Saturn 2007 Ion Owner's Manual page 123

Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is on. If it is not,
press and hold the on/off button for
approximately six seconds until the green light
comes on, indicating that the mirror is in
automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button for
approximately six seconds until the green
indicator light turns off.
Compass Calibration
The compass may need calibration from time
to time.
In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed,
push in the on/off button for approximately
nine seconds or until CAL is displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until
the display reads a direction, or the word CAL
disappears.
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