What Causes the Brake Squealing in Mercedes-Benz?

[PaisleeLynn]

The reasons for brake squealing in Mercedes-Benz are: 1. During driving, particles such as rust enter the brake discs, causing friction and resulting in noise; 2. The car has not been maintained for a long time, leading to hardened brake discs that produce noise. The brake pedal is located below the steering wheel. Pressing the brake pedal activates the brake linkage, which applies pressure and transmits it to the brake pads on the brake drums, clamping the brake discs to slow down or stop the vehicle. Taking the 2021 facelifted Mercedes-Benz E-Class E300L Fashion model as an example: its dimensions are 5078mm in length, 1860mm in width, and 1480mm in height, with a wheelbase of 3079mm, and it is equipped with a 9-speed automatic transmission.

[DeDaisy]

My Mercedes occasionally makes strange noises when braking, which really makes me, a new driver, a bit nervous. From what I understand, it could be due to slight rust on the brake discs, especially common when starting the car after rain; or uneven wear on the brake pads, causing friction noise; foreign objects stuck in the pads, like small stones or dust; also, harder brake pad materials are more prone to noise at low temperatures; even loose system installation could be the issue. It's recommended to visit a 4S shop for inspection as soon as possible—don't underestimate such noises, as they might hide safety risks, like reduced braking performance affecting emergency stops. I usually make sure to regularly clean the wheel area to avoid mud and sand buildup, and during maintenance, I ask the technician to check the flatness of the pads and discs—after all, driving safety comes first.

[LeVera]

I've driven Mercedes for many years and have encountered numerous instances of brake noise. Common causes include uneven brake disc surfaces, especially when they rust after getting wet from parking; brake pads that are too hard or not compatible with new cars; debris caught between the pads causing wear; or uneven friction due to loose calipers. Another reason could be excessive deposits in the system that haven't been cleaned. Don't delay addressing these issues, as brake noise can easily damage other components, such as accelerating brake disc wear. I make it a habit to inspect the brake system every 10,000 kilometers to ensure the pads and disc surfaces are smooth and unobstructed. During rainy seasons or cold weather, I warm up the car for a few minutes beforehand to reduce initial noise. Safety comes first—if problems arise, going directly to a professional repair shop is the most hassle-free solution.

[OCorey]

The squeaky brakes on my Mercedes are a bit of a bummer. Young car owners love tinkering with their rides. Common issues include worn-out and hardened brake pads or small debris getting stuck; improperly calibrated aftermarket brake systems causing problems despite the cool upgrades; or oil stains and rust on the rotors. Better find time to get it checked—noise is annoying and could affect performance. Pay attention to brake pad replacement intervals during maintenance to prevent many headaches.