I cant really speak to the din or installation situation of the BMW 328i - But if you only have a single DIN opening, and you insist on CD player try a 6 disc changer. You could put a changer in the trunk (or boot) and connect it to the Auxiliary input of the Empeg. You would have to have some small remote to control the changer.
Of course you will have to wait for the empeg tuner to get radio. But according to the last estimates I read around here that shouldn't be much longer (approx. end of September).
I think the visual still work both the tuner and the aux, but I have not tried this yet.
The other option is to get a car with double din. :-(
-Doug
(Mk2-12G-Blue)
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Cheers,
-Doug Morrison
Mk2-32G
Back light buttons, Neon red screen