I towed a 2001 Jeep Grand Cherokee Laredo with our class C motor home and had plenty of power with the V10. You will want some type of brake system in the Jeep though, as that 5500 pounds will push the motor home when you try to stop.
We have had similar problems with out Coachman 345BHS.
The kitchen sink fell out of the opening because there were only two screws holding it in place.
The kitchen sink drain was plugged and would not drain.
The fridge wouldn't work on propane because the propane hose was kinked.
The Cub couch...
I was so disgusted with my RV dealer I canceled my extendted warranty plan with them. Nothing but broken promises from my dealer.
After I canceled my warranty they wanted to be my best buddy and do what ever they could to solve the problems...too late.