The BMW iPod/USB interfaces.
Everyone has their favourite driving track or two. And now with the BMW iPod and USB interfaces, you can have a couple of thousand. Simply connect your iPod, iPhone, MP3 player or USB stick to the on-board system and choose your favourite songs from your entire collection. Once your device is plugged in, you can access your music library and control the volume using either the radio, the multifunction steering wheel or the iDrive Controller. Now you can have endless musical enjoyment without being distracted from driving.
iPod and iPhone is a registered trademark of Apple Computer.
This is from the BMW website....this change was incorporated, IIRC, in November 2010 for the MY2011....my build date is 2/2011. Prior to the change, my understanding is it required a special interface cord to allow downloading.
I'm going to try again tomorrow and if it doesn't work, I'll try downloading iTunes to a USB stick.