This Fiber Optic(MOST) adapter allows you to retain the factory(Mercedes-Benz/Porsche/BMW) MOST amplifier audio system(Harman/Kardon or BOSE) when installing ANY aftermarket radios. The output from all speakers including subwoofer and premium sound quality. This makes for a nice clean easy install.

When installing this interface into your Mercedes-Benz/Porsche/BMW you must make sure that the fiber optic signal loop is not broken.  If you have other devices which can include original CD Changer, satellite radio, and telephone module they must stay connected so the fiber optic signal loop is consistent.

To identify if you have a fiber optics MOST factory-amplified audio system, you can check the vehicle in a number of ways. Some vehicles will have clear markings on the speaker grills indicating the presence of an upgraded audio system. You can also check with the original order notes/invoice from when the car was purchased from the factory, the upgraded sound system with an amplifier would show on the options list. If unsure, you can call your local dealer with your vehicles chassis number and ask them to check if the vehicle was manufactured with an amplified audio system. If you are not sure, please send the VIN and a photo of existing dashboard of your car to Support@soundlouder.co.za, we will help you to check.