I have installed and used this system on a few BMWs. It is sold by Joel Rapose, a wonderful person with whom I am proud to call a friend. Go to his website
These pages will give you an idea if you can and want to make the change. Don’t worry about contacting Joel, as he is a gentleman and will happily assist you in answering your questions. If you run into trouble with the installation, he will be there to assist you over the bumps.
Updated 1 Nov. 2019