1999 Buick Park Avenue Owner's Manual - Page 107

yellowblue Battery Rundown Protection This feature shuts off all lamps that are left on for more than 10 minutes when the ignition is off. This will keep your battery from running down. Electrochromic Day/Night Rearview Mirror (If Equipped) Mirrors Inside Manual Day/Night Rearview Mirror Your vehicle may have an automatic electrochromic day/night rearview mirror. When this feature is turned on, the mirror automatically changes to reduce glare from headlamps behind you. A photocell on the mirror senses when it is becoming dark outside. Another photocell built into the mirror face senses when headlamps are behind you. At night, when the glare is too high, the mirror will gradually darken to reduce glare (this change may take a few seconds). The mirror will return to its clear daytime state when the glare is reduced. When you are sitting in a comfortable driving position, adjust the mirror so you can see clearly behind your vehicle. Grip the mirror in the center to move it up or down and side to side. The day/night adjustment allows you to adjust the mirror to avoid glare from the lamps behind you. Pull the tab forward for daytime use; push it back for night use. 2-49