i had the same issue with my car in mid jan. had to leave for a three-week trip and came back to the issue still persisting AND also the battery dying.
turns out i needed a new starter and a new battery. out of warranty. damage: $2,300. work was done at BMW Santa Monica.
FWIW, the car is a 2011 535i and has 43k miles on it. purchased Aug 2010.
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2011 535i Dark Graphite+Black Dakota | ZCV | ZPP | ZP2 | ZSP | Sport Auto
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