Article To news overview © Mercedes Valtteri Bottas has reportedly lost the fourth engine from his pool for this season, after Mercedes uncovered problems with the unit back at their engine headquarters in Brixworth. Bottas introduced a fourth power unit at last month's Italian Grand Prix, triggering an engine grid penalty as just three units are permitted for the season. Using that engine for the Monza race, it was removed early during the Russian Grand Prix weekend as Mercedes opted to fit another fresh unit to Bottas' car in Sochi. This triggered yet another grid penalty. There were whispers that this was a tactical move to put Bottas further back and try to hamper Max Verstappen's...
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