New 2026 Grand Design Lineage Series M 25FW Motor Home Class C - Diesel

The Colton RV & Marine Advantage

No Hidden Fees RV and Boat Pricing:

The Colton RV & Marine Advantage (What Others Don’t Tell You).

Buying an RV or boat should feel exciting — not confusing. That’s why we created No Hidden Fees RV and Boat Pricing, part of the Colton Advantage.

Too often, shoppers fall in love with a unit online, only to be hit later with surprise fees like freight (getting the RV or boat to the dealership) or prep (the cost to clean, inspect, and ready the unit for you). These extra charges can add $1,000 to $10,000 to your total — and most dealers don’t mention them until it’s time to sign.

At Colton RV & Marine, we don’t believe in that. That’s why we created Colton Advantage Pricing — our commitment to transparent, all-inclusive pricing that respects your time and your budget.

Grand Design Lineage Series M 25FW Class C diesel motorhome highlights:

• Full-Wall Slide
• 16' Awning
• Full Bath
• Power Theater Seating
• Pantry

Head to your local state park or across the states in this spacious coach. Once you arrive at your destination, you can prepare a meal with the full kitchen amenities, including a cooktop, microwave oven, and a refrigerator. The power theater seating provides a place to relax, or you can choose the optional booth dinette if you need additional sleeping space. A full bath will let you clean up after a day outdoors, and the 70" x 80" king bed within the full-wall slide is sure to bring comfort. This model also includes a pantry beside the theater seats for snacks and a bedroom wardrobe to keep your clothes wrinkle-free!

Grand Design's first motorized coach, the Lineage Series M is coming to you with luxurious features at a great value. This Class C diesel motorhome sits on a Mercedes-Benz sprinter chassis for quality and performance you can trust. True to Grand Design's foundation, the Lineage includes interior comforts, durable construction, innovative features, and attention to detail. The Series M Package includes natural teak wood grain, a Lineage Suspension Package, and more. There is also a Blackout Package with black aluminum wheels, a Chromeout Package with chrome aluminum wheels, plus additional packages to enhance your travel experience!