I have a 2000 G500 with the Becker Audio 30 head unit. I would like to add an XM tuner and do not necessarily want to replace the Becker head unit (primarily to retain dashboard display and steering wheel controls). I am told that the only option is to install the XM receiver with the cassette tape adapter inserted into the Becker head unit. This is too sloppy for me. Anybody have any experience or suggestions on this?