2026 Grand Design Momentum M-Class 399M
Specifications
- Sleeps
- 6
- Length
- 44′ 10″
- Dry Weight
- 18,000 lbs
- GVWR
- 22,500 lbs
- Slideouts
- 4
- Mileage
- 0
- Fuel Type
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
Options
Similar Units
Great American RV Road Show is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, licensing, and registration fees. Sale price does include DOC fee. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @ 213-782-7623 for availability, as our inventory changes rapidly. All calculated payments are estimates only and do not constitute a commitment that financing, a specific interest rate, or term is available. Please note that 360 virtual tours are for reference of the corresponding floorplan. Actual features, colors, and finishes may vary to the unit in stock. In WA, OR, NV, CA, and AZ, prices exclude sales tax, title, registration, and any applicable document fee. Dealer services such as Pre-Delivery Inspection (PDI) costs, battery setup charges, and detail services are also excluded from the sales price and are optional at the time of sale. Optional service charges and DOC fee will be itemized on the final buyer’s order and discussed during the sales process. Current posted web pricing is valid through the end of the current month: 2026-08-31. Manufacturer and/or stock photographs may be used and may not be representative of the unit being viewed. Where an image has a stock image indicator, please confirm specific unit details with your dealer representative.
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.
Prices do not include government fees and taxes, any finance charge, any electronic filing charge, or any emissions testing charge.
