When I got my Grey 82 it had 0 functional glow plugs, and we managed to get it started and onto a trailer.

The key is going to be warming the engine. plug the block heater in, start a fire under it, something along those lines. (WARNING: starting a fire under it may be a bad idea depending on oil leakage and such)

Whats your ambient temperature currently?

also, sometimes a little throttle helps, sometimes a lot helps or hurts, throttle by feel.

my dads 83 had frozen glow plugs, one broken off. started the motor and it blew them out quite quickly.

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1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion