How do I program the key fob for the Audi A1?

I bought a used Audi A1 and the seller didn't include the manual or any information on how to program the key fob. Can anyone provide step-by-step instructions?

The first step is to insert the key into the ignition and turn it to the 'On' position. Then press and hold the 'Unlock' button on the key fob for 5 seconds. When the LED on the key fob starts flashing, release the button and press the 'Unlock' button again. The key fob should now be paired with your Audi A1.