How do I program my Audi A2 key to unlock my car?

I recently purchased a used Audi A2 and I only have one key. I'm worried about losing it or it breaking, so I want to program a second key to unlock my car. How can I do this?

To program a second key for your Audi A2, you will need to have the key and the car present. Insert the key into the ignition and turn it to the 'ON' position. Press the lock button on your original key, then immediately remove it and insert the new key. Turn the key to the 'OFF' position and remove it. Your new key should now be programmed to unlock your car.