The device, which allows Mercedes drivers to adjust the toe angle of the front wheels through pushing or pulling the steering wheel, has grabbed the attention of rival teams.

But while most understand how it is allowed by the technical regulations for 2020, there appears to be some question mark about whether or not it complies with F1’s rules that limit what teams can change after qualifying starts.

Renault’s sporting director Alan Permane said: “We don't know what it is doing. James Allison [Mercedes technical director] and his men have done something clever, and undoubtedly they think there is plenty of lap time in it.

“I'm sure they've been through it with probably Nikolas [Tombazis], the FIA and his guys and are happy it's legal. I agree.

“There's probably a parc ferme question ma

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