Saturn 2004 Ion - Manual (Page 106)

Automatic Dimming Rearview Mirror
with Compass and Temperature
Display
If your vehicle is equipped with an automatic dimming
mirror it will automatically dim to the proper level to
minimize glare from lights behind you after dark.
The mirror also includes a display in the upper right
corner of the mirror face. The compass reading and the
outside temperature will both appear in the display at
the same time.
Temperature Display
The temperature can be displayed by pressing the
TEMP button. Pressing the TEMP button once briefly,
will toggle the temperature reading from Fahrenheit (°F),
Celsius (°C), to off.
Automatic Dimming Mirror Operation
Press the COMP button to turn the automatic dimming
feature on and off. An indicator light on the bottom
of the mirror face will be on when the automatic dimming
feature is on.
Compass Operation
Press the COMP button once briefly to turn the compass
on or off.
When compass feature is on, the compass will show the
direction the vehicle is traveling, with a maximum of
two characters.
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 COMP button for approximately six 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 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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