I have tried everything I know of to stop the buzzing in my car. I wrapped the connectors in aluminum foil, held it at all possible spots away from the speakers and tried using the iphone dock. The only thing that has worked so far is to hold it between my legs and it still buzzes unless I put my hand over it (awkward looking), but I want to put a dock or holder somewhere in the car. Anyone have any more suggestions for getting rid of this? Maybe there is a case that would help or a cable with more shielding? Or something I can do to my car speakers? I am using a cassette adapter. Does installing an auxiliary input reduce the buzzing? Airplane mode is not an acceptable suggestion.