FORD 2004 Expedition v.2 - Manual (Page 159)

The head restraints can be moved
up and down.
Push control to lower head restraint.
Folding down the third row seat to the load floor
To prevent possible damage to the seat or safety belts, ensure
that the safety belts are not buckled when moving the seat to the
load floor position.
2004 Expedition (exd)
Owners Guide (post-2002-fmt)
USA English (fus)
Seating and Safety Restraints
159