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Cross Posting from R63 Forum v.RearDiff Oil Analysis
While the R63 is a unique unto itself, there are several parts which carry over between other M156 powered cars. Figured y’all might like to see these Rear Diff Oil analysis results as well. This is the OEM, Original factory fill oil from MB...12 years ago and 100k miles. I’ll let the results speak for themselves. Happy motoring!!