Actually the R230's are all 2003's. About the only 2002 SL's were the Silver Arrow Editions (last of the 129's). But yeah, the 72 350SL/73 450SL is what I was kidding about.
They didn't really "come out" with the 450SL, the 1972 US 350SL actually was a 450. But they didn't call it that until 73. Never have heard a good story on why they did that, I should look it up in my MB history disc