Mercedes boss Toto Wolff has indicated the manufacturer would support a significant adjustment to F1’s new power unit regulations from the 2027 season.
The incoming 2026 engine rules are built around a 50:50 power split between the internal combustion engine and upgraded 350kw battery systems.
However, early races under the revised package exposed several weaknesses, particularly during qualifying sessions, where drivers were unable to run flat-out consistently because of energy limitations.
The issues led to widespread criticism over excessive super-clipping and lift-and-coast driving techniques, prompting senior Formula 1 figures and Power Unit Manufacturers to explore possible revisions.
Temporary fixes were introduced for the Miami Grand Prix, though discussions have continued over a more permanent solution.
A proposal has emerged to alter the balance to a 60:40 split in favour of the ICE from 2027 onwards, reducing the reliance on battery deployment. Wolff confirmed Mercedes would back the adjustment, despite Mercedes HPP currently supplying the class-leading power units on the grid.
Any amendment would require approval through a supermajority vote involving Formula 1, the FIA, and the five registered PUMs – Audi, Honda, Ferrari, Mercedes HPP, and Red Bull Powertrains. Honda has signalled it is willing to accept whatever decision the FIA reaches.
“Well, it is easier to talk from my position, but I think the races are pretty entertaining,” Wolff told media.
“Obviously, the Montreal track layout helps in terms of energy, but I think the changes that we have anticipated, all of us, in adding more power and helping the energy deployment, these are good changes.
“They mean a compromise from each of the engine manufacturers, but it looks like a sensible approach, but we haven’t voted on them.”
