Mercedes has been instructed to remove the teardrop-shaped blisters atop its diffuser, according to Motorsport Magazine. This decision comes just ahead of the Austrian Grand Prix and follows inquiries from Ferrari to the FIA regarding the legality of this design feature.
What happened
Mercedes faced a significant setback when the FIA ordered the removal of its innovative diffuser design. According to Motorsport Magazine, this decision was prompted by Ferrari’s questioning of the feature’s legality. The blisters, which were designed to enhance airflow and create vortices, were introduced during the Canadian Grand Prix weekend.[2]
Despite having submitted blueprints to the FIA prior to implementation, Mercedes must now make adjustments. The FIA has re-evaluated its stance after Ferrari raised concerns. “Following Ferrari’s questions, the FIA has rethought its interpretation and instructed Mercedes to make suitable changes,” the report mentioned.[3]
Why it matters
This ruling underscores the intense competition and scrutiny in Formula 1, where even minor design elements can impact performance significantly. The adjustments could translate to essential milliseconds on the track, demonstrating how crucial every design detail is in pursuit of victory.
Background
On May 27, 2026, during the Canadian Grand Prix, Mercedes first introduced the blisters on its diffuser. The design was intended to create vortices that would manipulate air pressure behind the diffuser, effectively enlarging its aerodynamic effect. However, this innovation drew the attention of competitors.[1]
Ferrari’s own design took advantage of a regulatory loophole, allowing its rear bodywork to extend beyond standard limits. This strategic implementation led to a rivalry that prompted further inspection by the FIA.
What’s next
Mercedes must complete modifications to its diffuser ahead of the Austrian Grand Prix scheduled for July 2, 2026. The team will likely focus on adjustments that comply with FIA regulations while maintaining optimal performance.
