During the Canadian Grand Prix, Mercedes unveiled a comprehensive technical upgrade package. While much of the development focused on the front and central sections of the chassis, the team also introduced unprecedented aerodynamic solutions at the rear of the car.
Mercedes arrived in Canada with its first major development cycle of the season, implementing changes across multiple aerodynamic zones. While maintaining much of its core design philosophy, the team almost entirely redesigned the front wing and applied significant modifications to the bargeboards and the floor.
The aerodynamic architecture ahead of the rear tires has become considerably more complex. This is a critical area for engineers, as they must constantly work to mitigate the turbulent wake generated by tire rotation. Further back, a distinctive new feature on the W17 has emerged within the diffuser region, representing an engineering direction that diverges from the rest of the F1 grid.
Since pre-season testing, most teams have attempted to maximize diffuser efficiency by extending its reach, often attaching extensions directly to the rear crash structure. Some designs have even integrated the horizontal supports for the rear wing into these extensions to push the limits of the regulations.
Mercedes diffuser
Photo by: Alessio Morgese / NurPhoto via Getty Images
Beyond the vertical elements mounted to the rear crash structure, a detailed inspection of the Montreal-spec W17 reveals new serrated profiles along the upper section of the diffuser. This design choice is reminiscent of the serrated elements utilized by several teams on the driver’s cockpit screen.
By employing this method, Mercedes has successfully extended the diffuser’s influence across more than half of its width—a unique approach that has not been replicated by any other competitor so far.
Further refinements are visible near the waterfall profiles adjacent to the diffuser. A small, outward-facing flow deflector has been introduced to fine-tune the management of airflow exiting the floor.
While many teams have focused on modifying the outermost edges of the diffuser where it meets the lateral waterfall sections—with Ferrari experimenting with lower-area solutions—Mercedes has opted for a different path. By adding this small deflector to the highest element of the waterfall structure, the team aims to clean up the exiting wake. This specific implementation marks another departure from the technical directions seen elsewhere on the grid.