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Dear Cap'tan Pete,
Good p.m. I have a further thought, which you might want to try first. Your car might have an RPM/Crank sensor: all gasoline/petrol-fired 940s have them. I think that 740s and 240s also have them. This sensor is located atop the bell housing, which connects the engine and transmission.
The crank sensor reads the rotation of the flywheel (gear-shift) or flex-plate (automatic). When the starter operates, the sensor signals the fuel pump to keep running. Without this signal the fuel pump does not run, so no fuel reaches the injectors. The engine will not start,for love or money.
At least, that how this device works on a gasoline/petrol-powered car.
If there's a crank sensor on diesel-fired models, you'll find it as follows. On the passenger-side of the engine, go to the back corner. Look down towards the ground. If there's an RPM sensor, it will sit right on top of the bell housing, just on the passenger side of top dead center. The wires run straight up and hook into the harness, on the firewall.
If there's a crank sensor, and it's the original, it may have been cooked by last summer's heat. It works when its cool. When it gets hot, it shorts out.
The total failure to crank is consistent with crank sensor failure. It is not an expensive part (about $40-50 here, probably twice that in France).
Hope this helps.
Yours faithfully,
spook
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