Nice car!

I got mine (hence my username) with the carbs already setup and it ran perfectly but for the 250/8, a carb balancing tool really helped as did making sure there were absolutely no vacuum leaks and that the linkage did not preload one carb more than the other.

Michael

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Usta haves '69 250/8, '76 280C, 1971 250C 114.023, 1976 450SEL 116.033
Current have, 1983 300SD 126.120