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The head gaskets were redesigned numerous times, maybe over a dozen times.
I don't know when the last design was completed, but I do know that it hasn't been redesigned for several years.
The last revision has metal inserts in the gasket itself, that lock it in in the block, which prevents it from moving.
Every technician I have talked to, including mine, has told me that they have never seen a leak from the latest gasket.
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Paul S.
2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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