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:
Dimensions
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Reliability, Safety & Features
The prior Outback had above-average reliability, but the new one hasn't been
on the market long enough to gauge. In crash tests by the Insurance Institute
for Highway Safety, the Outback received ...
To increase the speed (by the “RES/ SET” switch)
Press the “RES/SET” switch to the “RES” side and hold it until the vehicle reaches
the desired speed. Then, release the switch. The vehicle speed at that moment will
be memorized and treated as ...