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:
SCAN (only when connecting USB storage device)
Scan is operated in the same way a CD is played. For details, refer to “Scan”.
NOTE
When an iPod® is connected, you cannot select the SCAN mode. ...
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.
...
Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low
driving speeds) a few minutes each month during the off-season to circulate its
oil. ...