I also tow a 2007 Ford Edge. I installed the towing hitch myself, and it was fairly easy, Roadmaster brand.
I also installed my own braking system, a used cruise control motor taken off a junkyard Nissan, along with a couple of vacuume fittings, and check valves. Then I ran a vacuum line from the RV engine to run the power brakes and cruise control motor. When the 12 volts of the RV brakes come on, I energized a vacuum relay, that applied vacuum to the cruise control motor, pulling the cable and chain that was attached to the car brake pedal. It slows the car nicely, and worked well. Cost was nearly $35.
Fred.
Money can't buy happiness but somehow it's more comfortable to cry in a
Porsche or Country Coach!
If there's a WILL, I want to be in it!
I havn't been everywhere, but it's on my list.
Kangen.com Alkaline waterEscapees.com