Best Mercedes-Benz W251 autoradio audio system with bluetooth touch screen RDS USB SD

Best Mercedes-Benz W251 autoradio is worthy,Installation was super easy (plug and play),this autoradio support audio type with MP3/PCM/WMA, this audio system uses Sirf ARM11 High Speed CPU and bases on Wince6.0 Operation System,it is powerful, it uses 7 inch 16:9 800*480 digital high definition TFT LCD touch screen with good Operating experience, the biggest strength is bluetooth function, you can call out by touching the screen, it is safe when you are driving, in addition ,this audio system support USD SD function which allows you to store music or pictures, you can know more details about the head unit from http://www.seicane.com/in-dash-car-dvd-gps-navigation-stereo-for-mercedes-benz-r-class-w251-with-radio-tv-bluetooth-ipod-si-9306 .