Thanks for the confirmation. I thought from the wiring diagram that I got out this morning it looked like the bulb circuit was controlling the field in the voltage regulator. WHo would have thought? SO if the bulb burns out, you get a faulty charging system, nice. Oh well, I got the bulbs after breakfast and I am out to replace the bulb now. Too bad the instrument cluster is a hassle to pull, I am going to try my best to slip a blind hand up the back of the cluster and reach the bulb...maybe I can get my 5 year old to do it for me? Oh, well, at least the mystery is solved.

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Christopher Henkel
1990 190E 2.6 - Arctic white SOLD
1986 190E-16v - Blauswartze
1993 300CE - SOLD
2003 W208 CLK 320 Cabriolet - Magma Red