Many Mercedes Benz SUVs come pre-wired for easy brake controller installation
Large trailers, like travel trailers, typically require a trailer brake system. A trailer brake controller is required to operate most trailer braking systems. Some vehicles come equipped with brake controllers and some do not.
Our 2012 Mercedes Benz with the factory towing package does not have a factory trailer brake controller, but is pre-wired for easy installation of a aftermarket brake controller, like the Tekonsha P3 90195 that we planned to use. Here is a quick review of the install.