2017 newmar mountain aire 4553 2017 newmar mountain aire 4553 45' class a motorhome. cummins 500hp diesel engine 3 slide outs 2 awnings sleeps 4 triple a/c units leveling jacks. you will love that the mountain aire 4553 motor home by newmar has triple slides and one of the slides is a wall slide which really helps to open up the living space. you will also find a bath and a half king bed and plenty of storage space for all of your necessary items. as you enter this motor home you will love the openness and spaciousness of the kitchen/living area. both of the driver and passenger....