1994 Mercedes Benz E250

Engine Performance problem
1994 Mercedes Benz E250 6 cyl Two Wheel Drive Automatic 168000 miles

Hi, I have just bought a 94 E250d, lovely car, 1 small fault. The heater warning light does not come on until the car is up and running. The glow plugs are obviously not working, as can be seen by the smoke on start up. Whats not working correctly, what does it look like and where is it, very best regards Les.
May 18, 2009.

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