Folks, I'm really stumped and hope someone can help me solve the high idle problem on my 380SL. It's idling between 1500 and 1800 rpms. One solution already tried involved replacing the overload relay--behind the kick plate, on the passenger side, next to and above the fuses. When removed, the idle drops to 1500. I found, with either old or new relay plugged in, the rpms are 1800. And, by the way, this problem has not come overnight; rather, it has grown from 1400 on the high end and 1100 on the low (regarding putting in and pulling out the overload relay, respectively). The goal, of course, is to idle around 650. I've lubricated linkages and so forth and can eliminate binding. I've also verified all the fuses are in place and operational by testing with a light. Finally, the cruise control isn't working--in case there is some connection or relationship. FYI, the cruise engages momentarily, but then cancells, which really isn't an issue for me as I've little interest in using it and will solve it in due time. Nope, I'm focused strictly on getting the idle down where it ought to be and would greatly appreciate input toward that end. I'm truly puzzled and seek help.