Volvo V 70 Owner's Manual page 312

08 Starting and driving
||
The indicator window must show red.
Insert the towbar until you hear a click.
08
The indicator window must show green.
310
Turn the key anticlockwise to locked
position. Remove the key from the lock.
Check that the towbar is secure by pull-
ing it up, down and back.
WARNING
If the towbar is not fitted correctly then it
must be detached and reattached in
accordance with the previous instructions.
IMPORTANT
Only grease in the ball for the towing hitch,
the remainder of the towbar should be
clean and dry.