Why does the Mercedes-Benz B200 make a humming noise when running?
2 Answers
The abnormal noise from the Mercedes-Benz B200 while running is related to issues with engine oil, belts, and water temperature. Engine oil aspect: If the engine oil viscosity is too high, it can cause problems with engine operation, reduce lubrication effectiveness, and result in louder engine noise. It is essential to promptly visit a repair shop to check if the engine oil needs replacement. Belt aspect: Check if the belt is loose. A loose belt can lead to increased noise in the engine compartment. Water temperature aspect: Overheating can also cause abnormal engine noise. Check if the temperature gauge is normal and if there is any smoke coming from the engine compartment. Remember to replace the coolant before winter.
I used to drive a Mercedes-Benz B200, and this kind of humming noise is quite common—it’s mostly related to tires or wheel bearings. If the tires have uneven wear or the pressure is too high, they’ll produce a humming sound at high speeds, which can be really annoying. If the wheel bearings are worn or aged, the noise will increase with speed, and this is especially noticeable in Mercedes-Benz vehicles. Additionally, differential issues or a loose driveshaft could also cause similar noises, so it’s worth checking the rear wheel area. My suggestion is to test-drive on a flat road: if the noise only appears at high speeds and not at low speeds, focus on the bearings. If the humming is accompanied by vibrations, it might be due to unbalanced tires, and a wheel balancing service should fix it. Regular maintenance can prevent these issues, but it’s best to get a professional diagnosis as soon as possible.
