Trailer Connector Adapter w Lamp-Out Sensor Bypass - 7 ...
Yes, the Trailer Connector Adapter w Lamp-Out Sensor Bypass part # 20142 will help you receive a full/constant 12 volt signal from the trailer connector pins on your Mercedes Benz GLS550. The device has built-in load resistors that work to bring the correct voltage up to the pins on the trailer connector.
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