Volvo XC90 Owner's Manual page 159

06 Starting and driving
Detachable towbar*
7. Check that the towball section is secure by
pulling it up, down and back.
WARNING
06
If the towball section is not fitted correctly
then it must be removed and refitted in
accordance with the previous instructions.
IMPORTANT
Only grease in the ball for the towing hitch,
the remainder of the towball section should
be clean and dry.
*
158
Option/accessory, for more information, see Introduction.
8. Safety cable.
WARNING
Be sure to attach the trailer's safety cable to
the correct place.
Removing the towball
1. Insert the key and turn it clockwise to the
unlocked position.