Cadillac 2004 DeVille Owner's Manual page 151

Use this system as an aid to help you in seeing objects
beyond the headlamps. Do this by occasionally
glancing at the image as you would a rearview mirror.
Do not stare at the image.
The Night Vision System can be operated if:
•
the instrument panel brightness knob is in any
position except OFF
•
it is dark enough outside
•
the headlamps or fog lamps (if equipped) are on
and
•
the ignition is turned to ON.
The controls for this feature are located to the left of
and below the steering wheel. They are used to adjust
the brightness and location of the image. Adjust the
IMAGE control so the image is as low as possible while
remaining visible.
Slide the dimmer control until the image is no brighter
than necessary to clearly and comfortably see the
image.
3-25