The first summer I had my e300d, I fought the same issue. Had it towed 3-4 times and killed a starter before I found the air leak. Mine was on one of the plastic fuel lines going into the shut-off valve. I think I paid $20ish for a full set of viton o-rings

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Jake
1999 e300d PlantDrive WVO/SVO conversion
**note to self: oil changed at 268k kms**
1990 Toyota 4Runner FrankenDiesel swap

snookwhaler,
Amfo is a cheaper alt to a stick of what you wanted!! We have used it for removing a few stumps here. You already have one of the 2 main ingredients in your fuel tank. The other is a common fertilizer. Be careful if you are going to play with that stuff though, it doesnt say excuse me !!! & there may be a law against it where you are.

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving