I'm trying to replace the becker grand prix 1432 in my '91 300e with and aftermarket cd player (JVC KD-SX980). Right now, about all I know how to do it take out the old head unit (thanks to JCE's article). Can anyone tell me how to go about doing this? Will the powered antenna still work after the install? I don't care about using the fader switch in the center console. Thank you very much!