Kimi Antonelli’s late retirement in Barcelona turned what looked like another strong Mercedes result into a warning about the team’s reliability and its title fight. Antonelli was running second and had just passed teammate George Russell when his car failed at Turn 5 with three laps left, costing him 18 points and cutting his championship lead over Lewis Hamilton from 59 points to 41. Mercedes boss Toto Wolff said the team cannot keep losing finishes and points through mechanical failures if it wants to stay ahead in the standings, and said reliability must become the top priority.
Mercedes believes the latest failure may have been battery-related, and Wolff said the Barcelona problem was likely a small battery deployment issue, possibly caused by Antonelli pressing the button too late. He said that error was not the main reason for the result. The team has now had two engine failures in the last three races, after Russell’s earlier failure in Montreal, and Antonelli’s exit ended Mercedes’ winning streak after a run that had helped define its season.
Antonelli said he had not felt comfortable in the car all weekend and admitted he had been overdriving in search of more pace. He qualified third behind Russell, who took pole, and Ferrari’s Lewis Hamilton, and said hot, tire-sensitive conditions made the Mercedes hard to manage over one lap. Antonelli had also struggled with balance and grip, missed FP1, and said the car looked more competitive over a race stint than in qualifying. Even so, Barcelona brought his first significant setback of the 2026 season after five straight wins in China, Japan, Miami, Canada and Monaco.
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