Mercedes-Benz ML350 Operator's Manual page 259

Controls in detail
Driving systems
i
The message Parktronic on reappears
as soon as the system senses that you
get closer to the object again, even if
you cleared the message before by
pressing è ÿ k or
button j on the multifunction
steering wheel.
i
The Parktronic system is automatically
switched on when the ignition is
switched on.
Vehicles with original equipment
Mercedes-Benz Trailer Hitch Kit:
The rear Parktronic sensor will auto-
matically disengage when towing a
trailer as soon as the electrical connec-
tion between the vehicle and the trailer
has been established.
258
Parktronic* system malfunction
If only the red distance segments illumi-
nate and an acoustic warning sounds,
there is a malfunction in the Parktronic
system. The Parktronic system will auto-
matically switch off after 20 seconds.
Have the Parktronic system checked
by an authorized Mercedes-Benz Light
Truck Center as soon as possible.
If only the red distance segments illumi-
nate and no acoustic warning sounds, the
Parktronic system sensors are dirty or
there is an interference from other radio or
ultrasonic signals. The Parktronic system
will automatically switch off after
20 seconds.
Switch off the ignition ( page 34).
Clean the Parktronic system sensors
( page 377).
Switch on the ignition.
or
Check the Parktronic system operation
at another location to rule out interfer-
ence from outside radio or ultrasonic
signals.