Cadillac 2009 DTS, Owner'S Manual

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Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
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(Rear Defogger): Press to turn the rear window
defogger on or off. Be sure to clear as much snow from
the rear window as possible. The rear window defogger
will turn off approximately 20 minutes after the button is
pressed if the vehicle is moving at slower vehicle speeds.
At higher vehicle speeds, the rear defogger may stay on
continuously. Each additional press will run the defogger
for approximately 10 minutes.
The heated outside rearview mirrors will turn on to help
clear fog or frost from the surface of the mirror when
the rear window defogger is on.
Notice: Do not use a razor blade or sharp object
to clear the inside rear window. Do not adhere
anything to the defogger grid lines in the rear glass.
These actions may damage the rear defogger.
Repairs would not be covered by your warranty.
Sensors
The solar sensor, located in the defrost grille, middle
of the instrument panel, monitors the solar radiation.
Do not cover the solar sensor or the system will not
work properly.
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