Why does the Mercedes GLK260's brakes make noise?

[VonGideon]

There are many reasons for brake noise in the Mercedes GLK260, such as: excessively hard brake pads, brake pads worn down to the backing plate, excessive wear of the brake disc or brake drum, rust on the brake caliper, etc. Below are the specific reasons: 1. If it's a squealing noise, first check if the brake pads are nearly worn out (the wear indicator is making noise). If they are new pads, check if there is any foreign object caught between the brake disc and the pad. 2. If it's a dull noise, it is mostly an issue with the brake caliper, such as worn slide pins or a fallen spring plate. 3. If it's a hissing noise, then there could be multiple issues: the caliper, brake disc, or brake pads might be problematic. If the noise persists, first check for any dragging brakes, as poor caliper retraction can cause prolonged friction between the disc and pad, leading to noise under certain conditions. Also, check for any foreign objects stuck between the pad and disc. If the pads are new, inspect the brake disc for grooves, as localized friction can cause noise. If the disc is fine, consider whether the brake pads are too hard.