First, it's an X5 3.0, 2001, no dsp or nav or cd changer.

I've been doing some searching and basically found to get an aux in I'd need to replace the radio unit in the trunk with one from 2003 or newer and that could run $250. I don't want to spend that much and I'd be afraid of breaking something.

I actually e-mailed BMW to ask about aux-in and they said no, but I can get the iPod adapter. It looks around $150. Thing is, I have a Neuros 2 (and like it, though it's not made anymore), not an iPod. I'm sure you could mod it to work with anything, but that's not worth it for me.

Are there any options I don't see besides its (the Neuros's) built-in FM transmitter? It's not that bad, but I want to make sure I'm not missing anything.

Thanks, this is a great resource!