Mercedes will run two completely different aero packages in Singapore, with Kimi Antonelli keeping the updates from Malaysia while George Russell reverts to the previous spec. The move comes after the new parts failed to deliver expected lap time gains in Sepang, though the team suspects that was track-specific—extreme heat, rough tarmac, missing asphalt in places. Russell pushed for the split-spec test before his race even ended, and his late power unit failure sealed it with a grid penalty. "It was kind of a no-brainer," he said. Antonelli gets a new front wing this weekend to complete the upgrade package, which the team isn't ready to write off after one outlier event. Russell rolls back to the car he won Baku with. Singapore's cooler temps and better surface should give Mercedes the clean data they need to decide whether the updates unlock performance or head to the bin.
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