Cadillac 1996 Eldorado Owner's Manual page 106

Mirrors
Electrochromic Day/Night Rearview Mirror
Your Cadillac has an electrochromic dayhight
rearview mirror.
This mirror automatically changes to reduce glare from
headlamps behind you. A photocell on the'back of the
'mirror senses when it is becoming dark outside. Another
photocell built into the mirror surface 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.
On/Off Switch
Press the button at the base of the mirror to turn on the
automatic feature. The button has an indicator light to
show it is on. Press the button to turn the automatic
feature off.
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