Why are the brakes on my Audi A4 squeaking?

Recently, I've noticed that the brakes on my Audi A4 have been making a squeaking noise. It's not constant, but it happens more often when I'm applying the brakes at slower speeds. What could be causing this and how can I fix it?

The most common cause of brake squeaking is due to brake pads wearing down. Make sure to have your brake pads checked and replaced if necessary by a certified mechanic. It's also important to regularly clean and lubricate the brake components to prevent squeaking.

Another possible cause of brake squeaking could be a build-up of rust or dirt on the brake rotors. Try giving your car a thorough wash and see if the noise improves. If not, it may be time to have your brake rotors resurfaced or replaced.