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Buick 2008 Lucerne - Compass Operation; Compass Calibration; Automatic Dimming Rearview Mirror with Compass

Buick 2008 Lucerne
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Automatic Dimming Rearview Mirror
with Compass
Your vehicle may have an automatic dimming rearview
mirror with a compass. This feature enables the
mirror to sense nighttime glare from vehicle headlamps
from behind and automatically dim to reduce the
glare to a safe level. The automatic dimming feature
turns on each time the vehicle is started.
O (On/Off): This is the on/off button.
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 indicator light, located to the left of the
on/off button, is on. If it’s not, press and hold the
on/off button until the 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 until the
indicator light turns off.
Compass Operation
Press the on/off 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 a few
seconds. After a few seconds, the mirror will display the
current compass direction.
Compass Calibration
If after a few 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, note pad holder, or similar object. If the
letter C or CAL appears in the compass window, the
compass may need to be reset or calibrated.
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.
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