Pretty much. However, even in "no" mode (neither LED lit), the recirculation mode will be enabled "silently" if maximum cooling is needed. The "A" position is supposed to detect "noxious" fumes and the like, and turn on the recirc mode by itself.
Originally Posted by cordoor
Yes. A means it will automatically decide when to recycle the cabin air. M means it is recycling the cabin air because you told it to.
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2011 535i AT | Black Sapphire/Cinnamon | Premium | Heated Sts | Nav | Sirius | Anthracite Hdr & Trim
Prior: 2008 335i 6MT Sedan | Black Sapphire/Terra Leather | Premium | Cold | CA | OEM Alarm
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