Toto Wolff says it is not worth Mercedes fighting the other manufacturers over a proposed change to the way compression ratios are tested in Formula 1, but the Mercedes team principal then reacted angrily to further questions relating to its fuel homologation.

The FIA has proposed a new approach to the way it tests for compression ratio limits, with Formula 1's power unit manufacturers to vote on whether to approve a mid-season change that could hamper Mercedes.

FIA single seater director Nikolas Tombazis says Formula 1’s governing body is trying to resolve the topic of compression ratio limits before the season-opening Australian Grand Prix.This year’s new power unit regulations restrict the compression ratio of the fuel/air mixture in the cylinder to 16:1, a reduction from 18:1 in...

Mercedes team principal Toto Wolff has told rival power unit manufacturers to “get your s**t together” and focus on their own performance rather than questioning the legality of the Mercedes design.