I would bet good money its a mis diagnosis and its the EDS. I think you should take it to the dealer for diagnosis unless your indy has all the proper testing equipment.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

You think you can try to run the car on a spare bottle ( in close circuit, fed and return on the same hole)under the hood to see if the pump actually pump, this after changing the filter and cleaning the prefilter to be sure all is clean there.
A one litre can get you about 5 milres under heavy revs/ loads.

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E300TD year 2000. RUSTY SOLD
cost a fortune to maintain on the road
but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...