FORD 2009 Explorer Sport Trac v.2 - Manual (Page 141)

REAR SEATS
If needed, when installing some high back child restraints, the head
restraints of the second row seating positions can be removed. Insert a
thin pointed object, such as a paper clip or pushpin, into the hole of
each head restraint guide and while lifting up remove the head restraint.
Store the head restraint in a secure location in the vehicle. To re-install
the head restraint, line the posts up in the holes on the seat back with
the head restraint strap facing the outside of the vehicle and push down
until the head restraint locks into place. Lift gently to ensure it is locked
into place.
Refer to Safety seats for children later in this chapter.
WARNING: If the head restraint has been removed from a
seating position to accommodate a high back child restraint, the
head restraint must be re-installed prior to use of the seat by any other
occupant in order to reduce the risk of personal injury in the event of
a collision.
2009 07+ Explorer Sport Trac (esp)
Owners Guide, 2nd Printing
USA (fus)
Seating and Safety Restraints
141