Okay, I searched but my thread was more about my alternator being bad than the glow relay being bad although I did mention it.

I had forgotten that I hypothesized that my GP relay coming on randomly took out my alternator. I also found other people with the same problem (GP light flickers).

I would suggest you either replace the GP relay or troubleshoot the relay. One thing to do would be start the car, THEN disconnect the power lead to the relay and see if the flickering persists. If so then the issue is probably not GP relay related.

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2009 ML320 Bluetec
1985 300CD
1981 300TD

Past Mercedes
1979 300TD
1982 300TD
2000 E320 4Matic Wagon
1998 E430
1984 300SD
1980 300SD