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Mercedes may be leading the championship in 2026, but reliability problems have plagued them all season, and it could get worse in Austria.
In theory, the Red Bull Ring should suit the Silver Arrows, with its high-speed nature giving them an advantage on the straights. Furthermore, Ferrari’s small turbo could struggle with the track’s altitude and limit their surge towards the front.
But the Austrian Grand Prix might not be plain sailing for Mercedes either. They have problems of their own with the car, and they could be seriously exposed in Spielberg.
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FIA’s heat-hazard for the Austrian Grand Prix presents major reliability concern for Mercedes
Mercedes’ reliability problems with the power unit have been well-documented. The most concerning issue has been with the battery.
Jolyon Palmer says Mercedes have a ‘fundamental’ electrical issue, and both drivers have been suffering with it. George Russell’s battery failed in Canada while battling Kimi Antonelli for the lead, and the Italian had the same problem in Barcelona, forcing him to retire with laps to go.
It has not just been Mercedes suffering from unreliability, as the issues are being felt across their customer teams. McLaren have had multiple mechanical issues with the Mercedes power unit, with Lando Norris retiring in Canada and Monaco.
Mercedes’ customer teams are ‘concerned’ ahead of the Austrian GP, and they have every reason to be. The FIA have officially declared a heat hazard for the weekend, with track temperatures set to hit above 31 degrees at some point during the race.
This should set off alarm bells at Brixworth, as the increased heat and track temperature at the circuit will put Mercedes and their customer teams at serious risk of further mechanical failures.
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Mercedes cannot afford to have another mishap with the engine, especially when Ferrari are bringing an engine upgrade for the Austrian GP. The last thing they need is to let their rivals close the gap even further.
But the alarming thing is that the team do not seem to have a solution that does not limit them in another area. Mercedes may have to turn down their engine to solve the battery’s reliability issues – it may work, but it will decrease outright pace.
The weather conditions in Spielberg will put the Mercedes engines in danger of more failures and retirements. If they cannot find a way to cool the engine and manage the battery, their dominant advantage could soon dwindle.
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