Bad accumulator, next to the fuel filter or the pressure regulator. Pressure bleeds off and makes it hard to start.

This can be checked by monitoring fuel pressure --it should stay up quite a while if not indefinitely with the engine off. If it drops in 30 min or so, you need to either replace the fuel pressure regulator next to the fuel distributor of the accumulator.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!