Mercedes-Benz CL 55 AMG Operator's Manual page 293

Instruments
Operation
and controls
Parking system
The obstacle may not be recognized if outside the
shaded sensor field, and no longer be indicated when
approaching it any closer (warning indicators go out).
Parktronic malfunction
All red segments of the warning indicators light up, and
a warning sounds for 3 seconds, if Parktronic does not
function properly. The indicator lamp in the switch
lights up and the system switches off automatically!
A dirty sensor or other ultrasonic signals could be the
reason. See page 384 for instructions on cleaning the
sensors in the bumpers.
After cleaning the sensors, turn electronic key in starter
switch to position 2. If the defect continues to be
displayed, have the system checked at your authorized
Mercedes-Benz Center.
Instrument
Driving
cluster display
Practical hints Car care
290
Parktronic switch
The switch is located on the center console.
1 Parktronic switched off
2 Parktronic switched on
3 Indicator lamp – comes on when Parktronic is
switched off
The parktronic system is switched on again when
turning the electronic key in starter switch position 2.
Technical
Index
data
3