I have an interesting problem with my 1988 560SL dash. The gauge needles in the instrument cluster on the left housing (fuel/temperature/oil pressure gauges) go erratic, but only in hot weather. They will also click in unison with the turn signal when I apply it. In cooler weather, the gauges work fine. I then encountered a second problem last evening: the dashboard lights dimmed completely (but didn't go completely off) with a click and kept periodically clicking back on and off intermittently. I don't know if the two problems are related. Any help/insights/clues are greatly appreciated.