Mercedes Cost-Cap Claim Draws Stella Doubt

Mercedes team principal Toto Wolff says the championship leaders cannot match McLaren and Ferrari’s current upgrade pace within Formula 1’s cost cap, but McLaren boss Andrea Stella is convinced more performance is still waiting to emerge from Brackley.

Speaking after the Dutch Grand Prix at Zandvoort, Wolff said Mercedes had no scope to accelerate its development plan for the W17. “We haven't got the money to put developments on the car,” he said. “We are trying to evenly split that through the season, based on our calculations of when we can bring the biggest updates and optimising the championship points. But we just can do what we can do.”

The issue has become more acute as Mercedes’ early advantage has narrowed. The team won the first six races of 2026 but only two of the next six, while McLaren and Ferrari have taken two victories apiece. Lando Norris has won the last two rounds in Hungary and the Netherlands following McLaren’s recent major upgrades.

Mercedes has not introduced a major W17 package since the Canadian Grand Prix in May. FIA declared-upgrade figures list Ferrari with 40 new components, Red Bull and McLaren with 38 each, and Mercedes with 24, although those totals do not reflect the widely different costs of individual parts.

Stella, McLaren’s team principal, did not accept Wolff’s explanation. “I would like to believe you, but I actually don't believe you,” he said. Stella pointed to a $3 million allowance available to all teams in 2026 cost-cap reporting because of the 2027 power-unit rules, and predicted Mercedes would turn wind-tunnel gains into upgrades for its race car.

Wolff said the picture would have looked more secure without reliability problems that cost Mercedes between 50 and 100 points. Even so, Kimi Antonelli’s second place behind Norris at Zandvoort leaves him 59 points clear of George Russell and Lewis Hamilton, with Norris 83 points behind. Mercedes retains substantial championship margins, but its ability to protect them is now being tested by McLaren’s faster development curve.