An Off-Roader That Turns into a Boat
Forget magnetic levitation or advanced air suspension; the term "floating" in this context is completely literal. In early September 2026, Mercedes-Benz filed a patent for a sophisticated control system designed to allow a vehicle to enter a body of water,
remain afloat, navigate, and climb back onto dry land. The system, credited to inventor Joerg Kneip, outlines a remarkable amphibious capability that goes far beyond the typical water-fording depths of even the most rugged SUVs. This isn't just about surviving a deep puddle; it's about performing what the patent filing calls a "swimming operation."
How an SUV Learns to Swim
The core of the invention lies in a clever buoyancy system. The patent describes using detachable modules, made of either lightweight foam or inflatable materials, that are installed within the vehicle's four wheel arches. These modules provide the lift needed to keep the heavy SUV on the water's surface. When not in use, the inflatable versions could be deflated and conveniently stowed in the spare tire compartment, ready to be filled by the onboard air compressor when a water crossing is imminent. A central control unit manages the entire process, and can even adjust the buoyancy at each corner independently to keep the vehicle level and stable against currents or an unbalanced load.
Propulsion Without a Propeller
Perhaps the most ingenious part of the patent is how the vehicle would move and steer in the water without a traditional rudder or propeller. The system is designed to use the vehicle's existing hardware. Once afloat, the wheels would continue to rotate, acting as paddles to generate thrust. The vehicle’s adaptive suspension could also adjust the height of individual wheels, allowing the front steering wheels to be lowered deeper into the water to act like rudders for better directional control. This method turns the car's own running gear into a makeshift marine propulsion system.
The Electric Advantage
The concept becomes even more compelling when applied to an electric vehicle with multiple motors. The patent details how a system with four individually controlled motors—one for each wheel—could precisely manage aquatic movement. By varying the torque and rotational speed at each corner, the control unit could steer with incredible accuracy, counter the push of a current, and even rotate wheels in opposite directions to execute tight turns on the water. This level of control would also be critical for the challenging transition from floating back to driving, as the system could carefully apply power to the first wheels that touch the shore to ensure a smooth and successful exit from the water.
A Glimpse of the G-Wagen's Future?
While the patent documents do not name a specific model, industry observers have quickly pointed to the all-electric Mercedes-Benz G 580 with EQ Technology as the most logical candidate. That vehicle already features the four-motor architecture and sophisticated software that would be essential for this amphibious system to work. The electric G-Class is already known for impressive water fording capabilities and unique off-road functions like the "G-TURN," making it a natural platform for such a futuristic evolution. While this remains speculation, the technological synergy is hard to ignore.
From Patent to Production Line
It is crucial to remember that a patent filing is not a promise of a future product. Automakers regularly patent innovative ideas to protect their intellectual property, and many never reach the showroom. However, this filing does not appear to be a complete one-off. Reports indicate Mercedes-Benz was granted a related German patent in late 2025 for a floating vehicle concept, suggesting this is an area of ongoing research for the company. Together, these filings paint a picture of a dedicated engineering effort to redefine the boundaries of off-road exploration.
