Greetings Kerry,

Not all glow plugs prior to '81 were series. I owned an '80 300TD that used the same parallel set-up I have on this '84 300SD but the timers are different. For the newbie's I'd say for them to look to see if there is an interconnecting solid wire between the glow-plugs to distinguish them as a series verses parallel system that has none. Parallel systems contain a seperate wire from the timer for each glow-plug.

Thanks,

Charles

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"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan