Ronald,
Welcome to the clubs...both ownership and the group! When you have the chance, try the search tool for some of the questions that might come up. Of course, feel free to post too of you dont receive the answer you are looking for. I personally have never heard of a US car registration office here as registration is typically a function kept at the State as opposed to Federal government level. Further, historical "tracking" by VIN is relatively new here and our VIN numbers simply have too few characters for the system.
For some interesting details about your specific car and how it was delivered, search "Data Card" using the search tool.
Best of Luck with your SL. Interestingly our VINs are only 74 apart!
Kevin
PS: If I am incorrect on any of the above, someone will correct me for sure!