An Off-Roader That Swims
In early September 2026, the automotive world began buzzing about a patent filed by Mercedes-Benz Group AG for what is essentially an amphibious control system for an SUV. The patent, credited to inventor Joerg Kneip, describes a system that allows a two-axle
vehicle to enter a body of water, stay afloat, navigate its surface, and climb back onto dry land. This isn't just about fording a deep puddle; the language in the filing explicitly refers to a "swimming operation," suggesting a vehicle that is as comfortable on a lake as it is on a rocky trail. This represents a significant leap beyond the already impressive water-fording capabilities of models like the electric G-Class, which can handle depths of up to 850mm. The new patent envisions a vehicle that doesn't just wade through water but travels across its surface.
The Technology Behind the Float
So, how does a multi-tonne SUV defy gravity and physics? The core of the invention lies in a sophisticated, software-managed system. It starts with removable buoyancy devices, either inflatable bladders or lightweight foam inserts, designed to be fitted into the vehicle's wheel arches. These aren't just passive floaties; a central computer can inflate, deflate, or adjust them independently at each corner to maintain stability against currents or an unbalanced load. For propulsion, the vehicle cleverly uses what it already has: its wheels. The patent details how the wheels and tires would act as paddles. An advanced control unit would manage the power sent to each wheel individually. This is particularly well-suited for an electric vehicle with four independent motors, like the new G 580 with EQ Technology. The system could even reverse the rotation of wheels on one side to help steer or execute tight turns on the water, while the adaptive suspension could lower the front wheels deeper to act like rudders.
More Than Just a Party Trick
While the idea of a swimming G-Wagen is certainly a novelty, the patent describes a highly practical system for entering and exiting the water. The controller would meticulously manage traction as the vehicle transitions from water to land, applying precise power to the first wheel that makes contact to prevent slipping or digging into a muddy bank. The buoyancy aids are designed to be practical, too. The patent suggests they could be stored in the space typically reserved for a spare tire and inflated using the onboard tire compressor. This means the vehicle wouldn't be permanently amphibious, but could be converted for water crossings when needed. This hints at applications beyond recreational use, including for emergency services in flood-prone areas or for explorers needing to cross remote, unbridged rivers. The technology aims to reassure adventure enthusiasts that the move to electric power won't diminish the vehicle's legendary go-anywhere character.
From Patent to Production?
It's crucial to remember that a patent filing is not a promise of a production model. Automakers file patents constantly to protect innovative ideas and research directions. There is currently no official confirmation that Mercedes-Benz is planning to mass-produce a floating SUV. However, this isn't the first time Mercedes has explored this territory. Another related patent was granted in Germany in December 2025 that described a floating vehicle with dedicated marine lighting. When viewed together, these filings suggest a consistent and serious engineering direction within the company. While the patent doesn't specifically name the G-Class, its advanced four-motor electric powertrain and sophisticated torque vectoring make it the most logical candidate for such a system. The features enabling the G-Wagen's famous "G-TURN" are the very same that would allow for precise control on water.
