Mercedes could adopt a conservative Power Unit map at the Australian Grand Prix following reliability issues during pre-season testing in Bahrain.
The Brackley-based team enters the 2026 season opener as favourites after a winter full of positive reports. However, the scenario on race day may not be entirely ideal. The Mercedes Power Unit showed some signs of strain during the Bahrain tests, and in Melbourne the team could opt for a more conservative engine mapping to safeguard reliability.
The cars driven by George Russell and Andrea Kimi Antonelli faced several technical issues over the six days in Sakhir. Customer teams, including McLaren, Williams, and Alpine, were allowed to run a less aggressive engine specification, which so far did not produce any major concerns.
Mercedes and the reliability concerns
According to Roberto Chinchero on the AutoRacer channel, Mercedes may run a restricted Power Unit mapping in Melbourne — essentially the same configuration used by the customer teams during pre-season testing.
“I’ve been told that Mercedes could run the same mapping the customer teams used,” the Italian journalist explained. “They lost two engines with two separate failures,” he added, referencing the incidents in Bahrain. Because of this, Antonelli lost significant track time preparing for the start of the season. When his Mercedes stopped on track due to a combustion engine failure, the Italian effectively lost an entire session.
In recent days, there had been speculation that customer teams might use a full-spec engine in Melbourne. Now, the scenario appears to be shifting in the opposite direction, with Mercedes likely prioritising race reliability over maximum performance.
Chinchero also highlighted the role of fuel in the 2026 season. “There are many aspects to consider. For example, which fuel Petronas will homologate at the last moment and whether any components had to be omitted,” he said, underlining the complex technical landscape the teams will face in Australia.
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