Mercedes have refused to reveal where they've spent their tokens for the chassis development, but have listed a range of updates for their power unit. The seven-time World Champions revealed their 2021 F1 challenger, the W12, on Tuesday morning.  Keeping it secret  During the car reveals over the last few weeks, most teams have revealed where they've spent their tokens. McLaren's attention was focused on fitting their new Mercedes engine, while teams further down the grid focused on the front-wing.  "What's carried over will look different from team to team, because the rules didn't require you to carry over the same things," said James Allison. "The rules...
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