Ford Mercury Villager 1997 Owner's Manual page 141

NOTE: When the combination lap/shoulder belt is unbuckled
and allowed to retract completely, the retractor will
switch to the vehicle sensitive (emergency) locking mode.
See the detailed instructions under Safety Seats for
Children in this chapter.
Shoulder Belt Height Adjustment
Driver and right front passenger
You can adjust the shoulder belt height to one of five (5)
positions.
To adjust the belt down, pinch the release button and slide the
adjuster down. To adjust the belt up, pinch the release button and
slide the adjuster up.
Make sure the adjuster is firmly in one of the five positions. The
belt should be adjusted up or down until the belt rests across
the middle of your shoulder.
The shoulder belt height adjuster
Seating and Safety Restraints
137