Dynamax DynaQuest XL RVs For Sale

Dynamax Dynaquest XL Super C diesel motorhomes for sale at Motor Home Specialist, the #1 Volume Selling Motor Home Dealer in the World, and a full-line Dynamax RV Dealer. The Dynamax® Dynaquest® XL is a Super C diesel motorhome built on the commercial-grade Freightliner® M2 112 PLUS chassis with the Cummins® L9 turbo diesel engine producing 450 horsepower and 1,250 lb-ft of torque. Shopping for a new Dynaquest XL or a used Dynaquest XL? MHSRV stocks one of the largest selections of Dynamax Dynaquest XL motorhomes for sale anywhere in the country, all backed by industry-leading discount pricing.

The Dynaquest XL sits in a specific position in the motorhome market that doesn't get filled often: a Super C with genuinely commercial chassis credentials, Class A diesel pusher-level interior amenities, and a truck-cab driving experience that buyers downsizing from a 40-foot diesel pusher actually appreciate. Many Dynaquest XL buyers are stepping down from a Class A diesel pusher because they want easier service-network access, a smaller footprint for state park and national park access, and a more familiar cockpit ergonomic — without giving up the Cummins L9 powertrain, the Aqua-Hot hydronic system, the residential refrigerator, or the king bed. The Freightliner M2 112 PLUS chassis is what makes that possible. It's the same family of medium-duty truck chassis used in commercial delivery, bucket trucks, and emergency vehicles — built to commercial driver comfort and safety expectations, not RV-industry minimum specs.

Under the hood, every Dynaquest XL is powered by the Cummins L9 turbo diesel engine producing 450HP and 1,250 lb-ft of torque, paired with the Allison® 3200 TRV six-speed automatic transmission. Standard chassis features include the Freightliner M2 112 PLUS platform (33,000-pound GVWR, 54,000-pound GCWR), the Airliner 21,000-pound rear air suspension with a manual dump valve switch on the dash, full air brakes with 4-wheel ABS, the C-Brake by Jacobs engine brake with high/low settings, a rear locking differential, a 275-amp alternator, twin 50-gallon aluminum fuel tanks (100 gallons total) with the Equiflo inboard fuel system, a 6-gallon DEF tank, a 4.78 rear axle ratio, and Alcoa polished aluminum wheels (single front, dual rear) with 275/80R22.5 14-ply radial tires.

What's worth pausing on here is the chassis pedigree relative to typical Class C and even most Super C products. The Freightliner M2 112 PLUS uses a steel-reinforced aluminum cab that's engineered for professional driver fatigue management, not RV cost-cutting. The Airliner 21,000-pound rear air suspension delivers a level of ride refinement that gas Class C platforms simply can't match. The Cummins L9 at 450HP is the same powertrain used in the Tiffin Phaeton flagship Class A diesel pusher. And the Allison 3200 TRV transmission is a commercial-grade six-speed designed for sustained heavy hauling. This is genuinely commercial-tier chassis equipment dressed up as a Super C motorhome.

Standard cockpit safety features include Active Brake Assist, Front Collision Warning, Lane Departure Warning, cruise control, dual chrome roof-mounted air horns, and tire pressure monitoring. The Sony 10.1-inch HD touchscreen infotainment system supports AM/FM, Bluetooth, SiriusXM (with tuner and antenna), wired and wireless Apple CarPlay and Android Auto, USB-C, and high-resolution audio, paired with the JBL premium cab sound system tuned specifically for the Freightliner M2 (full-range/tweeter coaxial speakers, dual voice coil subwoofer, and a 4-channel DSP amplifier). Visibility comes from the Quad-View camera system (right side, left side, hitch, and rear horizon views), power-heated exterior mirrors, and an adjustable steering column with an 18-inch leather-wrapped steering wheel. Seating is leatherette air-ride driver and passenger chairs with air lumbar controls.

The 10,000-pound trailer hitch you'd expect on a Class C steps up substantially here: every Dynaquest XL has a 20,000-pound trailer hitch with 2,000-pound tongue capacity and a 7-way round connection. This puts the Dynaquest XL in legitimate heavy-trailer territory — enough capacity to pull a fully-loaded enclosed car hauler with a substantial vehicle inside, a tandem-axle equipment trailer, a large boat, or a multi-vehicle setup behind the coach. The 54,000-pound GCWR provides operational headroom at or near maximum tow ratings.

The Dynaquest XL is offered in five floor plans, each with a distinct character. The 3200KD (34'4" overall length) is the most compact and maneuverable, with the 16-cubic-foot residential refrigerator paired with a side pantry, dual power reclining theater seats standard in lieu of a sofa, the single roof-mounted awning, and the smaller 1.55-cubic-foot Truma portable cooler in the exterior storage bay. The 3400KD (37'2") steps up to dual awnings, the 24-cubic-foot residential refrigerator, the standard tri-fold sofa with optional theater seating, and the larger 2.43-cubic-foot Truma portable cooler. The 3700BD (39'8") is the family-flagship Super C floor plan with the bunk-bed layout — twin bunk mattresses (28"x76"), privacy partition between the bunks and the master bedroom, and two bunk CD/DVD players with monitors — a configuration that's genuinely rare in the Super C segment. The 3700RB (41'3") is the rear-bath flagship with a full rear bath featuring dual under-mount sinks and the most generous master bath layout in the lineup. The 3801TS (39'8") replaces the typical living-area TV with a pop-up 50-inch LED Smart TV and electric fireplace entertainment center combination — distinct from the other floor plans for buyers who prioritize a focal-point living room feature.

Inside the Dynaquest XL, every floor plan features luxury vinyl tile flooring throughout (with a coordinated entry surround), a soft-touch padded vinyl ceiling, dimmable LED recessed ceiling lights, hardwood raised-panel cabinetry with five-piece drawer fronts and dovetail joints, hardwood Shaker-style passage doors with hidden hinges and full-extension soft-closing drawer guides, magnetic thermal reflective front privacy shades, and USB and USB-C charging ports throughout. The Bose sound system is standard, paired with floor-plan-specific TV configurations: a 42-inch LED Smart TV in the living area on most floor plans, stepping down to 39-inch on the 3700BD, or up to the pop-up 50-inch with fireplace on the 3801TS.

The Dynaquest XL kitchen is built around residential-grade appliances: a 24-cubic-foot residential refrigerator with ice maker (on the 3400KD, 3700BD, 3700RB, and 3801TS) or a 16-cubic-foot residential refrigerator with a side pantry (on the 3200KD), an induction range, a convection microwave with air fryer functionality, solid surface countertops with LED edge lighting and solid surface backsplash, a stainless steel sink with solid surface covers, a residential stainless steel gooseneck faucet, a pantry, overhead cabinet accent lighting, under-cabinet lighting, and a MaxxAir power vent with built-in rain cover.

The master bedroom features a King-size 71"x78" bed with a gel-infused memory foam mattress, a deluxe padded headboard, a designer bedding package, a 32-inch LED Smart TV with a Bose sound bar (on every floor plan except the 3200KD), a cedar-lined wardrobe with a digital safe, nightstands with solid surface countertops, LED reading lights, and USB/USB-C charging. The 3700BD adds the bunk bed area with twin mattresses, privacy partition, and dual bunk CD/DVD players with monitors.

The master bathroom features a 36"x30" solid surface shower with a teak fold-down seat, glass shower door, shower skylight, and Oxygenics Body Spa shower head, paired with a solid surface countertop with LED edge lighting and an under-mount sink with a residential brushed nickel faucet. The 3700RB steps up to a full rear bath with two sinks, while the 3700BD and 3801TS use a porcelain foot-flush toilet (other floor plans use the porcelain electronic-flush macerator toilet).

For electrical and off-grid capability, every Dynaquest XL ships standard with two 12V Group 8D AGM deep-cycle maintenance-free batteries (490aH total), a 3,000-watt hybrid pure sine wave inverter/charger, an 8kW Onan diesel generator mounted on isolator pads with auto transfer switch and automatic generator start, a 200-watt glass solar panel with 30-amp controller, 50-amp service with a 36-foot power cord reel, an Energy Management System, and Firefly multiplex wiring with a touchscreen command center, switch panels, and Bluetooth smartphone app control. Climate is handled by dual ducted low-profile 15,000-BTU air conditioners with heat pumps and the Aqua-Hot 450D diesel system with engine pre-heat — a luxury-tier hydronic heating system that provides both heated air and water from a single integrated unit, fed by the same diesel fuel as the engine and the generator.

For buyers planning extended boondocking, the optional Xplorer Package adds an insulated cab curtain, two lithium house batteries (540aH total) plus a 1,000-watt solar package (vs. the standard 200W with AGM batteries), an insulated utility bay, and access to the exclusive Xplorer paint scheme options (Dark, Light, or Midnight). Units built starting at DLC007264 ship with three lithium house batteries (720aH total) in the Xplorer Package — a meaningful capacity bump for cold-weather and shoulder-season off-grid use.

Connectivity has evolved with running changes. Units built starting at DLC007192 ship with a roof-mounted Starlink satellite internet system as standard equipment (no aftermarket modification required). Units built before DLC007250 ship with a KING DISH Tailgater Pro premium HD satellite with DISH Network receiver; units starting at DLC007250 ship with a Winegard in-motion satellite. A Winegard over-the-air HDTV antenna is also standard, paired with cable TV/satellite hookup in the service bay and a 4x4 HDMI matrix for routing video sources to multiple TVs.

The Dynaquest XL ships standard with custom full-body paint with scheme-matching cab door jambs and slideout sides, a premium cut-and-buffed paint finish, front-end Diamond Shield paint protection, dual roof-mounted integrated armless patio awnings with LED lighting and wind sensors (single awning on the 3200KD), aluminum-wrapped slideout toppers, an LED patio light, an entry door with rotary latch and dark-tinted frameless window with integrated shade, a keyless entry touch pad at the entry door, remote locking for exterior storage doors and entry door, a lighted acrylic entry grab handle, power entry steps with upgraded SeaDek step treads, polished stainless steel step accents, dual chrome roof-mounted air horns, and a chrome exhaust tip. The exterior wall-mounted entertainment center features a 40-inch LED Smart TV with an integrated JBL sound bar on a swivel extension mount. The optional Black Out Package replaces the chrome and stainless accents with blacked-out finishes (cab entry steps, side mirrors, rock guard, wheels, headlight bezels, exterior grab handle trim, storage door handles, custom grill and vent, and black stainless lower skirt accents and rear tail light accents) for buyers who prefer a more aggressive aesthetic.

For coach construction, the Dynaquest XL uses 2-inch aluminum-framed laminated sidewalls with high-density block foam insulation, composite exterior fiberglass with no exterior wood, an aluminum-framed floor and aluminum-framed roof trusses, a crowned one-piece fiberglass roof, foil-lined ductwork throughout, fiberglass rear cap and front wing panels, dual-pane dark-tinted frameless square windows with built-in night shades and screens (standard on every Dynaquest XL, unlike many Class C and even Super C competitors that charge separately for dual-pane), and automatic four-point hydraulic leveling jacks.

The Dynaquest XL also offers two distinct front cap configurations as options: an aerodynamic fiberglass front cap with cab-over cabinets (for buyers who don't need a cab-over sleeping area and prefer the cleaner aerodynamic profile), or an extended fiberglass front cap with a cab-over bunk mattress (50"x79") and privacy curtain (for buyers who want the additional sleeping area). These choices meaningfully change the visual profile of the coach.

MSRP on the 2026 Dynaquest XL starts at $450,584 for the 3200KD, $466,161 for the 3400KD, $476,595 for the 3700BD, $488,984 for the 3801TS, and $492,760 for the 3700RB, exclusive of tax, license, registration, freight, additional options, and dealer prep and fees. Motor Home Specialist offers industry-leading discount pricing on every new Dynaquest XL for sale, well below MSRP.

Dynamax Dynaquest XL floor plans available at MHSRV include the Dynaquest XL 3200KD (34'4" overall length, the most compact and maneuverable floor plan with theater seating standard, single awning, and 16-cubic-foot refrigerator with side pantry), 3400KD (37'2", dual-awning mid-size floor plan with the 24-cubic-foot residential refrigerator and tri-fold sofa standard), 3700BD (39'8", the bunk-equipped family-flagship floor plan with twin bunk mattresses, privacy partition, and dual bunk CD/DVD players), 3700RB (41'3", the rear-bath flagship with dual sinks in the full rear bath and the most spacious master bedroom layout), and 3801TS (39'8", the entertainment-flagship floor plan with the pop-up 50-inch LED Smart TV and electric fireplace combination entertainment center).

Cross-shopping the Dynaquest XL? Within Dynamax's own lineup at MHSRV, consider the Dynamax Isata 6 (the slightly smaller Super C in the lineup), and step down to the Isata 4 or the Ram-5500-based Isata 3. Buyers cross-shopping the broader Super C diesel segment typically also evaluate the Thor Magnitude Grand, Thor Inception, Newmar Super Star, Renegade Verona, and Tiffin Allegro Bay — all available at Motor Home Specialist alongside the Dynamax lineup. For buyers cross-shopping the question of Super C vs. Class A diesel pusher (a common Dynaquest XL decision point), MHSRV stocks a comprehensive selection of mid-tier Class A diesel pushers including the Tiffin Phaeton, Allegro Red, and the broader Class A diesel pusher market.

Manufacturer options, features, colors, etc. can all change without notice and MHSRV assumes no responsibility for the changes or possible errors in information provided by the manufacturer. All weights and measurements are approximate and not guaranteed to be 100% accurate. For the latest information be sure to check with your salesperson and/or the coach manufacturer and verify before purchase.