F1 | Wolff admits Mercedes have ‘question marks’ over power unit performance in remaining 7 races

Mercedes head into the final seven races of 2021 leading both the drivers’ and constructors’ titles. But according to Team Principal Toto Wolff, the Silver Arrows are feeling far from comfortable, with power unit worries at the forefront of their minds going into the tail-end of the season.

Lewis Hamilton helped Mercedes maintain their unblemished Sochi record with his 100th Grand Prix victory in Russia. But having changed team mate Valtteri Bottas’ power unit at the Italian Grand Prix two weeks before, Mercedes made the surprising decision to give Bottas a fifth power unit in Russia, relegating him to a P16 start.

Asked after the Russian Grand Prix about the switch, and whether it was a means of ‘stockpiling’ power units for Bottas for the remainder of the year, Wolff replied: “I think we haven’t only made the cautionary engine change because we felt we wanted to stockpile, but also because we want to understand the engine’s performance – and that has given us some question marks.”  —read more—