I checked on the U-Haul site to see how much a trailer hitch would cost for our new 2015 Murano and was told that U-Haul doesn't have one yet, but would make me one for free, including installation. All I have to do was to deliver my car to their research and development facility in Tempe Arizona and leave it with them for three days!
I guess this is how they develop trailer hitches for new cars. They wait until someone is willing to lend them a car for a few days, then figure out how to manufacture the hitch, and then late make it available to their dealers.
This is not practical for me as I am in Canada, but for anyone who has a 2015 Murano in the Tempe area, this sounds like a good deal.