I have a 2016 Cherokee, and just got the fix installed by the dealer. They insisted they didn't know anything about the issue; we even explained that we were shown by our sales person how to set it up to tow. After many calls to Jeep Corporate customer service, who then contacted the dealer and set up the service, it was installed at no cost to us.
When checking out at the dealer, the clerk said that he had seen several of these being installed there!
Warning, the battery on the car does die while in tow. We will now look at that issue