Hi Guys, I am one very happy new owner of a 2006 Sprint Blue RS4, but have a couple of niggles to sort out. My glovebox multichanger works ok, however there is a loud whistling / interference when playing any CDs. Louder with the engine revs etc....This does not happen with the RNS-E head unit, ONLY the multichanger. Anyone come across this problem before and know what it is ? Got to get it sorted - very annoying. Thanks. Gareth.