Found this on RF


http://bmw-stuff.blogspot.com/2007/11/obc-parked-ventilation-retrofit-on-bmw.html

I use mine all summer when I end up parked in the sun at work :)

Great feature... I posted about it earlier this month:

http://forums.bimmerforums.com/forum/showthread.php?t=1003585

Mine has it, and I've never used it. Don't really see the point when the A/C can't run unless the engine is on, you're just blowing around warm air.