Does anyone know of a product that will do this? A company called "Phat Noise" used to have a "Phat Box" product to accomplish this, but it has been discontinued and I have been unable to find another comparable unit. I don't want to have to hook an Ipod or mp3 player to hear music and would prefer a Hard Drive option that I can sync to my PC and download all my music once and for all. By the way I have a e39 (1999 540i). Thanks for any help you guys can provide.
I had a PhatBox in my E39 for several years; it was a great system. But then I replaced it with the Dension ice>Link, which provided a fully integrated iPod experience, displaying track info on the MID and everything. The hard drive option for your car is indeed an iPod and you can find the interface on sale here at EAS.
For further info on Phatbox (in case you want to try finding one on eBay), see my Road Music article in the September 2003 issue of Roundel.