ViseeO Tune2air WMA1000 - Wireless Bluetooth Music Interface Adaptor for in-car iPod Integration (Audi, Volkswagen, Mercedes etc)
Works as advertised in my 2008 Mercedes c300. Essentially just makes the bluetooth function the exact same as the ipod did before. Exact same things come up on the main screen and steering wheel. Can also simultaneously take calls on the MB bluetooth. So far 10/10 would buy again.