Mercedes-Benz CLK-Class Owner's Manual page 274

Trailer tow hitch*
Clean the ball coupling and the ball cou-
pling recess if they are dirty or rusted. This
allows the ball coupling to be fitted and re-
moved safely and easily.
Remove the dirt with a clean, lint-free
cloth or a brush.
Remove traces of rust with a wire
brush.
!
Do not use a high-pressure cleaner to wash
the ball coupling. Do not use solvents.
P 31.10-2450-31
The following areas must be lightly oiled or
greased after cleaning:
1 Locking balls
2 Guide pin
3 Guide faces
4 Release lever
5 Coupling ball
Also lightly oil or grease the ball coupling
mounting on the vehicle.
Treat the lock with an acid-free and
resin-free oil.
Check that the trailer tow hitch is work-
ing properly on the vehicle.
i
You can have this cleaning work carried out
at any Mercedes-Benz Service Centre.
Operation
Care
271