[Warm Tips]: Some car models need an extra fiber optic loop adapter even more. If it doesn't work after installating please confirm your original car comes with the original car navigation, satellite box and CDC or not. If your above compatible vehicle has the factory navigation or amplifier system (for JBL BOSE Harman Kardon, etc.) installed, you need bypass these amplifier with the fiber optic decoder. The MOST box is for Mercedes-Benz ML(2005-2011), for Mercedes-Benz GL(2005-2011), for Mercedes-Benz R(2005-2011), for Mercedes-Benz E(2009-2012), for Mercedes-Benz CLS(2009-2012), for Mercedes-Benz SLK(2009-2012). It is compatiable with android radio and window CE stereo for Porsche 911(2005-2012), for Porsche boxster(2005-2012),for Porsche cayman(2004-2012). Decode for Bose Harman Kardon with optical interface. This optic fiber decoder box will keep your original car's optical fiber amplifier or for Harmon Kardon system or for Bose sound system work.Reduce installation fee,easy to install. All cables just need to be connected in front.