· Coupe/Convertible Forums Moderator
CURRENT: 2011 SL550 FORMER: C300, ML350, CLK550 Cabriolet, C240, ML320, 300TD
The wear sensors on the pads turn activate by completing a circuit to ground. Maybe there is one with some worn insulation on the wire that is contacting ground? You could check that by unplugging the sensor leads to see if it still happens. If itâ€™s not the pad sensors, then it must be the fluid level sensor in the reservoir. Maybe itâ€™s defective?