Buick 2005 Park Avenue - Manual (Page 99)

Mirror Operation
MIRROR: Press this button to turn the automatic
dimming feature on or off.
O (On/Off): For mirrors equipped with OnStar ®
controls, press and hold this button for several seconds
to turn on the automatic dimming feature on or off.
The indicator light will come on when this feature is on.
The automatic dimming feature will go on 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 ®
controls, press this button 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 direction of the vehicle.
Compass Calibration
When on, the compass automatically calibrates as the
vehicle is driven. If, after two seconds, the display
does not show a compass direction, (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 shows
a direction.
Mirrors equipped with OnStar ® controls can be placed
in calibration mode by pressing and holding the
on/off button until a C is shown in the compass display.
Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. 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 the vehicle is outside zone
eight. Under certain circumstances, as during a
long distance cross-country trip, it will be necessary to
adjust for compass variance. If not adjusted to
account for compass variance, the compass could give
false readings.
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