Why does the GLC always make noise when braking?
2 Answers
There are generally three reasons for the GLC's braking noise: 1. Normal ABS intervention: The sound produced when the ABS system is functioning normally. 2. Insufficient friction: Noise caused by newly replaced brake pads not being properly worn in. 3. Excessive wear: Noise resulting from excessive wear between the brake discs and brake pads. Below is an introduction to related content: ABS working principle: The Mercedes-Benz GLC is equipped with an ABS anti-lock braking system. Its working principle involves a cycle of locking and releasing, keeping the vehicle in a critical state. In this situation, sudden braking will trigger the ABS to intervene, producing abnormal noise, which is considered normal.
I have a lot to say about the brake noise issue with the GLC! My car started squeaking just six months after purchase, and I made three special trips to the 4S store. The mechanic said the main reason was that the brake pads were too hard, made with a high-metal-content formula, which tends to produce high-frequency vibration sounds when rubbing against the brake discs. It was especially noticeable on rainy days—when the rust on the brake disc surface was rubbed, it sounded like nails on a chalkboard. Another issue was that the chamfer design on the edges of the brake pads wasn’t smooth enough, making it easy for small stones to get stuck and cause strange noises. Later, I switched to ceramic-based brake pads. Although they were more expensive, they were much quieter. Now, they still make a few noises occasionally after washing the car, but it doesn’t affect safe driving at all—you just get used to it.
