I am in the final stages of restoring a 68 250SE, 108.014. I have a wire that I am not sure where it connects. Writing on the label I affixed to the wire has long since faded. The wire is green with a black tracer. One end is terminated to pin 4 on the voltage regulator the other end is terminated with a ring lug. I cannot find any reference to this wire in the Mercedes 108 shop manual either vol 1 for cars up to 67 and vol 2 68 and up. I am thinking it was on the + of the coil. Any ideas? Thanks