Why does my Mercedes C-Class make a whining noise from the engine?

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Why does my Mercedes C-Class make a whining noise from the engine?

A high-pitched whining o r grinding noise from the front of the engine in your C-Class could indicate a worn-out water pump bearing. This issue is not uncommon in Pakistan, where dust and inconsistent maintenance can cause premature bearing failure. If left unchecked, the pump could seize, potentially damaging the serpentine belt o r engine.

Talha Kyanii asked on 10 Oct 2025 18:06:08 pm

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Gari Master - on 10 Oct 2025 18:06:53 pm

A whining o r grinding noise from the engine bay usually points to water pump bearing failure. In Pakistan’s dusty environment, dirt and contaminants can enter the pump bearings if the seals are weak. Additionally, infrequent coolant changes o r use of poor-quality coolant can lead to bearing corrosion o r lubrication failure. Once the bearing goes bad, the pump may seize o r break apart, possibly damaging the serpentine belt. Its best to replace the pump immediately upon hearing such noises.