I just bought a Ezonetronics Android radio (https://www.amazon.com/gp/product/B074DW6ZRQ/ref=oh_aui_detailpage_o04_s02?ie=UTF8&psc=1) and are trying to install it to a Mercedes 2002 ML320. It has a Bose speaker system that is hooked up to the antiquated original car radio. What I was told was: The speaker output is fiber, but the radio input is digital. Anyone knows of an adapter or a way to proceed with the install? I live in Costa Rica and are completely clueless on radio installs, so ANY direction would be greatly appreciated. Cheers.