This is a remanufactured OEM head unit for a 2007-2009 Mercedes W221 S550/S450. It includes a CD player, navigation system, and 6-disc changer. The unit is black and fits directly into the center/front of the vehicle as a direct replacement. It is manufactured in Germany and comes with a 6-month warranty from the manufacturer. The part number is 2218700793 and it is compatible with various other part numbers listed in the aspects.