How do I reset the tire pressure light in an Audi A4?

I recently bought an Audi A4 and the tire pressure light keeps coming on even after I've filled the tires. How can I reset the light?

First, make sure the tires are all properly inflated. Then, locate the tire pressure reset button on the dashboard, usually near the steering wheel. Press and hold the button until the tire pressure light flashes, then release. The light should turn off after a few seconds.