FORD 2010 F-550 v.2 - Manual (Page 168)

The control is located on the outboard side of the seat cushion.
Press front to raise or lower the
front portion of the seat cushion.
Press rear to raise or lower the rear
portion of the seat cushion.
Press the control to move the seat
forward, backward, up or down.
Using the manual lumbar support
The lumbar support control is
located on the outboard side of the
seat
Turn the lumbar support clockwise
for more support.
Turn the lumbar support
counterclockwise for less support.
Seating and Safety Restraints
168
2010 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)