How do I program my key fob for my Audi A4?

I just got a new key fob for my Audi A4, but I'm not sure how to program it. Can anyone provide some instructions on how to do it?

To program your key fob for your Audi A4, follow these steps:
1. Sit in the driver's seat and close all doors.
2. Insert the key into the ignition and turn it to the 'On' position, but do not start the engine.
3. Press and hold the 'Unlock' button on your new key fob, then insert the key into the driver's side door and turn it to the 'Lock' position and then back to the 'Unlock' position. Release the 'Unlock' button on the key fob.
4. Repeat step 3 for any additional key fobs.
5. Once finished, turn the key to the 'Off' position and remove it from the ignition.
Your key fob should now be programmed and ready to use!

If you're still having trouble after following the instructions, try this:
1. Disconnect the negative terminal from your car's battery for 30 seconds.
2. Reconnect the negative terminal and follow the steps again to program your key fob.
Sometimes this can reset the system and help with programming.