My 1999 e300 TD has refused to start !!!!! please help . The glowplug light stays on and the car does not fire. turns over well, now befour this took place the glow plug light would go off a bit late , and some times come back on . but since yesterday she wont fire at all and the glowplug light stays on permenently.

Please help i am desperate .....

thanks to all in advance