My wife has been driving my X5 for a few weeks and really liking the drive but I wanted it back so she abandoned her 325 for an 08 X3...

Question is how to connect iPhone 4 to the stereo. The phone works great through the navigation but I want to get my songs on the iPhone to play through the stereo....what do I need to do? It doesn't have the AUX input.

Thanks

Gary