2004 Buick Regal Owner's Manual - Page 94

Automatic Dimming Rearview Mirror Automatic Dimming Rearview Mirror with OnStar® The vehicle may have an automatic dimming rearview mirror with the OnStar® System. The automatic dimming feature is turned on or off by pressing the left button, located on the lower part of the mirror, for up to three seconds. When turned on, this mirror functions like the automatic dimming rearview mirror described previously. See Automatic Dimming Rearview Mirror on page 2-32. The vehicle may have an automatic dimming rearview mirror. Push the button in the center of the mirror to turn this feature on or off. When it is on, the mirror will darken gradually to reduce the glare of headlamps from behind. One photocell on the front of the mirror senses when it is becoming dark outside. Another photocell, facing rearward, senses headlamps behind you. To keep the photocells operating well, occasionally clean them with a cotton swab and glass cleaner. The mirror's two outer buttons operate the lamps on the bottom of the mirror. There are two lamps located on the bottom of the mirror. Each lamp is turned on and off by pressing the button next to the lamp. There are also three OnStar® buttons located at the bottom of the mirror. See your dealer for more information on the system and how to subscribe to OnStar®. See OnStar® System on page 2-34 for more information about the services OnStar® provides. 2-32