I've got an '82 240D that I just bought (4 speed) yesterday. I suspect the Glow plug relay is bad. The dash light won't come on but I'm getting voltage at each glow plug. Also, when I pull the 4 pin connector on the relay and bridge the number 3 and 4 (or is it 2 and 4?) connectors, I can get the dash light to come on. The car is having lots of trouble starting. I don't think the plugs are heating up at all. Once it's warm, the car starts without a problem. I also just adjusted the valves.

Anyway, I suspect it's the main glow plug relay but before I drop the coin on a new one, is there a way to test it?

Thanks,

Scott

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Scott
1982 Mercedes 240D, 4 speed, 275,000
1988 Porsche 944 Turbo S (70,000)
1987 Porsche 911 Coupe 109,000 (sold)
1998 Mercedes E300 TurboDiesel 147,000 (sold)
1985 Mercedes 300D 227,000 (totaled by inattentive driver with no insurance!)
1997 Mercedes E300 Diesel 236,000 (sold)
1995 Ducati 900SS (sold)
1987 VW Jetta GLI 157,000 (sold)
1986 Camaro 125,000 (sold - P.O.S.)
1977 Corvette L82 125,000 (sold)
1965 Pontiac GTO 15,000 restored (sold)