Ford Mercury Villager 1997 Owner's Manual page 205

2. Lift up on the seat position release lever and hold while
sliding the seat along the seat tracks in the floor of the vehicle.
Sliding the three-passenger seat
NOTE: When sliding the seat, be sure the middle belt
tongue and buckle are fastened. This will prevent
the belt from falling to the floor or becoming caught
between the seat cushion and the seatback. Keep the
middle seatbelt tongue and buckle fastened when
not in use.
Adjustable Rear Seating
201