Why is the engine sound of the Mercedes-Benz E300 relatively loud?
3 Answers
Mercedes-Benz E300 engine noise is often caused by the car not being serviced for too long, resulting in excessive carbon deposits in the engine. Timely maintenance is required, as carbon deposits can also easily lead to excessive fuel consumption. Carbon deposits: As old engine oil becomes thinner with use, carbon deposits accumulate more and more. Thin engine oil can easily lead to oil leakage, causing more carbon deposits and significant power loss. When new oil is added, the engine may not adapt to the oil viscosity immediately, potentially causing higher RPMs and resulting in louder engine noise. Poor sound insulation: If the engine sounds normal from the outside but the noise feels loud inside the car, it indicates poor sound insulation. The vehicle's sealing strips should be checked for signs of aging. Alternatively, improving the vehicle's sealing effect and then testing the noise level again is recommended.
I've been driving a Mercedes-Benz E300 for over two years now, and recently I noticed the engine sound has suddenly become much louder, especially when starting or climbing hills. The roaring noise is quite annoying. At first, I thought it was just the normal tuning of a luxury car, given Mercedes' high-performance engine design. But after taking it to the 4S shop for a check, the technician said the engine oil had been used for too long, reducing its lubrication effect and increasing internal friction, which led to the noise. After changing to new oil, it became much quieter. He also mentioned that small cracks in the exhaust system or a clogged air filter restricting airflow could also cause increased noise. He suggested checking the oil dipstick first—if it's dark, it's time for a change. If the issue persists, it's best to take it to a professional shop immediately to avoid minor problems turning into major ones and affecting driving comfort.
I was quite curious about the increased engine noise in the Mercedes-Benz E300 and looked into the reasons. The most common issue is related to engine oil - degraded or insufficient lubrication from old oil can lead to increased friction noise between engine components. A leaking or cracked exhaust system can also amplify the sound. Alternatively, blockage in the intake system, such as a dirty air filter causing restricted airflow, can make the engine work harder and produce louder noises. Another possibility is natural engine wear, where increased piston clearance generates vibration sounds at high speeds. I recommend starting with simple checks: examine the oil color and level to see if replacement is needed; try to locate the source of the noise (exhaust pipe issues are usually easy to identify). Addressing these promptly can prevent deeper damage, and regular maintenance helps extend engine life.
