Jeep 2008 Grand Cherokee SRT - Manual (Page 74)

MIRRORS
Automatic Dimming Mirror
This mirror automatically adjusts for annoying headlight
glare from vehicles behind you. You can turn the feature
on or off by pressing the button at the base of the mirror.
A light next to the button will indicate when the dimming
feature is activated.
Automatic Dimming Mirror
74 UNDERSTANDING THE FEATURES OF YOUR VEHICLE