I don't have a concise answer for you. But, from my research, since your 2011 was built in 2010, it may not require DEF, as Cummins started putting it in vehicles, I think starting the 2011 model year. G/L finding your answer.
2006 Damon Daybreak 3276 35'. 3 200 Amp Lithium batteries and 2000 watt Pure wave inverter/charger.
2013 Elantra on a Master Tow dolly.