Mercedes introduces first major upgrade

Mercedes arrived in Canada with its first significant upgrade package of the 2026 season, then headed to Monaco with development still moving on the W17. Formula1.com and Autosport both reported the Montreal package as Mercedes’ first major step of the year, and the team’s pace backed that up when Kimi Antonelli won the Canadian Grand Prix. Ferrari reached Monaco facing a different problem. Lewis Hamilton said after Canada that the SF-26 was “massively down” on power compared with Mercedes, and PlanetF1 reported Ferrari was expected to qualify for the FIA’s Additional Development and Upgrade Opportunities scheme, known as ADUO. ### What did Mercedes actually bring in Canada? (formula1.com) The Canadian Grand Prix was the first weekend Mercedes introduced a substantial new package in 2026, according to Formula1.com and Autosport. George Russell said before the event that Mercedes would bring its first significant upgrade of the season, while Autosport described it as the team’s first major package of the year. (planetf1.com) Montreal then gave Mercedes immediate evidence. Kimi Antonelli topped the sole practice session in a car Formula1.com said was running the team’s substantial upgrade package, and he went on to win the race for a fourth straight Grand Prix victory. (formula1.com) ### Why is Ferrari talking about a power deficit? Lewis Hamilton put the issue plainly after Canada. PlanetF1 reported that Hamilton complained over team radio about a lack of power in Montreal and later said Ferrari was “massively down” on Mercedes in straight-line performance. Hamilton also linked that weakness to track type. (formula1.com) He said Monaco could be different because it is “the one track that power is not king,” and added that Ferrari’s car “could be really strong there” if the team starts the weekend in the right place. ### What is ADUO, and why does Ferrari care? The FIA defined ADUO on May 13 as “Additional Development and Upgrade Opportunities,” a mechanism in the 2026 regulations that allows some power-unit manufacturers to improve a homologated engine during the season or the following one. (planetf1.com) The FIA said a manufacturer whose internal-combustion engine trails the best-performing ICE by at least 2% qualifies for that relief. Nikolas Tombazis, the FIA’s single-seater director, said ADUO is not “a kind of balance of performance mechanism” but a cost-cap relief measure that gives a lagging manufacturer more room to develop. PlanetF1 reported Ferrari was expected to be in the first batch of eligible manufacturers, along with Audi and Honda. (fia.com) ### How big was Mercedes’ edge in Canada? Montreal produced both the result and the gap. PlanetF1 reported Hamilton finished more than 10 seconds behind Antonelli’s Mercedes, and Formula1.com said Antonelli’s win extended his championship lead after a fourth consecutive victory. The contrast was not only in race pace. (fia.com) The Athletic, as cited in the source briefing, reported Mercedes held a straight-line speed advantage in Canada even where Ferrari was stronger in slower corners, reinforcing Hamilton’s account of the deficit. ### Why does Monaco matter more than Canada for Ferrari? (planetf1.com) Monaco changes the emphasis because power matters less there than in Montreal. Hamilton said that directly after Canada, and Mercedes’ own Monaco event page identifies the Circuit de Monaco as round six of the championship, the next stop after Antonelli’s win. (planetf1.com) June 5-7 is the next test. Mercedes arrives with momentum from Canada, Ferrari arrives looking to limit the effect of its straight-line deficit, and the FIA’s ADUO eligibility decision remains part of the backdrop as the Monaco weekend begins. (mercedesamgf1.com) (planetf1.com)