Photosensors

The mirror has a photosensor attached on 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:
Quick With the Six
The Outback's base engine — a 170-horsepower four-cylinder — delivers
leisurely acceleration, in large part because of a continuously variable
automatic transmission that's in no hurry to respond ...
Maintenance tips
Some clips and fender linings must be removed before replacing the air cleaner
elements or specific bulbs. ...
MMT
Some gasoline contains an octane-enhancing
additive called MMT (Methylcyclopentadienyl
Manganese Tricarbonyl). If
you use such fuels, your emission control
system performance may deteriorate a ...
