| Wiring harness?
Has your car had the engine wiring harness replaced? It is one of those known to have a harness that bio-degrades before you have finished with it. I am not saying that this is necessarily your problem, but if it still has the original harness it may be. Sorry if I am the bearer of bad news. Search this and other forums for something like "W124 wiring harness" and "M104 wiring harness".
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Technical Officer, Mercedes-Benz Club (NSW) Inc. www.mbcnsw.org.au
107.023: 1973, 350SLC, auto, icon gold, parchment MBtex.
107.026: 1981, 500SLC, auto, thistle green, green velour.
124.090: 1990, 300TE, auto, arctic white, cream-beige MBtex.
201.028: 1990, 190E-2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 1990, 190E-2.3 Sportline, auto, signal red, black fabric (parts car, currently dismantling).
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