This is a Euro spec car. D-jet was not used in the US, although it might have been in Canada, that's why you get the info you get. No mechanical injection in the W114 chassis, either.

Fuel pump should run about 1 sec when ignition switched on and when starter is engaged or engine running. Fuel injectors must click when cranking even if it doesn't start.

Sounds to me like it's running on the cold start valve only -- fires, dies, does it again for a while, then eventually won't even sputter -- let is sit a while and it will again start briefly. That means no injection.

You can test the trigger points with an ohmeter if you pull the dizzy -- which I would on principle to clean the trigger points with brake parts cleaner. Make sure whatever you use doesn't contain methylene chloride or it will melt the plastic covers on the points and possibly the rubbing blocks, too! Flush out all the oil and verify that the points make contact as the dizzy turns. the oil will prevent them opening and closing cold, no effect hot. Worn rubbing blocks will require new points.

Another spot to check is the ground for the injectors and control box -- not sure where it is on the W114 chassis, but it's on the right side firewall on the W108. Big nest of brown wires, and if the connection is corroded, no injection.

If the car hasn't been driven for quite a while, drain some gas and check condition -- if it reeks of stale gas, drain it all out and replace with fresh and jumper the fuel pump relay (can't tell you the location unless it's on the ECU bracket, in which case it will be the bottom relay) and let it run a while to flush all the goo out. With any luck, it will run then.

Pete

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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!