Mercedes-Benz 2013 CL Operator's Manual page 314

Driving systems
312
yellow segments showing operational
readiness = light up.
The selected transmission position
determines which warning display is active
when the engine is running.
Transmission
position
D
R
N
P
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
When the first red segment lights up, you hear
an intermittent warning for about two
seconds. From the second red segment, you
hear a continuous warning. This indicates that
you have now reached the minimum distance.
Deactivating/activating PARKTRONIC
To deactivate/activate PARKTRONIC
:
Indicator lamp
;
Warning display
Front area activated
Rear and front areas
activated
If the electric parking
brake is engaged: no
areas are activated
If the electric parking
brake is released:
rear and front areas
are activated
No areas activated
If indicator lamp ; lights up, PARKTRONIC is
deactivated.
i
PARKTRONIC is automatically activated
when you turn the SmartKey to position 2
in the ignition lock.