I read a post from a guy with a 1983 300D, 215,000 miles, with all original glow plugs. 27 years and all those miles....that's pretty impressive.

Which brand of glow plugs do you recommend?

Any others with that kind of glow plug longevity?

I replaced all five in the 92 about five years ago with 175,000 miles on it. Last year, in my first year of ownership of the 91, I replaced four of the five with only 80,000 miles on it. I guess the previous owner made lots of short trips.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 179k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 77k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife