Hunter399- How far did you get and what kept you from getting it done??
I'm not at all worried about getting the dash and all the components in....its all that unknown stuff. (like on the X5's, there are two signals from the OBC that the NAV won't get unless you replace instrument cluster) I've got a torrent of the wiring diagrams going now...I've got some serious homework ahead of me.
I'm already looking into the heater seat retrofit, which seems much simpler. (I've already retrofitted two of my previous cars with seat heaters.) That oem kit for the 320d should probably work with a s/o switch panel.
Hmm....Probably shoulda saved up $55K and just bought a new 335 with all the gizmos.. heh heh OH WELL