Originally Posted by WD40

Correct. You'll also need a Mercedes VIN to place an order with any Mercedes U.S. parts distribution center.
https://mercedespartscenter.com/part...z/SLK320/Base/
VIN for 2004 Mercedes-Benz SLK320: WDBKK65F64F309329 (high mileage) WDBKK65F24F301468 (low mileage) -- I always used the latter VIN.