Why is my Audi A6 making a grinding noise when I apply the brakes?

I have noticed that when I press on the brakes, my Audi A6 makes a loud grinding noise. What could be causing this issue and how can I fix it?

The grinding noise could be due to worn brake pads or rotors. You should take your car to a trusted mechanic to inspect and replace them if necessary.

Another possible cause could be a brake caliper that is not functioning correctly. Have your mechanic check for any caliper issues and replace if needed.

It's also important to make sure your brake fluid is at the correct level and not contaminated. Have your mechanic flush and replace the brake fluid to see if that resolves the issue.