Bahrain – Mercedes has unveiled a substantial upgrade package for its W17 Formula 1 car during the second and final pre-season test in Bahrain, signaling a clear intent to challenge for the upcoming 2026 season. The team, which topped the timesheets at the conclusion of the first Bahrain test week, is pushing development aggressively with drivers Kimi Antonelli and George Russell sharing testing duties.
The upgrades, revealed on the first day of testing this week, are extensive, touching nearly every aspect of the car’s design. A key focus appears to be aerodynamic efficiency, with modifications aimed at maximizing airflow and downforce. The most visually striking change is a more compact rear end, particularly around the sidepods, demonstrating a shift towards a tighter, more integrated design philosophy.
Beyond the overall shape, several specific components have been revised. A new vane has been added to the top of the sidepod, working in conjunction with redesigned cooling exits. These changes are intended to optimize airflow management and improve the car’s thermal performance. The team has also adjusted the wing mirror mount, moving towards a straighter design, likely to refine airflow around the cockpit.
Significant attention has also been paid to the underfloor of the W17. Modifications to the rear floor corner suggest an effort to enhance downforce generation and improve the car’s handling characteristics. The brake ducts at the front have been reduced in size, a move that aims to improve airflow to the front wing and, overall aerodynamic performance.
The front wing itself has received attention, with the addition of a horizontal vane on the endplate – a design element increasingly common across the grid, including McLaren. This vane is designed to split airflow, directing it downwards and around the tires, enhancing downforce and grip.
At the rear of the car, a slightly revised engine cover houses an updated exhaust system and cooling gills on the sidepods have been redesigned. These changes are focused on improving engine cooling and optimizing the car’s overall aerodynamic profile. The modifications to the cooling system are particularly noteworthy, indicating a focus on maximizing performance without compromising reliability.
The extent of these changes suggests Mercedes is no longer holding back concepts explored during the design phase, and is now fielding what appears to be the definitive configuration of the W17. This aggressive approach contrasts with a more cautious strategy adopted during the initial stages of development, prioritizing reliability in the first test.
Interestingly, Mercedes appears to have drawn inspiration from rivals, particularly Red Bull, in adopting more extreme packaging solutions. RacingNews365.com reports that Mercedes has embraced micro-aerodynamic solutions and a noticeably altered sidepod profile, mirroring elements seen on the Red Bull RB22. This suggests a willingness to learn from competitors and incorporate successful design elements into their own car.
The team has also seemingly adopted mirror mounts similar to those used by Ferrari, further demonstrating a willingness to explore and implement solutions from across the grid. Gary Anderson, writing for The Race, highlighted the addition of a horizontal vane to the front wing endplate, explaining its function in directing airflow downwards and around the tires.
These updates come as Red Bull also unveils an aggressive upgrade package for Max Verstappen during the Bahrain test, setting the stage for a potentially intense battle for supremacy at the start of the 2026 season. The competitive landscape is clearly heating up, with both teams demonstrating a commitment to pushing the boundaries of performance.
Mercedes’ strong performance in the first Bahrain test, finishing first and second on the timesheet, provided a solid foundation for these upgrades. The team is now looking to build on that momentum and establish itself as a frontrunner in the upcoming season. The shakedown of these new components in Bahrain will be crucial in validating their performance and preparing the W17 for the challenges of the Australian Grand Prix and beyond.
