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Mercedes boss Toto Wolff has called on the FIA to investigate Red Bull‘s height-adjusting device in the wake of the United States Grand Prix.

Last week, the reigning champions announced they had made alterations to their car following discussions with the governing body.

Wolff, however, wants the FIA to take things further.

He said: “I cannot speak for the FIA at all. I cannot speak for Nikolas [Tombazis].

“Obviously, that’s something that’s been not spotted for a long time.

“I think the leadership of the FIA is going to look at that and say: ‘What are we doing with this?’.”