2005 Newmar Mountain Aire 3778, 2005 Newmar Mountain Aire 3778. The 3778 is a great floor plan for a gas coach. It has the rare rear wardrobe with lots of storage. CorianWood FloorConvection/Microwave8 c.f. Dometic RefrigeratorSlide-out PantryFantastic Fan w/Rain Sensor, Glass ShowerWasher/Dryer, Leather Power SeatsAM/FM/CDPower VisorsCruise, Onan 7000 GeneratorLadderElectric StepDual Pane Windows, Queen BedUpdated 32" TVRear Cap Wardrobe, Surround SoundUpdated 32" TVDVD/VCRTwo Recliners, Chevy 8.1 Vortec