Compass Operation; Compass Calibration - Buick 2004 Park Avenue Owner's Manual

Automatic Dimming Rearview
Mirror with Compass
Your vehicle may have an automatic dimming rearview
mirror with a compass. Your vehicle's mirror may
®
also contain OnStar controls. See OnStar
page 2-41 for more information.
The mirror also includes an eight-point compass display
in the upper right corner of the mirror face.
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.
Mirror Operation
MIRROR: Press this button to turn on the automatic
dimming feature. Press it again to turn off the automatic
dimming feature.
O (On/Off): For mirrors equipped with OnStar
controls, press and hold this button for several seconds
to turn on the automatic dimming feature. Press and
hold it again to turn the automatic dimming feature off.
The green indicator light will come on when this
feature is active. The automatic dimming feature will be
active each time the vehicle is started.

Compass Operation

COMPASS: Press this button once to turn the compass
on or off.
O (On/Off): For mirrors equipped with OnStar
®
System on
press this button once to turn the compass on or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for about
two seconds. After two seconds, the mirror will display
the compass heading.

Compass Calibration

When on, the compass automatically calibrates as the
vehicle is driven. If, after two seconds, the display
does not show a compass heading (N for North,
for example), there may be a strong magnetic field
interfering with the compass. Such interference may be
caused by a magnetic antenna mount, magnetic
note pad holder or a similar magnetic item. If the letter
C should ever appear in the compass window, the
®
compass may need calibration.
The mirror can be calibrated by driving the vehicle in
circles at 5 mph (8 km/h) or less until the display reads
a direction.
Mirrors equipped with OnStar
in calibration mode by pressing and holding the
on/off button until a C is shown in the compass display.
®
controls,
®
controls can be placed
2-37