I setup the WDH with the Metris to tow our camper (~3600 lbs). Knowing that I would still need to add a brake controller, I cautiously took a short drive around the block to make sure the hitch was setup properly. I left myself plenty of stopping distance knowing the trailer brakes would be inoperable. To my surprise there was no feeling that the trailer was pushing the Metris when braking. In fact, it felt as though the trailer was dragging the Metris ever so slightly only when braking. In all of my research, there is no mention of whether or not there is an integrated brake controller so I assumed there wasn’t. I did some looking around the 7-pin connector and the diagram on the flip-up cover shows one of the pins is for electric brakes. Looking at the wires on the backside, there are 7 and 3 of them are a larger gauge. In my opinion the 3 that would require a larger gauge would be ground, +12 for battery charging, and electric brakes. I took some photos but it’s difficult to see all of the wires. There are definitely 7. 4 in a top row and 3 in a bottom row. I’m going to contact my MB dealer tomorrow and have them start investigating whether there is a brake controller.