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:
Front fog light indicator light (if equipped)
This indicator light is on while the front fog
lights are on. ...
Air conditioner button
The air conditioner operates only when the engine is running.
Press the air conditioner button while the fan is in operation to turn on the
air conditioner. The indicator light will illuminate.
...
Driving Impressions
With its all-wheel-drive lineup, Subaru occupies a unique niche in the
compact-car market. The Legacy promises sufficient interior space for a small
family, and it is a competent sedan that offers ...
