FORD 1999 E-450 - Manual (Page 71)

SEATING
Adjusting the front manual seat
Never adjust the driver’s seat or seatback when the vehicle is
moving.
Do not pile cargo higher than the seatbacks to avoid injuring
people in a collision or sudden stop.
Always drive and ride with your seatback upright and the lap
belt snug and low across the hips.
Lift handle to move seat forward or
backward.
Pull lever up to adjust seatback.
Seating and safety restraints
71