Also be aware that the posts are two different sizes and if someone has replaced the clamp in the past, it may not be the right size. Making the gap wider, as Ben did , will take care of it.

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