What Causes the Squeaking Sound in Mercedes-Benz Brakes?
2 Answers
Mercedes-Benz brake noise is caused by issues in the braking system. If the car is new, both the brake pads and brake discs are brand new, and they are in the break-in period, which may result in noise during driving. Owners need not worry as this noise will automatically disappear after the break-in period. Below are the detailed reasons for brake noise: 1. Brake pad material issues: Most brake pads currently used are semi-metallic and semi-asbestos. If the metal in the brake pads is too hard, it can cause noise during braking. 2. Uneven brake discs: Brake discs may develop uneven surfaces during use. When the brake discs become uneven, stepping on the brakes can more easily produce noise. 3. Worn edges of brake discs forming protrusions: When new brake pads are installed, if they do not fully align with the brake discs, noise may also occur during braking.
I've driven a Mercedes for many years, and squeaky brakes are quite common. There are usually several reasons: when the brake pads are nearly worn out, the exposed metal lining can cause noise; or the brake disc surface gets rusty, especially after parking in the rain, making noise initially upon startup before fading away; sometimes small stones or dust get stuck between the pad and disc, causing friction; newly replaced brake pads may also squeak if the material is too hard or improperly installed. You can do a preliminary check yourself: try lightly pressing the brakes a few times after starting the car in the morning—if the noise reduces, it might be a rust issue; listen to whether the noise occurs at low speeds or persists at high speeds, with the former often caused by foreign objects or rust. For safety, don’t delay—visit a professional shop as soon as possible to avoid damaging the discs. Experience tells me that regular maintenance can prevent many such issues, so it’s good to check the brake thickness roughly every six months.
