In my 2010 Prius in the manual it stated that you shouldn't tow anything. But, I installed a hitch and hitch mount bike rack and had no problems. As many other Prius owners. When I went to the dealer to have any work done to it they never mentioned anything about it. I think just as long as you don't tow a trailer you should be okay, just use common sense. The CT is just too new to have a hitch out for it. I'll just have to wait. Hopefully one comes out soon before I purchase my CT. I don't want license plate screws indentions in my rear bumper.