Cleaning The Mirror - Cadillac 2004 CTS Owner's Manual

To adjust for compass variance, do the following:
1. Find your current location and variance zone
number on the zone map that follows.
2. Press and hold the on/off button until a zone
number appears on the display.
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3. Once the zone number appears on the display,
press the on/off button quickly until you reach
the correct zone number. Stop pressing the button
and the mirror will return to normal operation.
If C appears in the compass window, the compass
may need calibration. See "Compass Calibration"
listed previously.

Cleaning the Mirror

When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause
the liquid cleaner to enter the mirror housing.