Thanks for the response, what exactly is an insert sleeve? From looking at the above pictures, I know it's just a guess but would you say these are the correct seals?

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1976 Mercedes 240D (Sold)
1985 Mercedes 300D Turbo Diesel: 500,000KM
1986 Mercedes 300E (Sold)
1988 Mercedes 300E (Sold)
2002 Mercedes C240 (Sold)
2008 Mercedes C350 4matic

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