In response to a question I emailed Winnebago a while back I received this response. "Thank you for your inquiry and interest in Winnebago Industries. We are offering the four-cylinder Mercedes-Benz Sprinter Chassis on our View/Navion and Era products for 2015. We are putting a 5,000-lb. hitch on these chassis, just like the six-cylinder."
I guess we will all discover from the real world use of the smaller engine in these Winnebago/Itasca models whether the engines are sufficiently powerful. I'd still like to bring along a toad. I would imagine, using the 4-cylinder engine, climbing a steep incline in mountainous areas, I might have to unhook the toad and while I or my spouse might drive it, the other one of us will drive the RV.
BClemens, thanks for your insight.
BTW, who comes up with the tow ratings (e.g., 5000 pounds), the chassis manufacturer, the RV manufacturer, or some government agency? I find it weird that all other Sprinter chassis-based RV manufacturers use the 5000 weight while FR doesn't, as you stated above. If someone does exceed the rated towing weights, is there anyone out there looking to fine them? Police?