Thanks for those details. I need to change out the rubber for my slightly older w115, but I suspect the overall design is similar. I have owned the seal for a while now, but haven't found the time to start. In other words, I am intimidated by the whole thing. Thanks for the advice and pics.

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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).