Mercedes-Benz G-Class 2013 Owners Manual - Manual (Page 198)

One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an
intermittent warning tone for
approximately two seconds.
R
seventh segment onwards, you will hear a
warning tone for approximately two
seconds. This indicates that you have now
reached the minimum distance.
Deactivating/activating PARKTRONIC
:
Indicator lamp
;
To deactivate/activate PARKTRONIC
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.
Towing a trailer
PARKTRONIC is deactivated for the rear area
when you establish an electrical connection
between your vehicle and a trailer.
196
Driving systems
Driving and parking