Here is a thread (search) with lots of info about bleeding including from weasel (mechanic).

http://www.xoutpost.com/bmw-sav-foru...0i-engine.html


It sounds like it may not be a bleeding issue in your case, and could be something electrical perhaps?

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Currently driving: 2011 E70 x35i , 2011 E90 335d
Previous BMWs: 2007 E90 328i , 2005 E53 3.0i, 2011 F10 535i (6spd manual)