Toto Wolff has strongly defended the performance of the Mercedes power unit after the 2026 Belgian Grand Prix, admitting that reliability and energy-deployment problems continue to cost the team points while appearing to direct a pointed remark towards Ferrari. The Mercedes team principal maintained that he would rather solve the weaknesses of a powerful engine than attempt to extract more performance from a fundamentally slow power unit or car.
The aftermath of the Belgian Grand Prix largely revolved around Mercedes, the strength of its Brixworth-built power unit and the reliability concerns that have accompanied it. The engine’s performance helped Andrea Kimi Antonelli prevail in his direct fight with Charles Leclerc for victory, but the same power-unit package also came under scrutiny because of the recurring problems reported by George Russell.
Mercedes power problem contributes to George Russell’s difficult start
George Russell was forced to retire after making contact with Lewis Hamilton on the opening lap, but the British driver had also complained about a lack of power on the Kemmel Straight immediately after the start. The issue caused George Russell to be swallowed up by the cars behind him and contributed to the sequence of events that eventually led to the collision with his former Mercedes team-mate.
The problem was particularly significant at Spa-Francorchamps, where electrical deployment and power-unit energy management played a central role throughout the weekend. The FIA’s revised Spa energy-management restrictions had already increased the importance of using the available electrical power efficiently across the circuit’s long full-throttle sections.
Speaking to Sky Sports UK and Sky Italia, Toto Wolff defended the power produced by Mercedes and responded confidently to criticism surrounding the reliability of the manufacturer’s 2026 power units. His comments appeared to contain a thinly veiled dig at rival manufacturers, particularly Ferrari, whose engine has not matched the outright performance of the power unit used by the team currently leading both world championship standings.
Toto Wolff admits Mercedes was entirely responsible
“We had a problem on all the Mercedes engines: we were lacking power on the straights. That penalised him heavily,” Toto Wolff said, referring to George Russell. “And that is 100% our fault.”
The Mercedes team principal acknowledged that the team had repeatedly failed to maximise its potential despite possessing what he regards as the strongest overall package.
“We are doing our best as a team. We have the most powerful power unit and a strong car capable of winning. Everyone is giving their maximum to minimise the mistakes, yet they continue to happen because we are human beings.”
Toto Wolff then reviewed several of the setbacks Mercedes has experienced during the season, highlighting how mechanical and technical problems have prevented the team from establishing a larger advantage.
“We let Kimi down at Silverstone, where George finished on the podium, which was perhaps a better result than could have been expected. Then we had a retirement in Montreal and another one in Barcelona. That partly sums up our season. It is a technical sport, a mechanical sport.”
The Silverstone setback proved especially costly because Charles Leclerc converted the opportunity into victory for Ferrari, keeping alive the debate surrounding Ferrari’s 2026 championship ambitions.
Toto Wolff’s apparent Ferrari dig over engine performance
Despite acknowledging Mercedes’ responsibility for the lost points, Toto Wolff then delivered a forceful defence of the Brixworth power unit. His response suggested that Mercedes considers outright performance a more valuable foundation than reliability alone, because technical failures can be addressed without having to redesign a package that is fundamentally short of speed.
“We have presented a product [power unit] that is genuinely powerful, and I would rather solve reliability problems than try to make a slow engine or a slow car faster,” Toto Wolff said.
Although Toto Wolff did not name Ferrari directly in that part of his answer, the remark appeared particularly relevant to the competitive comparison between Mercedes and Maranello. Ferrari has demonstrated strong reliability with the SF-26, while Mercedes has retained an advantage in outright power-unit performance. The differences between the leading packages were also visible in the technical picture that emerged from the Spa pit lane.
“We are giving 100%, and we need to continue doing that because we have lost many points due to reliability problems. We should be much further ahead than we are,” Toto Wolff concluded.
Mercedes therefore left Belgium with contrasting emotions. Andrea Kimi Antonelli’s victory demonstrated the performance available from the W17 and its power unit, but George Russell’s retirement and the continued energy-management concerns again underlined the technical weaknesses that have prevented the team from converting all of its potential into championship points.
For Ferrari, Toto Wolff’s comments serve as both a warning and a source of encouragement. Mercedes continues to possess the performance benchmark, but its reliability problems have kept the championship closer than the team principal believes it should be.
