See also:

Fuse box in the engine compartment
► Open the hood. Illustrated: GL 450 (GL 350 BlueTEC, GL 550 are similar) ► Remove any existing moisture from the fuse box using a dry cloth. ► To open: open clamps 2. ` ...

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING A malfunction in the system has been detected if one of the following conditions occurs:  - ...

Cruise control lever
1 To activate or increase speed 2 To activate or reduce speed 3 To deactivate DISTRONIC PLUS 4 To activate at the current speed/last stored speed 5 To set the specified minimum distance ...