Trailer Towing - Mercedes-Benz 2015 M-Class Operator's Manual

Ball coupling recess
Holes in the ball coupling and ball coupling recess
Insert the ball coupling horizontally into ball
X
coupling recess ; in the direction of the
arrow until the holes in ball coupling = are
in line with the holes in ball coupling
recess ?.
Bolt
Slide bolt A into the hole in the ball cou-
X
pling recess and the ball coupling to the
stop.
Bolt and spring cotter
Secure the bolt using spring cotter B.
X
Correctly installed and secured ball coupling
Check the ball coupling, bolt and spring
X
cotter for correct installation.
If the ball coupling cannot be correctly moun-
ted, remove the ball coupling. Under these
circumstances, the ball coupling must not be
used for trailer towing.
If the ball coupling cannot be locked and the
key cannot be removed, remove the ball cou-
pling and clean it. If the ball coupling can still
not be installed (locked) after it has been
cleaned, remove the ball coupling. The trailer
tow hitch must then not be used to tow a
trailer, as safe operation cannot be guaran-
teed.
Have the entire trailer tow hitch checked at a
qualified specialist workshop.
Coupling up a trailer
! Do not connect the trailer's brake system
(if featured) to the hydraulic brake system
Towing a trailer
Z
259