Unbranded Black Automotive Electrical sku-16938317080

This Black Unbranded optical fiber audio decoder is listed under Automotive Electrical as sku-16938317080. The product title describes it as a MOST box amplifier adapter for W211 E and S Class vehicles. The supplied installation notes cover 4, the amplifier locations; 3, optical fiber communication; 2, the CAN-H and CAN-L gateway connections; and 1, the power supply check if there is no sound after installation.

For the power check, use a multimeter to measure the yellow battery-power wire at 12V and check the black ground wire. An ACC power connection is not needed. All the vehicle's optical fiber signals must communicate normally. If damaged equipment interrupts communication, its optical fiber signal may need to be bypassed.

Examples given are a 6-disc CD unit and a telephone communication module; the optical fiber audio box can also be installed directly at the original amplifier. The location notes place the W211 power amplifier on the left side of the trunk above the left rear tire and the W171 amplifier under the area in front of the front passenger.