See also:

Problems with PARKTRONIC
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Activating the rear view camera
Make sure that the SmartKey is in position 2 in the ignition lock. Engage reverse gear. The area behind the vehicle is shown in the COMAND display with guide lines. ...

Showing the distance display
This function is only available with DISTRONIC PLUS. Press the or button on the steering wheel to select the DriveAssist menu. Press the or button to select Distance Display. Press ...