Buick 2000 LeSabre Owner's Manual page 109

Mirror Operation
The right side of the switch located at the bottom of the
mirror turns the electrochromic mirror on and off. To
turn on the automatic dimming feature, press MIRROR.
To turn off automatic dimming, press MIRROR again.
The green indicator light will be illuminated when this
feature is active.
Compass Operation
Press the COMPASS button once to turn the compass
on or off.
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When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, the
mirror will display the compass heading.
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. You
should remove the interference.
Compass Calibration
In order to calibrate, the letter "C" must be displayed in
the mirror compass window. If "C" is not displayed,
push the "COMPASS" button for approximately
eight seconds. The zone number will come up first and
then the letter "C" will be displayed.
The compass can be calibrated in one of two ways:
D
Drive the vehicle in two complete 360
five mph (8 km/h) or less until the display reads a
direction, or
D
Drive the vehicle on your everyday routine.
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