What is the reason for the Mercedes-Benz C200L electronic water pump not working?

[RobertMarie]

Mercedes-Benz C200L electronic water pump not working is caused by the cooling tank being too tightly sealed, and it can be resolved by bleeding the system. Method for bleeding the Mercedes electronic water pump: First, open the radiator cap of the electronic water pump, then turn on the car's ignition switch, set the air conditioning to heating mode at the highest temperature, and adjust the fan to the lowest setting. At this point, the water pump will start working. After letting the pump run for a while, the air will be expelled. Precautions for bleeding the Mercedes electronic water pump: It is important to note that bleeding must be performed when the engine is cold. Never open the radiator cap or drain valve when the coolant is at a high temperature to avoid burns.