Wolff reveals new engine issues behind Russell’s Spa struggles

Mercedes identifies two separate energy problems at Spa

Toto Wolff has provided further detail on the engine problems that compromised George Russell’s Belgian Grand Prix weekend, distinguishing between a qualifying deficit and a separate race-day failure.

According to the Mercedes team principal, the problem likely accounted for around half, or slightly more, of Russell’s qualifying gap to Antonelli. Wolff added that the issue should have been more difficult to detect at the next venue, Budapest, because that circuit is not as energy-starved. Its exposure at Spa therefore gave Mercedes a clearer indication of the underlying problem.

The issue was also quantified in performance terms. Wolff said Russell had more energy available at the beginning of the lap and less at the end, creating an overall optimisation deficit of approximately two to two-and-a-half tenths in qualifying modes. The loss was described as much smaller over long runs.

A separate power loss ended Russell’s race

Russell’s race was affected by a different problem. On the opening lap, he suffered a sudden loss of power out of Turn 1 and was “swallowed” on the run to Les Combes. He subsequently collided with Lewis Hamilton and retired.

Wolff stressed that this was unrelated to Russell’s earlier complaints, calling it “a new thing” that would not have been identified on the simulator without specifically searching for it.

The Turn 1 problem was not limited to Russell. Wolff revealed that all eight Mercedes HPP-powered cars experienced a lack of energy at that point, although it affected Russell more severely than Antonelli. The younger Mercedes driver also lost ground as a result, failing to emerge at the end of the straight in third place and instead dropping to fifth.

The consequences were significant for Mercedes: Russell lost the chance to score, while Antonelli surrendered two positions. Wolff also highlighted the impact of the collision with Hamilton, describing the lost points as unfortunate both for Russell and for the constructors’ championship.

The disclosure follows earlier analysis of Russell’s power deficit at Spa, but Wolff’s latest explanation makes clear that Mercedes was dealing with two distinct energy-management problems across the weekend.