Greetings group - I need some help with my 2003 C270cdi diesel. The engine turns over well but just won't fire or start. The only thing I changed in the engine recently was the air filter, and it has run well since then. Local ambient temperature is around 4 deg celsius. All fuses are fine, incl the 50-amp for the glow-plug circuit ( I presume). There is electrical continuity through the glow plugs, The car has covered 80,000 miles and the diagnostics says 'no malfunctions'. The glow plug light comes on and goes out as per normal.
The only thing I have been able to find that is puzzling me it there is electrical continuity between the supply to each glow plug and earth, and no volts at the supply in the starting cycle.
All advice welcome!!
John