I just bought a 1977 450sl manual tranny only to find out it's really a euro 350sl with a 450 emblem on the trunk lid! At first I was angry but now I am finding that it is quite rare and that is how/why I found this forum. I am trying to find out more about the engine (116 984 10000376) Does anyone know how these numbers break down? I know 116 is basically the block but what is 984? The first "10" following that indicates gasoline and manual shift and the rest is serial number... but what is 984?