body dl dt dd dl dt #product-desc #description #details .ui-box-title .ui-box-body #tbspecifics #tbspecifics tr #tbspecifics td D2B Digital Data Bus Car Stereo Fiber Optical Radio Decoder Amplifier Adapter Box For Mercedes Benz ML GL R E CLS Cla If there is no sound after installing the fiber optic box,Pls check it as following steps: 1. Confirm whether the power supply is connected well, measure with a multimeter, yellow --- battery power 12V, black --- ground wire, no need to connect ACC power supply2. Confirm whether the gateway signal is connected well, CAN-H, CAN-L3. In the optical fiber communication of the vehicle, all the optical fiber signals must be ableto communicate normally. Due to the damage of certain electrical equipment of the vehicle, the optical fiber communication is abnormal. At this time, it is neceary to short-circuit theoptical fiber signal of the damaged device, (common For example: 6-disc CD, telephonecommunication module, or directly install the optical fiber audio box to the caramplifier)Installation location: Behind the car audio screen host, or car power amplifier.Function: Convert external RCA audio signal to optical fiber signal, and transmit to the car amplifier through optical fiber. The sound came from the sound of the car. For example: For Mercedes-Benz E Cla Carton audio, when you need toreplace the car screen host, in order to retain the car amplifier, you canc.Name:Optical Fiber Audio Decoding BoxWorking voltage:12VApplicable models: For Mercedes Benz vehiclesFor Mercedes Benz 2000-2003 S/CL claFor Mercedes Benz 2000- E ClaFor Mercedes Benz 2003-2004 SLFor Mercedes Benz 2001-2004 C/CLKFor Mercedes Benz 2000-2005 MLMaterial: ABSPlease note: the product is only used for the old for Mercedes-Benz oblique fiber optic head, not suitable for square head!Colour:As ShownPackage Contents:1 x Fiber Decoder BoxOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.