, the message
will disappear.
Once highway level has been reached,
indicator lamp ; goes out. The Lowering
message disappears from the multifunction
display.
The vehicle automatically selects highway
level if you are driving at a speed above
50 mph (80 km/h) or if you drive for
approximately 20 seconds between 40 mph
(64 km/h) and 50 mph (80 km/h). Depending
on the ADS mode selected (
Y
page 180), the
vehicle is lowered to high-speed level at
higher speeds.
PARKTRONIC
Important safety notes
G WARNING
The PARKTRONIC is a supplemental system.
It is not intended to, nor does it replace, the
need for extreme care. The responsibility
during parking and other critical maneuvers
always remains with the driver.
G WARNING
Make sure no persons or animals are in or
near the area in which you are parking/
maneuvering. Otherwise, they could be
injured.
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is activated automatically when
you:
R switch on the ignition
R shift the transmission to position D, R or N
R release the electric parking brake
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
General notes
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 322).
Driving systems
183
Driving
and
parking
Z