I have a 1984 300D turbo diesel that has power to everything (radio, glow plugs, etc) but will not start. I turn the key to let the glow plugs heat up and as soon as the light turns off, I go to start it and nothing! I don't what it could be and all of the fuses are good still. I drove the car yesterday and it ran perfect, as always. Then today this happens. Any Ideas?