My '95 C280, bought new, had both of those leaks which were warranty repairs. They did not occur again. The head gasket oil leak is at the right rear, typically. It's more of a seepage but I wouldn't put up with it. I saw the engine with the head off and would not tackle this job myself at all as long as my VISA card was useable. After the warranty, that is.

My C320's V-6 leaks NOTHING! Huzzah!

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Roger E.