In addition to the sizes above there are a few o-rings such as the one on the end of the fuel line going in to the top of the primary filter that are 15mm OD, 10MM ID, 2.5 MM thick or 9/16 OD, 3/8 ID, 3/32 thick.

Jay do you remember where your fuel leak was coming from? I'm chasing one on my car.

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'82 300D - Light Ivory, 2nd Owner (Back in the wind April 2013!)

'95 E300D - White, grey interior. (Suffering from stuck/broken glow plugs)

Deuteronomy 22:4-
"Thou shalt not see thy brother's ass or his ox fall down by the way, and hide thyself from them: thou shalt surely help him to lift them up again."