MCLAREN DEMAND THOROUGH PROBE

Brown says questions remain over Red Bull's set-up; Horner responds with 'paranoia' jab

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McLaren boss Zak Brown warned on Oct 18 of "massive consequences" if champions Red Bull were found to have breached Formula One rules on adjusting car setups during closed parc ferme conditions.

Red Bull have confirmed the presence of a ride-height device in their cars but said it could not be accessed once the cars were fully assembled.

The team have agreed to make changes after discussions with the governing International Automobile Federation (FIA), with the device likely to have seals attached to it.

Brown said at the United States Grand Prix there were still questions to answer.

He said Red Bull's statement was carefully worded, with cars not always "fully assembled" in parc ferme conditions and particularly when issues of driver comfort needed to be addressed.

"What doesn't quite stack up is the comment that you can't modify it," he told Sky Sports. "If it's not accessible post or during parc ferme, then why put a seal on it?

"I think it needs to be a very thorough investigation because if you touch your car from a performance standpoint after parc ferme or in parc ferme, that is a black-and-white material, substantial breach which comes with massive consequences."