Your car is a Mercedes Benz SLK 320, It is on a R170 platform with an M112 engine. With the exception of the sheet metal skin just about any part for a SLK 320 will fit on the Crossfire. Go to an online Mercedes supplier and find your part there. It will be much cheaper if you want new; Many parts are available for less at a junkyard. There are also many suppliers of parts for our cars on ebay.