How do I program my Audi A4 key?

I recently purchased an Audi A4 and need to program my key to use with the car. Can anyone provide step-by-step instructions on how to do this?

First, locate the program button on your vehicle's keyless entry system. Then, insert the key into the ignition and turn it to the 'on' position. Finally, press and hold the program button for 10 seconds.

You can also refer to the owner's manual which provides detailed instructions on how to program your key. Just look for the 'remote control' section.