I have been looking at various iPhone integration kits but have decided just to swap out my Audio 10 for My JVC KD R601 out of my old Golf as its fully iPhone ready and a far newer head unit. Does anyone know of any issues when fitting after market head units. I know i will need a new Single DIN Fascia to make it fit. Is there any kit i can buy to make the steering wheel controls work with the head unit or will i have to sacrifice them?? Any help much appreciated My Merc is a 2001 C320 for info.