Ferrari, fined $100,000 for manipulating the result of Sunday's German Grand Prix, escaped further controversy after being cleared of using an illegal flexible front wing.
International Automobile Federation (FIA) technical delegate Jo Bauer issued a statement after the race saying the front wings had been checked and found to be in conformity with the rules.
McLaren's Martin Whitmarsh had cast doubt on both the Red Bull and Ferrari cars after being shown photographs that indicated the front wings were flexing to give greater grip into high speed corners.
The team boss said he did not know whether they were legal but "on the pictures I was shown this morning I, nor our engineers, can explain... it looks unusual.
"I have spoken to Ferrari about it because they live next door and I went to see them this morning and said 'This is what I've been shown and it looks odd'."
Whitmarsh said he planned also to raise the issue with Red Bull team boss Christian Horner but there was no question of any protest.
"We'll see what's permissible in front wings, whether we need to emulate it or whether people will be prevented from doing so," he added.
"You can visually see what's happening, by whatever means it is achieved if it is by some clever and legitimate way, then we need to learn it very quickly."
Ferrari team boss Stefano Domenicali shrugged off the speculation: "I've seen some pictures of the wing but you could see that they were taken from very different angles," he told reporters.
"So, I don't have anything to say on that. I feel that is part of the pressure, part of the game."
(Editing by Pritha Sarkar; To query or comment on this story email email@example.com)