We tow a C Max with a Blue Ox baseplate and tow bar. Also have the Blue Ox Patriot brake box. The Patriot specifically states it works with a hybrid. Hooking up is quick and easy. Be certain to install a charge line from the RV to the car or the battery will die after about four towing hours. The installer needs to connect the charge line to the proper terminal. Our installer connected the line to the wrong terminal and the battery went dead after four hours. I took the car to my local Blue Ox dealer where they quickly diagnosed the wrong terminal issue, moved the charge line to the correct terminal and problem solved.
I bought the car at the end of March, 2013 and now have close to 31,000 driving miles plus over 5,000 towed miles. The car has been the subject of two safety recalls. Aside from that it has performed flawlessly.