Mercedes endured a difficult three days of F1 pre-season testing in Bahrain, raising questions over whether the W17 remains the clear favorite for 2026. Expectations had been high for the Brackley team, especially after a dominant but largely unseen shakedown in Barcelona. However, the Bahrain tests highlighted several technical issues that affected the car’s overall performance and reliability.
The driver most impacted by these problems was Kimi Antonelli. The Italian had to miss the entire morning session of the second day due to an issue with the W17, which required an engine change. Even on Monday, Antonelli faced further delays in the afternoon session caused by suspension issues, limiting the team’s running time.
Mercedes no longer appears to be the outright favorite. The team continued to struggle with technical setbacks, again affecting Kimi Antonelli. He had to start his afternoon session later than the other drivers. Despite these challenges, Mercedes managed to set the fastest time of the day and of the entire Bahrain testing period, clocking a 1:33.900 — just 18 thousandths faster than George Russell’s morning time.
The W17 was the only car to break the 1:34 barrier, but as is well known at this stage of pre-season testing, lap times are not necessarily representative. Teams are primarily focused on reliability and total mileage — both areas where Mercedes fell short during these three days in Bahrain. Industry insiders suggest that while the Anglo-German team remains a favorite for 2026, its dominance is no longer as clear-cut as anticipated just two weeks ago.
Of course, statements from Toto Wolff and George Russell have shifted attention toward other teams, but they do little to mask the pressure building within the Silver Arrows camp. Next week, the F1 Commission will convene to discuss the ongoing engine case, which could have significant implications for Mercedes. It also remains possible that some of these technical issues are part of deliberate testing to stay within legal limits and avoid severe FIA sanctions.
The contrast between Mercedes’ raw one-lap pace and their fragile reliability has created one of the biggest talking points of the 2026 pre-season. While the W17 is clearly a fast racing car, the frequent trips to the garage suggest that the “Silver Bullet” might have some fundamental integration issues to solve before the lights go out in Melbourne.
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