unfortunately their CAN Bus converter only works with QP and there is not an immediate plan to make one available for M138...kbrookings said:...How it works: A company called NAV-TV (http://www.nav-tv.com/) cracked some code and made a box that gets directly into the nav screen electronics and stereo preamp. Don't have a part number but it says Nav-TV Corp Optical on the box and MAS VIM is written on the side. There is an adaptor needed, in the case of the QP system just MAS is written on the side of that box. Its not the car that matters its the maker of the Nav Screen and attached electronics. I'm told they have an adaptor and software for every screen type...