How to Program a 2005 Audi S4 HomeLink

1. Sit in the driver's seat of your Audi with your garage remote and press and hold the two outer buttons on the Audi HomeLink system in the car. The HomeLink system is located on the center console; the two outer buttons will be the first and third of three buttons on the console.
2. Release the buttons once the LED light on the HomeLink system begins flashing and hold your garage remote 2 inches away from the HomeLink system.
3. Hold the 'Open' button on your garage remote while depressing the button on the HomeLink system that you want to program. Hold both buttons until the LED light on the HomeLink system begins to flash faster then release.
4. Press and hold the 'Trained' button on your HomeLink system and release the button once the LED light stops flashing. This will end the programming sequence.