Originally Posted by X5Sport

Tom,

I thought so too, but I remember that the guy who installed it had to insert a short extension harness and then physically remove wires from the OEM connectors to the new Dension Quadlock extension connectorse wires around in order to allow the phone audio to still work and that meant moving wires from the OEM loom over to another position. I had an intermittent audio fault a few months later and BMW traced it to the quadlock wiring changes and pins having not been correctly re-inserted by the installer - who of course did not want to know and has long since disappeared so I can't even ask them now.

I guess I'll have to try to get a 'pin out' from BMW and then match it.

I think your new systems just use the wiring for the CD changer rather than the add on plugs etc to the radio module itself. In my install at present the CD changer is still plugged in but does nothing.

Thanks

Richard