1 SET Car D2B Optical Fiber Decoder Adapter for Mercedes-Benz S/SL/C/CL/CLK/E/ML
D2B Wake up Connect to Car D2B Wake Up. ※D2B Optical Bus System. ※The adapter is a plug and play adapter required for vehicles with the fiber optic audio system. ※When installing the XTRONS Decoder Box, ensure the fiber optic signal loop is unbroken.