Circuit Breakers — General Information (Mercedes-Benz M-Class W163)

Circuit breakers are used to protect components of the on-board electrical system such as headlights and electric motors for window lifters, door lock actuators, etc.

On some models, the circuit breakers automatically return to their original state after being triggered. If the overload that caused the circuit breaker to trip was not episodic, the condition of the corresponding circuit should be checked without delay. After the fault has been eliminated, the circuit breaker will return to normal operation. Sometimes, the circuit breaker must be returned to its working state manually after the cause of the overload has been eliminated.