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Trailer Break Control Installation for Tekonsha Prodigy P3 on 2019 Mercedes-Benz Sprinter 3500


Where is the trailer brake control plug located?


Expert Reply:

According to my research, if your 2019 Mercedes-Benz Sprinter 3500 came with a factory 7-way trailer connector you will have the brake controller connector pre-wired. This pre-wired connector should be under the driver side seat which you can see in the attached photo. The connector is green with four pins inside.

Once you locate this connector you can install the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 using the Tekonsha Custom Wiring Adapter for Trailer Brake Controllers part # 3063-P. The Prodigy P3 is one of the best brake controllers on the market, because it is a proportional controller with integrated safeguards for protection and an easy to read LCD display. After you plug the controller in and mount it to your dash you will be good to go.

If you cannot locate the connector or for some reason your vehicle was not equipped with one I can assist you with hard wiring the Prodigy P3 yourself.

You might also like the Curt Echo Mobile Trailer Brake Controller part # C51180 which does not require any hard wiring at all.

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