FORD 2011 F-150 v.1 - Manual (Page 106)

On vehicles not equipped with rear defrost, press the heated mirror
control
located on the climate control panel. For more information
refer to the Climate Controls chapter.
Note: If your vehicle is equipped with the Auto dimming feature, the
mirror glass is thicker and will take longer to defrost.
Do not remove ice from the mirrors with a scraper or attempt to
readjust the mirror glass if it is frozen in place. These actions
could cause damage to the glass and mirrors.
Do not clean the housing or glass of any mirror with harsh
abrasives, fuel or other petroleum-based cleaning products.
Signal indicator mirrors (if equipped)
When the vehicle turn signal is
activated, the lower portion of the
mirror housing will blink.
This feature provides an indicator to
the driver that the vehicle turn
signal is working properly.
Telescoping trailer tow mirrors (if equipped)
The telescoping feature allows the
mirror to extend approximately
3.5 inches (90 mm). This feature is
especially useful to the driver when
towing a trailer. Pull the mirrors
inward carefully when driving
through a narrow space.
Blind spot mirrors (if equipped)
Your vehicle may be equipped with blind spot mirrors. Refer to Blind
spot mirrors in the Driving chapter.
Driver Controls
106
2011 F-150 (f12)
Owners Guide, 1st Printing
USA (fus)