What I'm saying is that your problem maybe electrical rather than fuel/air-related. I had the same symptoms on my 300E , and that's how I fixed it. But in your case might not be the same.
Just one more thing to check.

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Zorin

'88 Benz 420 SEL
'79 Porsche 911SC ('87 Carrera Engine)
'00 BMW 540 Sports Package
'99 Land Rover Discovery

86 300E - Manual (sold)
88 260E (sold)
84 944 (sold)