Mercury 2009 Mountaineer Owner's Manual page 168

Seating and Safety Restraints
2. Lift up on the head restraint until
it locks into its original position.
To return the seat to the upright position (E-Z entry equipped
seats):
1. Lift the seatback toward the rear
of the vehicle.
2. Rotate the seatback until you
hear a click, locking it in the upright
position.
3. If the seat is to be occupied, lift
up on the head restraint until it
locks into its original position.
WARNING: Before returning the seatback to its original position,
make sure that cargo or any objects are not trapped behind the
seatback. After returning the seatback to its original position, pull on the
seatback to ensure that it has fully latched. An unlatched seat may
become dangerous in the event of a sudden stop or collision.
168
2009 Mountaineer (mnt)
Owners Guide, 2nd Printing
USA (fus)