No reception

I just installed a new SONY CDX-MP80 deck in my '92 BMW 318i, but can figure out how to connect up to the antenna, which is not external. Any thoughts? What color is the wire from the car? Or is a special cable required?

Thank you.

I'm having the same problem with my e30 M3. Any thoughts from those in the know are much appreciated.

I just put a new sony head unit in my car, my radio works fine. A relo put it in for me, he did mention that he had to alter the standard lead to fit into the sony, he wasnt sure if id get reception, but i do... otherwise if you speak to an aftermarket car audio place i believe you can buy an adaptor lead to fit into the sony head unit. Sorry if I havent been much help..

I just put a pioneer in my 325. Had to get an adapter to hookup the antenna. I ordered mine from Crutchfield and I think it cost like 4 bucks. Reception is great. Good luck man.