The electronic auxiliary water pump of Mercedes-Benz gl500 heater is broken.

The water temperature is too high, which is the most direct symptom. No matter whether the water pump is lost or leaking, the circulation of antifreeze will be blocked, which will affect the heat dissipation of the engine, and it is easy to give an alarm prompt that the antifreeze is insufficient and the engine temperature is too high. If the water pump leaks, a pool of water will be found under the car if it stops for a long time. The most common fault of most automobile water pumps is water leakage. The main reason for the leakage is that the seal is not in place, which makes the coolant penetrate into the bearing of the water pump, thus washing away the lubricating oil on the bearing and causing the bearing damage. This kind of leakage belongs to internal leakage. External leakage is also the main cause of water pump damage, including the aging of engine seals and gaskets, internal leakage of heaters, oil cooler leakage and so on.