Hello, thanks to everybody and excuse me for my delay. I have been very busy just for this matter of the chassis number. I wrote to Mercedes-Benz, I wrote to RDW,(it is a public car register in Holland, where I have bought the 230SL) , running here and there to try to resolve the problem and now I'm anxiously waiting their answer. I already asked the old owner but he said that when he bought the car was like it is now, he does'nt change the chassis number and he does'nt know anything about it. He says , and in some way he is right, that the documents are OK . The problem is up to me, because, to register the car in Italy, I need a technical data paper from the Mercedes and I don't know what they will do with that chassis number. Yes, Cabrioletturbo, it is a great driving indeed . And thanks Tyler S. , I surely will look for any number everywhere and it is a good suggestion, Pawel 66, to have a look also at the number of the colour plate. Surely I'll do all these things. Thanks to everybody , I'll let you know how the thing proceeds.