John S.
Typically, service & repair records are the only way to know. Dealerships don't give up the info. I was lucky to find out because my car was originally sold in Italy and an Italian member on this Forum was able to acquire the ownership history from the Italian BMV. I don't think your New York BMV would do that. What history do you have, if any?
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420