Buick 1994 Roadmaster Owner's Manual page 109

Automatic Mirror (Option)
Your Buick may have an automatic inside mirror.
The automatic mirror adjusts .for the glare of headlights
behind you. It detects changes in light, and then adjusts
for day or night operation.
During the day the mirror reflects all the light fkom
behind your car. At night, when the glare is too high, it
changes to the night mode. Then, it reflects only part of
the light from behind you. When the mirror changes to
the night mode, it holds that position until glare is no
longer present.
Automatidoff Switch
There is an automatic and an off position. When the
button on the bottom of the mirror is pressed up and has
a
green halo, the mirror is on automatic.
Press again to
turn off.
Time Delay
The mirror delays before changing from the night to th
day position. This delay prevents rapid changing of the
mirror as ,you drive under lights and through traffic.
Reverse Gear Day Mode
The reverse mode is another important feature of the
automatic mirror. When the shift lever is placed in "R"
(Reverse), the mirror shifts to the day mode. This gives
you a bright image in the mirror as you back up.
Front Reading Lights
There are two reading lights located on the rearview
mirror. Push the switch closest to the light to turn it on
or off.
Cleaning Photocells
Use a cotton swab and glass cleaner to clean the two
photocells that make the mirror work.
107