2005 E500 Mercedes Garage Door Opener

I tried to follow reset procedure from the instruction book i e.
2005 e500 mercedes garage door opener. Step 1 make sure there s adequate clearance for your garage door or gate to open and make sure you have access to your garage door opener. How to program garage door opener. Your mercedes benz c class comes equipped with a nifty homelink feature. Hold the buttons pressed for at least 20 seconds.
Turn the key to ignition then hold both outer buttons for 20 30 seconds but nothing happens the little light to the left of the buttons stays off at all times. Learn how to program your garage door opener for a rolling code device. What this does is that it will clear all previously programmed garage door from the memory of your mercedes benz. These instructions on how to program your mercedes benz garage door opener will walk you through both fixed and rolling code systems.
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. Folks how do i reset the code 232 garage door opener on e320 my 2005 please.