Ford Expedition 2009 Owner's Manual page 308

Driving
Note: The default setting for the camera delay is off. Push the "Settings"
button found on the navigation screen (if equipped) to set the camera
delay feature to on or off.
When towing, the camera system will only see what is being towed
behind the vehicle; this might not provide adequate coverage as it
usually provides in normal operation and some objects might not be
seen.
The camera lens for the reverse camera system is located on the liftgate,
above the license plate. Keep the lens clean so the video image remains
clear and undistorted. Clean the lens with a soft, lint-free cloth and
non-abrasive cleaner.
Note: If the camera system image is not clear or seems distorted, it may
be covered with water droplets, snow, mud or any other substance. If
this occurs, clean the camera lens before using the reverse camera
system.
WARNING: The camera system is a reverse aid supplement
device that still requires the driver to use it in conjunction with
the rearview mirror and the side mirrors for maximum coverage.
WARNING: Objects that are close to either corner of the
bumper or under the bumper, might not be seen on the screen
due to the limited coverage of the camera system.
WARNING: Backup as slow as possible since higher speeds
might limit your reaction time to stop the vehicle.
WARNING: Do not use the camera system with the liftgate
open.
If the back end of the vehicle is hit or damaged, then check with your
authorized dealer to have your rear video system checked for proper
coverage and operation.
Night time and dark area use
At night time or in dark areas, the reverse camera system relies on the
reverse lamp lighting to produce an image. Therefore it is necessary that
both reverse lamps are operating in order to get a clear image in the
dark. If either of the lamps are not operating, stop using the camera
system, at least in the dark, until the lamp(s) are replaced and
functioning.
308
2009 Expedition (exd)
Owners Guide, 2nd Printing
USA (fus)