New 2020 Mountain Aire 4579 Motor Home Class A - Diesel

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Mountain Aire 4579 Description

Newmar Mountain Aire Class A motorhome 4579 highlights:

  • Bath and a Half
  • King Bed
  • Exterior Storage
  • Passenger Work Station


Travel like royalty in this Mountain Aire diesel motorhome! The private bedroom is equipped with a king-size bed, a dresser, overhead cabinets, and a Samsung LED TV, and if that's not enough for you then check out the rear master bath. It features a 50" x 34" shower with a seat for you to get squeaky clean, a walk-in closet for you to choose your favorite outfit from, and a Splendid stackable washer/dryer so you can extend your trip even longer. After you've gotten all cleaned up, head into the kitchen/living area where you can grab your favorite snack from the large pantry, your favorite beverage from the Whirlpool 19.7 cu. ft. refrigerator and either head to the hide-a-leaf dinette to play some games or relax on the 87" Chaise sofa or the 68" Dormi sofa!


You will be creating your own classic beauty when you select Newmar's Mountain Aire Class A diesel motorhome for your traveling home. This luxury coach tells the world that you have arrived, and you have impeccable taste! Powered by a 500 Hp Cummins® engine atop a Freightliner or Spartan chassis you can go just about anywhere.  They are also built on an ultra-durable STAR foundation for a quieter ride and come standard with the Comfort Drive adaptive steering with Passive Steer technology. Inside each model you will find an impressive living space including fantastic entertainment features like a retractable Samsung 50" 4K LED TV, a Bose 300 SoundTouch soundbar, and a Sony Blue-ray player. You will also love the appealing refreshed tile floor with radiant electric heat, and the elegant decorative touch of the designer feature ceiling. It's time you do traveling the right way with one of these Mountain Aire Class A diesel motorhomes!

Mountain Aire 4579 Specifications

Sleeps 6
Slides 3
Length 44 ft 10 in
Ext Width 8 ft 6 in
Ext Height 13 ft 2 in
Int Height 6 ft 11 in
Interior Color Artisan, Barnsley, Palisade, Windsor
Exterior Color Artisan, Barnsley, Palisade, Windsor
Hitch Weight 15000 lbs
Gross Weight 54000 lbs
Dry Weight 46000 lbs
Cargo Weight 8000 lbs
Fresh Water Capacity 105 gals
Grey Water Capacity 65 gals
Black Water Capacity 45 gals
Furnace BTU 50000 btu
Generator 12.5 KW Cummins Onan
Fuel Type Diesel
Engine Cummins ISX
Chassis Freightliner SL
Horsepower 500 hp
Fuel Capacity 150 gals
Wheelbase 294 in
Number Of Bunks 1
Available Beds King
Torque 1645 ft-lb
Refrigerator Type Whirlpool
Refrigerator Size 19.7 cu ft
Convection Cooking Yes
Cooktop Burners 2
Shower Size 50" x 34"
Number of Awnings 2
Axle Weight Front 20000 lbs
Axle Weight Rear 20000 lbs
Axle Weight Tag 14000 lbs
LP Tank Capacity 22 gals
AC BTU 45000 btu
TV Info Cab 43" Samsung LED, LR 50" Samsung LED, BR Samsung LED
Awning Info Nova Side
Washer/Dryer Available Yes
Gross Combined Weight 69000 lbs
Shower Type Shower w/Seat
Electrical Service 50 amp

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Newmar is a company built around the Christian faith, specifically the beginning of the Mennonite faith in 1525 under the guidance of Ulrich Zwingli, and the founding of the Amish fellowship under Jacob Amman in 1693.


At Newmar, we believe that a motor coach is more than just a vehicle, it’s a passport to countless hours of fun and a lifelong memories taken from quality time spent with family and friends.


For over 50 years, we’ve applied our principles to the creation of motor coaches that have allowed people all over the world to live the RV lifestyle. And we’ll continue to so for countless generations to come. It’s why we take pride in every rivet, weld, and mechanical function.