How often should I change my Audi A3's brake pads?

I noticed my brakes starting to feel a little bit spongy and less responsive. Is it time for new brake pads? Is there a way to check if my current pads still have enough life left? Thanks!

Brake pads should typically be replaced every 50,000 miles or so, but it really depends on your driving habits. If you find yourself frequently braking hard or driving in stop-and-go traffic, you may need to change them more often.