UNBOUND
What Sets the Unbound Apart
Built on a 144 Sprinter Cab Chassis - All Wheel Drive
Toy Hauler Rear Ramp Door — The signature feature. The rear door doubles as a suspended deck/patio, expanding your usable interior space when parked. Max ramp load: 2,500 lbs.
Cab Pass-Through — Move freely between the cab and living area without going outside.
Arctic Tern Overland RV Door — Purpose-built entry door designed for overland and off-grid use.
Dual-Pane Awning Windows with Shades by Tec Vanlife — Insulated, ventilated, and private.
Exterior Lockable Storage Compartments — Multiple compartments with magnetic holsters for secure, accessible gear storage.
Full Subframe Construction — Structural integrity built in from the start.
Fully Insulated Walls, Floor & Ceiling
Upgraded Suspension & Tires — Capable on any terrain right out of the gate.
Specifications
| Starting Price | $117,000 (depending on chassis year & options) |
|---|---|
| Length | 21’ 7” |
| Width (w/ Mirrors) | 7’ 11.5” |
| Height | 10’ |
| Interior Height | 6’ 8” |
| Interior Width | 6’ 10.5” |
| Ramp Door Max Load | 2,500 lbs |
| GVWR | 11,030 lbs |
| Dry Weight | 6,850 lbs |
| OCCC | 4,180 lbs |
Base Vehicle — Mercedes-Benz Sprinter 3500XD
| Chassis | Mercedes-Benz Sprinter 3500XD Dually |
|---|---|
| Wheelbase | 144” Cab Chassis |
| Drivetrain | AWD (All-Wheel Drive) |
| Engine | 4-Cylinder High-Output Turbo Diesel |
| Transmission | 9-Speed Automatic |
| Footprint | Under 22 feet — fits standard parking & 93% of National Parks |
Why start with modbox?
A Better Foundation Than an Empty Cargo Van
Lots of builders start with a bare Mercedes Sprinter cargo van and work up from there. We think you deserve better than that. The Unbound comes with a fully insulated box, professional insulation, upgraded suspension, a full subframe, and overland-specific features already done right. You start ahead.