The link below will bring you to a source for Part no's and microfiche for Mercedes base vehicles. Just enter your VIN and click on Full Catalogue, Then go to the area.you are interested in.
http://benz.17vin.com/partsearch/A3104600401/Mercedes-Benz
http://benz.17vin.com/partsearch/A3104600401/Mercedes-Benz