I would also check the fuel tank strainer. Lots of crud can build up in a diesel tank.
Gary C

When I got my first benz it would run out of fuel with about an eighth of a tank according to the gauge. What was happening was that the fuel tank screen, which is about 2.5 inches high or so, was only open at the top. The side were coated in a thick black goo. Once I replaced the strainer I was able to run down into reserve without petering out. If there are black particles in your prefilter I'd be willing to bet you're having a similar issue. Get the black rubber bosch primer pump, best money I've spent so far.

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1985 300D Gretchen (Astral Silver) 220k
1983 240D 4-speed Evelyn (Orient Red) 203k


TANSTAAFL

Umm...I think this guy has probably taken care of his problem by now...

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1985 300TD-euro 352,000 mi
1974 240D (1?)52,000 mi - has a new home now

Haha....yeah, I was thinking that too. I saw it was resurrected the other day. I suppose it's a helpful bump for other newcomers though (well, those oblivious to the search function anyway).

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1981 240d - 135k - Arlene