Ford F-250 Owner's Manual page 108

Driver Controls
INTERIOR MIRROR
The interior rearview mirror has two pivot points on the support arm
which lets you adjust the mirror up or down and from side to side.
WARNING: Do not adjust the mirror while the vehicle is in
motion.
Automatic dimming interior rear view mirror (if equipped)
The interior rear view mirror has an auto-dimming function. The
electronic day/night mirror will change from the normal (high reflective)
state to the non-glare (darkened) state when bright lights (glare) reach
the mirror. When the mirror detects bright light from behind the vehicle,
it will automatically adjust (darken) to minimize glare.
The mirror will automatically return to the normal state whenever the
vehicle is placed in R (Reverse) to ensure a bright clear view when
backing up.
Do not block the sensors on the front and back of the interior
rear view mirror since this may impair proper mirror
performance.
Note: A rear center passenger and/or raised rear center headrest (if
equipped) may also block the light from reaching the sensor.
Do not clean the housing or glass of any mirror with harsh
abrasives, fuel or other petroleum-based cleaning products.
Note: If equipped with a rearview camera system, a video image will
display in the mirror or the navigation system display (if equipped) when
the vehicle is put in R (Reverse). As you shift into any other gear from R
(Reverse), the image will remain for a few seconds and then turn off.
Refer to Rearview camera system in the Driving chapter.
108
2012 F-250/350/450/550 (f23)
Owners Guide, 1st Printing
USA (fus)