First, I would order the original "window sticker" from Mercedes. You need to provide the VIN and your current ownership papers. That will show you the original configuration and the port of entry when first sold and the "prep" center. Beyond that, Mercedes should also be able to provide you with dealer service records and recall, but obviously cannot provide information regarding service by independents. I recently had a print out of my '85 W201 from the dealer, to verify my qualifications for the 250KM badge.