How do I program remote garage door button in a 2002 Mercedes?

To program the remote garage door button in a 2002 Mercedes, first, ensure the garage door opener is compatible with the vehicle's system. Turn on the ignition and press and hold the desired button on the garage door opener in the car until the indicator light begins to blink slowly, then release the button. Next, press and hold the button on the garage door remote while simultaneously pressing the programmed button in the car until the indicator light blinks rapidly, indicating successful programming. Finally, test the button to ensure it operates the garage door.