General notes
You can make a connection to the 13-pin socket on the ball coupling using an adapter or, if necessary, an adapter cable. Both can be obtained in a qualified specialist workshop.
Installing the adapter
Make sure that there is enough slack in the cable for cornering so that the cable cannot become detached.

► Open the socket cover.
► Insert the connector with lug 1 into groove 2 on the socket and turn the connector clockwise to the stop.
► Make the cover engage.
► If you are using an adapter cable, secure the cable to the trailer with cable ties.
When the socket is connected, the ultrasonic backing up aid is deactivated.
Information on copyright
General information
You can find information on licenses for free
and open-source software used in your
vehicle and its electronic components on the
following website:
http://www.mercedes-benz.co ...
Removing the ball coupling
X Remove the spring cotter.
■ Remove the bolt from the ball coupling
recess.
■ Remove the ball coupling from the ball
coupling recess.
■ Clean the ball coupling if it is dirty.
...
Manual drive program
Introduction
In drive program M, you can change gear
manually using the steering wheel paddle
shifters. For this, the transmission must be in
position D. The gear currently selected and
engaged i ...