Brake Controller Recommendation for 2014 Mercedes ML 350

Question:

I have a 2014 mL 350 Mercedes blue tec, I have a factory install oris hitch with a pollak 7 way blade socket, the socket only power up 3 blades left and right directional, brake lights and running lights/ what do the I need to power up the electric brake on the trailer, can I use the same pollak socket ? or use a RF brake control ? what would you recommend ? and what parts would I need to purchase ? also the travel trailer has some led lights ? need your help

asked by: Ed M

Expert Reply:

First let's start with a brake controller. I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to setup.

Next, for a wiring kit to install the brake controller and the 7-way of your vehicle you would want the Wiring Kit for 2 and 4 Brake Electric Brake Controllers # 5506. This will provide the power source and ground for the wiring for the brake controller. You will need to test the wires from the brake pedal switch of your vehicle to find a circuit that has voltage when the brakes are applied and none when not applied. This will be the circuit you will run the red wire to.

Finally you will need to run a length of 10 gauge wire (part # 10-1-1) from the brake output circuit of the controller to the brake output circuit of the 7-way (blue wire). The # 10-1-1 is sold by the foot so you will need to order a quantity of the amount of feet you will need.

expert reply by: Jameson C