FORD 2009 F-550 v.1 - Manual (Page 171)

40/20/40 front seat armrest and console (if equipped)
To release the armrest, pull forward
on the strap and pull the armrest
down.
To gain access to the storage
compartment in your armrest, lift
the latch to open the lid. The lid
cannot be opened in the upright
position.
Lift up armrest to return it to a
center seatback.
2009 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)
Seating and Safety Restraints
171