Don't know what is all the problem about matching numbers matching our the data cards. I think that the large auctions on TV (Berrett's, Mecum"s), that's all you hear, "the numbers are matching". Mind you that these cars are Vetts and Mustangs. I did see a 300SL Gullwing on the auction block (Berrett's) and nothing was said that number's matched. I think it's all about money. I think when sellers have numbers matching, then they assume they will get more money for a "more" perfect example of the original. To me a perfect example is a car that has had a perfect restoration based on available existing parts. Are we looking to make money on our SLs or are we wanting to enjoy and preserve the W113 for our next generation. Mine 1970 280SL - Euro specs, has all original numbers as on the data card, in fact, if you want to talk numbers, when I replaced the leathers of by interior, I noticed that the factory had stamped the car's VIN number on the back side of each of all the leather pieces (i.e.. dash, seats bottoms and backs, foot well panels, door panels, soft top boot cover etc.). This was done at the factory to assure that the cuts of leather was for the correct body that was being pushed down the line, based on the order/data card. Since these pieces were machine cut but inserted/glued by hand, each piece was additionally cut when gluing to assure a perfect fit. When I installed my new leathers, I also made a stamp to match the original stamp with VIN number, to also stamp onto my new leather pieces. (This process was presented by me in the tech session held at PUB 2009). Matching numbers to me only mean that they are one piece of the puzzle of the history of our W113s.
Bob