FORD 2013 F-550 v.1 - Manual (Page 94)

Auto-Dimming Mirror (If Equipped)
Note: Do not block the sensors on the front and back of the mirror.
Mirror performance may be affected. A rear center passenger or raised
rear center head restraint may also block light from reaching the sensor.
The mirror will dim automatically to reduce glare when bright lights are
detected from behind your vehicle. It will automatically return to normal
reflection when you select reverse gear to make sure you have a clear
view when backing up.
SUN VISORS
Slide-On-Rod (If Equipped)
Rotate the visor toward the side
window and extend it rearward for
extra sunlight coverage.
Retract the visor before moving it
back toward the windshield and
storing it.
Illuminated Visor Vanity Mirror (If Equipped)
Lift the cover to switch on the
lamp.
Windows and Mirrors 93
2013 F-250/350/450/550 (f23)
Owners Guide gf, 1st Printing
USA (fus)