How do I reset the Tyre pressure light on my Audi A4?

I recently purchased a used Audi A4 but the Tyre pressure light keeps appearing on the dashboard. I've tried filling the tyres with air, but it still won't go away. How can I reset it?

To reset the Tyre pressure light on an Audi A4, first check the tyre pressure in all four tyres and make sure they are at the recommended levels. Then, locate the reset button on the dashboard and hold it down until the light flashes, indicating that it has been reset.

If the Tyre pressure light on your Audi A4 is still on after filling the tyres to the correct pressure, try disconnecting the car battery for a few minutes and then reconnecting it. This will often reset the dashboard lights.