Saturn 2004 Ion - Manual (Page 104)

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 lit. If it’s 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 five mph (8 km/h) or less until the display
reads a direction.
Compass Variance
The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to
compensate for compass variance if you live outside of
zone eight. Under certain circumstances, as during a
long distance cross-country trip, it will be necessary to
adjust for compass variance. Compass variance is
the difference between earth’s magnetic north and true
geographic north. If not adjusted to account for
compass variance, your compass could give false
readings.
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