Army, thanks for sharing! That's going to be helpful since I am about to need new tires and given my recent change I sure don't want to get anything to make the ratio higher.
Barry, I assume you're talking about the lift pump. I see where the part numbers are different on the 616 and the 617. Is there that much difference between the two as far as output pressure? Is it a direct replacement? I had removed the relief valve spring and stretched it to the length recommended on the forum (I think you were a heavy contributor to that thread) some time ago. I don't have a pressure reading on my lift pump discharge though so it's hard to quantify the results. I had considered adding an electric pump back by the tank to push fuel to the lift pump. I have read about others that did this with good results.
And you're not kidding about most owners wanting the most out of the 240D. They are not powerhouses to start with and any incremental change (for better or worse) is very noticeable.
Thanks again.

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1983 M-B 240D-Gone too.
1976 M-B 300D-Departed.

"Good" is the worst enemy of "Great".