I've only had my 2010 128i for 10 days, but have heard funny interference noises a few times. To me it sounds like GSM cellphone interference. Did any of you have your phone (AT&T or T-Mobile in the US, pretty much any network in Europe) with you at the time? GSM phones are notoriously RF-leaky (they will break into any badly-shielded audio system). It sucks that this happens even with the power off! Just another item to add to the list of things about the stereo that suck. Good job the rest of the car makes up for it, eh?
