Are you saying none of the glow plugs worked? Thats pretty hard to believe? Are you sure you had good connections when you tested them? Just for grins test the new ones when they come in so you will know for sure. The light only stay on for the duration that the car (temperature dependant) thinks it needs to start. The glow plugs actually glow for about 30 sec. I'm just repeating what I think I read on here. Good luck. Thanks

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83 300D 227,xxx miles, sold
86 300 SDL 130,000 miles, sold