What this does is that it will clear all previously programmed garage door from the memory of your mercedes benz.
Mercedes benz garage door pairing.
Some garage door openers may require you to exit the vehicle and push a button on the opener motor.
Now push the programmed button in the car for 2 seconds let go and then repeat it again until the garage door starts to operate.
Hold the buttons pressed for at least 20 seconds.
Hold your garage door remote up to the mirror and press the button on the remote and on the mirror simultaneously.
With the ignition still on exit the vehicle locate the learn or train button on your garage door motor.
When the light underneath the mirror flashes in green the pairing is complete and you re ready to go.
If you have programmed a garage door opener to your mercedes benz and would like to keep it skip this step press the two buttons on the bottom on the rear view mirror.
This is a video from mercedes on how to program your homelink garage door opener.