Mercedes-Benz A Series Owner's Manual page 200

Lightly oil or grease positions
X
the ball coupling recess of the vehicle after
cleaning.
Treat the lock with an oil that is acid and
X
resin-free.
Check that the vehicle's trailer coupling is
X
working properly.
!
Observe the note on care provided by the
trailer manufacturer.
i
Maintenance of the ball coupling and
trailer coupling can also be performed by
any Mercedes-Benz Service Centre.
H Environmental note
Dispose of oily and greasy cloths in an envi-
ronmentally-responsible manner.
1 to 5 and
Operation
Care
Z
197