i have Ml 350 (2003), with ongoing pedal accelerator sensor issues. have exchanged twice the pedal sensor unit and more recently the throttle motorized housing unit. runs perfectly for 3 weeks then looses power and only the motor idles untill engine fault is cleared. Diagnostics indicate the voltage stored difference between signal 1 and signal 2 of component B37 accelerator pedal sensor is implausible. Accelerator stored pedal signal 1/short circuit to ground potentiometer below minimum value or defective