Wolff cautions that ADUO must not 'alter the sequence.'

      Toto Wolff has cautioned the FIA against permitting new engine concessions to disrupt the current competitive landscape of Formula 1. With increasing speculation that Ferrari might benefit from the ADUO system, potentially narrowing the performance gap to Mercedes or even surpassing them, Wolff expressed he would be "surprised and disappointed" if that were to occur.

      "Every team has their performance assessments regarding the other engines, and from my perspective, it seems there's one engine manufacturer facing issues, and we need to assist them," he commented. "The others are mostly in a similar performance bracket, so I would find it quite surprising and disappointing if ADUO made choices that impacted the current competitive balance."

      The ADUO system allows underperforming engine suppliers additional development opportunities, such as increased dyno time, flexibility with the budget cap, and even the introduction of new engines if they meet specific performance gaps. Wolff emphasized that this principle needs to be upheld.

      "The fundamental idea behind these additional development opportunities has always been to enable teams that are behind to catch up, rather than surpass the front-runners," he explained. "It must be crystal clear that any such decision could significantly affect the competitive landscape and championship battle if not implemented with total precision, clarity, and transparency."

      While Wolff did not specify the manufacturer, he strongly suggested that only one engine supplier—widely believed to be Honda—truly qualifies for support. "Regarding the others, they're all in a similar sandbox. The performance figures are quite comparable."

      He also highlighted that Mercedes has thorough internal data backing its perspective. "We possess accurate internal analytics on the performance of both our competitors’ engines and our own. I believe the FIA is reviewing the same data. And I genuinely hope they will continue to prioritize maintaining the sport's integrity."

      Timing is crucial, with initial ADUO decisions anticipated before the Monaco or Barcelona races. Ferrari's team principal, Frederic Vasseur, has already indicated that the system could help the Italian team "close the gap," raising concerns in Brackley that the mechanism might evolve into something beyond just a safety net. "There is no space for trickery here," Wolff asserted.