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Recommended 4-Way and 7-Way Wiring Harness for 2021 Mercedes-Benz Sprinter 2500

Question:

I need to add a 7-way connection to my 2020 Sprinter 2500. As far as I know this does not have a tow package. Will you let me know what I need to get? Much appreciated.

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Expert Reply:

In order to add a 7-way connection to your 2021 Mercedes Sprinter 2500 you will need to start by adding a 4-way connection. For a 4-way, I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118649. This plugs into existing wiring in the rear cargo area of your Sprinter.

Once you have installed the 4-way connection you will want to add the Universal Installation Kit # ETBC7. This includes the 7-way adapter and everything else you need to install a 7-way on your vehicle. The adapter has a 4-way and 7-way plug on the end so you can still use a 4-way if you need it.

I have attached some installation and review videos for your reference.

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Robin H

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