This video covers process of installing a DICE Mediabridge Microphone in a Z4 (M Coupe, Roadster, E46 and other late model BMWs are quite similar). A simple install, this mic, the DICE Mediabridge, and your iPhone allow seemless Bluetooth audio in your BMW.
will this work for Z4′s with DSP and a Navigation computer? Would it display all the data on the Navi screen and can I still use the bluetooth steering wheel controls with this system? Do we still need to install this microphone if our car is prewired with a microphone on the steering column?