Why does my Audi A4 make a grinding noise when I brake?

I recently noticed that my Audi A4 makes a strange grinding noise when I apply the brakes. It doesn't seem to affect the braking performance, but it's concerning. What could be causing this noise and should I be worried?

It's likely that your brake pads have worn down and need to be replaced. It's important to have this taken care of as soon as possible to prevent damage to your brake rotors. I recommend bringing your car to a trusted mechanic for a brake inspection and replacement if necessary.