I dont know if this is relevant, but i had a problem (from the factory) with the cable that runs from the arm rest compartment to the iDrive on my 2010 535ix Sport Wagon, the symptom was that the iDrive could not detect the presence of the iPod,
while this is not the same as the symptoms you are experiencing you may want the dealer to examine and consider replacing this connector ... since it was the USB at fault.
One suggestion, why not try connecting the iPod via the USB in the glove box (and use a longer audio cable M/F to connect the analog audio jack to the one in the ctr console. If the quality is different (better) I would suggest that the connection from the
ctr console to the iDrive is at fault!
Last edited by Larry Cable; 05-14-2012 at 10:39 AM.