I'm not aware of any issues with iPods/iPhones since at least Dec 2007 (when it was on 6th gen iPod, classic, etc.)

I think what's more important is what model Y-adapter cable you have. Since your car was produced there's been at least three P/N 611120440645, 612230440796, 6112044812. The Y-adapter has the bolded numbers on them in raised lettering. I have the second one, in my 2008 E70, and have no problem with any iPod or iPhone models. I think the only problems are with the first one I listed...