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Parts Needed to Add 7-Way to 2012 Mercedes Sprinter For Brake Controller  


Hello i have 2012 sprinter 3500 Was looking to add the trailer wiring but not sure which one i need. Im looking for 7way and looking to add a brake controller as well what do you guys recommend for my vehicle. I was looking at P# 118650 ? And P#ETBC7 but not sure if this is correct. Thank you for the help


Expert Reply:

You are 100 percent correct with what you need to add a brake controller to your 2012 Mercedes-Benz Sprinter with the 4-way and then 7-way:

- T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118650

- Universal Installation Kit for Trailer Brake Controller # ETBC7

You will first install the 4-flat, which will activate your trailer's lighting functions, and you'll then plug that into the 7-way that comes with the # ETBC7, which also gives you the wiring, circuit breakers, and rest of the hardware needed for installation. Then for a brake controller to go with it I recommend the following:

- Curt Assure Trailer Brake Controller with Dynamic Screen # C49UR

- Wiring Adapter # C51515

I highly recommend the Assure because it will give your trailer smooth braking proportional to that of your Sprinter so you have a more comfortable, safe towing experience. Along with that, the Assure stands out because of its large OLED screen that makes it really easy to use and understand. It also has continual diagnostic checks with safeguards to prevent battery drain or shorts.

expert reply by:
Kyle S

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