What are the causes of brake noise in the Mercedes-Benz E300?
3 Answers
The causes of brake noise in the Mercedes-Benz E300 are: 1. Severe wear of the brake pads and brake discs; 2. Lack of lubrication in the brakes. Taking the 2021 Mercedes-Benz E300 as an example, it belongs to the mid-to-large-sized car category, with body dimensions of: length 5078mm, width 1860mm, height 1484mm, a wheelbase of 3079mm, a fuel tank capacity of 66 liters, and a trunk capacity of 486 liters. The 2021 Mercedes-Benz E300 features multi-link independent suspension both in the front and rear, and is equipped with a 1.5T turbocharged engine, delivering a maximum horsepower of 184PS, a maximum power of 135kW, a maximum torque of 280Nm, paired with a 9-speed automatic manual transmission.
Over the years of driving my Mercedes-Benz E300, I've encountered brake squealing several times. The main reason is when the brake pads wear close to their limit, they emit that sharp screeching sound, especially noticeable during cold starts or at low speeds. Another common issue is rust or dust buildup on the brake disc surface, which causes noise after prolonged parking in rainy conditions. Mercedes-Benz uses high-performance materials, and the brake pads contain more metal, making them prone to noise but offering excellent braking performance. Other possibilities include improperly installed calipers or poor contact due to oil contamination. While not a major issue, it affects the driving experience and hints at potential safety risks. It's best to check the brake pad thickness monthly. If excessively worn, replace them at an authorized dealership for around a thousand yuan, and have the technician clean the entire system to prevent minor issues from becoming major faults. Avoiding frequent hard braking in daily driving also benefits brake longevity.
Brake noise is quite common on the Mercedes-Benz E300. Start with the simple possibilities. I think it's mostly caused by foreign objects stuck in the brake pads or aging/deformation. Uneven brake rotors can also cause this - Mercedes' cast iron discs are prone to warping due to thermal expansion and contraction. Loose calipers or return spring issues are also common triggers. Damp, cold weather tends to worsen it, and driving immediately after washing when water hasn't dried can cause rust. If you're handy, you can feel the wheel hub for heat to check for sticking. However, Mercedes designs are precise - don't disassemble randomly. I recommend regular professional inspections using equipment to check disc-pad clearance and wear. When issues are found, use genuine parts for replacement as counterfeit parts are more prone to noise. During each maintenance, pay attention to cleaning brake components to extend their lifespan while saving money and hassle.
