Heated mirror
To demist or defrost the outside rear-view mirrors, press the rear window demister switch.
The indication lamp (A) will illuminate while the demister is on.
The heater will be turned off automatically in about 20 minutes.

See also:
Hinges and latches lubrication
Check all latches and hinges, and lubricate if necessary by first cleaning and
then applying multipurpose grease. ...
Position lamp indication lamp
This indication lamp illuminates while the position lamps are on. ...
2009 Mitsubishi Outlander Review
Halfway through this review, I realized I was convincing myself — one
paragraph at a time — that I actually don't like the Mitsubishi Outlander, so I
had to reverse course. See, the utilitaria ...
