If you broaden your search in EPC to include more than just "North America" vehicles, you can see that the rubber o-ring was used in 5 and 6 cylinder diesels around the world. I wonder why it doesn't show up for North America versions of the OM617 (at least according to EPC)?

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).