2026 Grand Design Momentum M-Class 399M
Specifications
- Sleeps
- 6
- Length
- 44′ 10″
- Dry Weight
- 18,000 lbs
- GVWR
- 22,500 lbs
- Slideouts
- 4
- Fresh Water
- 140 gal
- Grey Water
- 104 gal
- Black Water
- 52 gal
- VIN
- 573FM473XTBB04795
Description
The 2026 Grand Design Momentum M-Class 399M redefines the essence of travel for those who seek both grandeur and the thrill of exploration. This FIFTH WHEEL HAULER is the perfect blend of home comfort and wanderlust, designed to take you places in style and luxury.
A Symphony of Style and Substance:
Experience a seamless fusion of elegant design and practicality with the 2026 Grand Design Momentum M-Class 399M. Its sleek, aerodynamic profile ensures a smooth journey, while its robust build, using premium materials, exemplifies durability and class.
A Sanctuary on Wheels:
The interior of the Grand Design Momentum is a realm of luxury. Spacious, intelligently designed, and lavishly appointed, it offers a tranquil retreat from the outside world, making every moment on the road a pleasure.
Comfort in Every Corner:
The Grand Design Momentum is synonymous with unparalleled comfort. From the plush seats to the tranquil bedrooms, each area is crafted to provide a relaxing and luxurious travel experience.
Safety: A Core Priority:
With the Grand Design Momentum, your safety is paramount. It incorporates the latest in safety technology, ensuring that every journey is not only enjoyable but also secure.
Eco-Friendly Exploration:
The 2026 Grand Design Momentum M-Class 399M is designed with the environment in mind. Featuring sustainable technology, it allows you to travel responsibly, knowing you're making a positive impact on the planet.
The Essence of the Grand Design Momentum:
Choosing the Grand Design Momentum is about valuing unforgettable journeys and impeccable style. It's the ideal companion for both short jaunts and long sojourns, transforming every trip into an experience filled with luxury and excitement.
Embrace the extraordinary with the 2026 Grand Design Momentum M-Class 399M. Set out on your adventures in this magnificent RV and make every mile a memory to cherish!
Features
Interior
Beds
Floorplan
Exterior And Appearance
Slideouts
Similar Units
RV Country is not responsible for any misprints, typographical errors, or other errors found on our website. Price excludes government fees and taxes and any finance charge. Manufacturer and/or stock photographs may be used in place of photographs of the actual unit on our lot, provided the photographs accurately reflect the model and configuration being advertised. Actual features, colors, finishes, and equipment may vary. Where an image is identified as a stock image, please confirm the specific unit details with your RV Country representative. 360° virtual tours are provided for reference to the corresponding floorplan. Actual features, colors, finishes, and equipment may vary from the specific unit in stock. All calculated payments are estimates only and do not constitute a commitment or representation that financing, a specific interest rate, payment, or term is available. Financing is subject to lender approval and applicable terms and conditions. Total advertised price includes all dealer fees and charges, including applicable document and preparation fees, but excludes government required taxes, title, registration, licensing, and other government imposed charges. Current posted web pricing is valid through the end of the current month: October 31, 2026. Please contact us at 559-486-1000 for current availability, as inventory changes rapidly.
WARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
