Don't know if it would help, I have just fitted a Parrot Asteroid Smart into my c180k w203.
So far it is absolutely fantastic. Full connectivity for my iPhone and BlackBerry z10. Bluetooth audio streaming from both, voice, emails and texts from my BB, full hands free with the unika kit, connects to my BlackBerry for Internet access, installed numerous apps plus full sat nav integrated with iGo or Tom Tom if you wish.
Will post a couple if photos later after I get home from work.