Here is what I do when I need parts from the dealer. I go on Ebay and find a SLK320 and write down the VIN number and give that to the parts guy at the MB dealership. The MB parts guys usually will want a VIN number to look things up. Just about anythjing that can go wrong with a Crossfire uses the SLK320 parts. Or you can suffer at a Chrysler dealership and pay more for a part that has a Sticker with a Chrysler part number stuck over the MB part number.