Product link:http://www.seicane.com/aftermarket-oem-mercedes-benz-b-class-w246-head-unit-stereo-sat-nav-system-with-8-inch-touch-screen-usb-sd-ipod-canbus-aux-srd-8848-1 .This is Mercedes Benz W246 audio system,it is a great product.it supports rear view camera,automatically switching to rear camera when revese the car.in addition,We adopt the latest 800MHZ ARM11 processor to develop high performance multimedia car dvd with the functions of GPS navigation. audio&video. entertainment and etc.other features:steering wheel controls.Dual zone function.Real time clock function.they are useful.