This link suggests that 6NF is needed for an MP3 player on a phone - see image.
http://www.bmwland.co.uk/forums/view...16563&start=40
I'm a bit annoyed about this because the dealers are completely clueless and I wasn't aware that I needed this on top of £2,500 worth of pro nav.
This doesn't explain why ScottX3's setup isn't working but I think it does explain some of the other problems people have had with no sound - but I might be wrong.
It's not a big deal for me because I don't keep any music on my iPhone, but I would have liked to have the option