1983 380SL IDles high, real high. Have tried several things from fuses to idle modules. But from reading the ignition swithch easy install kit, it seems the problem may be in the switch. When inspecting that area i discovered a wire spliced into the harness at the steering wheel. Placed a prob in line and it lights when starting the car. Also the heater blower motor is not functioning and the right side lights on high beam are out as well. I have no dash lights and the tach is not working.