Sensor for the electromag clutch is the one on the valve cover, nearest to the front of the car, right?
Mine's 2 prong, and I swapped it out as soon as i discovered the burning wires. It cost me $15 Singapore Dollars and it's original Merc.
I'm trying to figure out whether I can isolate the clutch fan to see if fuse #10 still blows.
If I could only find those dang terminals...
Boy, is this gonnabe fun.
Btw, parts and service for the 201s and 124s are really cheap here because they are really common on our roads.