1999 Oldsmobile 88 Owner's Manual - Page 103

yellowblue Mirror Operation Compass Operation Press the COMPASS switch 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 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. Compass Calibration If the letter "C" should ever appear in the compass window, the mirror may need calibration. The mirror can be calibrated in one of two ways: 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. D Drive the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction, or D Drive the vehicle on your everyday routine. 2-47