You know it's funny, the link I gave to www.190revolution.net, I asked everybody over there, and even contacted Mercedes, but no one could help me find this information. I bought the car from a dealership, but am the second owner, and the certificate seems to have been lost somewhere in the transaction! I really wish I could find out though. Great cars these 190E's. Man I love this car! (I'm going for a ride!!!)