Photosensors
The mirror has a photosensor attached on both the front and back sides. During nighttime driving, these sensors detect distracting glare from vehicle headlights behind you and automatically dim the mirror to eliminate glare and preserve your vision. For this reason, use care not to cover the sensors with stickers, or other similar items. Periodically wipe the sensors clean using a piece of dry soft cotton cloth or an applicator.
See also:
Channel preset
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Sirius satellite radio
Sirius satellite radio is a recent innovation that allows the listener to experience
digital sound quality and to have a greater variety of channels.
Use of satellite radio (Sirius) requires a tune ...