The issue is the little chrome trim piece that is directly behind the controls for the front windows. I just purchased a 2011 535i and noticed the next day that I had the same issue. I was coming from an infiniti and all the obscure/counter-intuitive BMW features had me convinced that there was some trick I had not learned. Stopped by dealership because the service interval display was showing up incorrectly and asked if I was missing something regarding the windows. They dug around and got the piece out. Couldn't get it to stay on so ordered me a new switch assembly. Seemed like overkill, but its warranty work so who am I to complain.
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