Cadillac 2002 DeVille, Owner'S Manual

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Night Vision System (Option)
The Night Vision System can help you see better when
you drive at night. The system works by sensing heat
given off by objects in its field of view. Warmer objects,
such as pedestrians, animals and other moving vehicles,
will appear whiter. Colder objects, such as the sky, signs
and parked vehicles, will appear darker.
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:
D The instrument panel brightness knob is in any
position except OFF
D it is dark enough outside,
D the headlamps or fog lamps (if equipped) are on and
D the ignition is turned to ON.