I go to start my car this morning and of course it would not start. I immediatley knew it had to be the Glowplugs. It would crank and crank and crank, but it wouldnt fire up. I couldnt test the resistance at that moment (because I was already late for work), but I got home today and checked and found 4 out 5 bad with readings of close to 2 Ohms. The thing is I replaced all 5 and the relay at about this time last year (~7,000 miles ago). All Bosch equipment. Why would they die so fast? A slight short somewhere? I thought it was peculiar a month or two ago when it was still relativeley warm and my car was rumbling a bit more on start up than it should have been. Shame on me for not testing earlier, but I honestly did not expect them too be bad so soon! I cant figure it out...Could my experiments earlier this year with the millivolt method have had anything to do with this ( i dont think so)?

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1983 300SD White with Grey interior