Summary:
300SEL 6.3 #1285 (1969 EURO version)
300SEL 6.3 #5346 (1971 US version project)
I stumbled upon the following Youtube video from Mercedes Maintenance today, and thought I would share:
https://www.youtube.com/watch?v=zya8HfR8WxI
1970 300SEL 6.3