Volvo S80 Owner's Manual page 106

OPEN
Turn the key anticlockwise to the locked
position and remove it from the lock.
OPEN
Turn the lever clockwise to the locked position
and grip the towball.
Refit the connector pin cover as in
the illustration.
Grasp the towbar. Pull the towball section from
the connector pin. Do not hold the lever.
IMPORTANT!
The lock on the towball can only be locked
when the red plastic pin is not visible
105