Jeep 2006 Liberty - Manual (Page 108)

Head Restraints
Head restraints can reduce the risk of whiplash injury in
the event of impact from the rear. Adjustable head
restraints should be adjusted so that the upper edge is as
high as practical. The head restraints have a locking
button that must be pushed inward to lower the head
restraint. The restraints may be raised without pushing in
the button.
Adjustable Head Restraints
108 UNDERSTANDING THE FEATURES OF YOUR VEHICLE