Ford Expedition Owner's Manual page 242

Parking Aids 241
Rear Camera Delay
Navigation display
When shifting the transmission out of R (Reverse) and into any gear
other than P (Park), the camera image remains in the display until the
vehicle speed reaches 5 mph (8 km/h). This occurs when the rear
camera delay feature is on, or until a radio button is selected.
Selectable settings for this feature are ON and OFF. The default setting
for the rear camera delay is OFF.
Rearview mirror display
When shifting out of R (Reverse) and into any other gear, the image in
the rearview mirror will remain on for a few seconds before it shuts off
to assist in parking or trailer hookup.
2013 Expedition (exd)
Owners Guide gf, 3rd Printing, April 2013
USA (fus)