The four teams who unsuccessfully objected to the legality of the 'diffuser 3' cars will not now take the matter further.

The four teams who unsuccessfully objected to the legality of the 'diffuser 3' cars will not now take the matter further.

Ferrari, Renault, BMW and Red Bull took the matter all the way to the FIA's International Court of Appeal, arguing that the diffusers of the Brawn, Williams and Toyota teams contravene the 2009 rules.

The FIA court begged to differ, raising the prospect that the four unhappy teams would take the matter even further -- perhaps to the French civil courts.

But BMW's Mario Theissen said on Wednesday: "We will accept the decision of the International Court of Appeal."

The anti-diffuser teams insist the ruling has ramped up cornering speeds, contradicted the work of the Overtaking Working Group, and forced most F1 teams into expensive and significant mid-season car changes.

But, like BMW, Ferrari said it will also now simply work to rush out a version of the offending aerodynamic design.

"This decision forces us to intervene on fundamental areas of the car's design in order to be able to compete on an equal footing with some of the teams from a point of view of the technical regulations," the Italian team said.

Red Bull team boss Christian Horner was quoted by the German press as also vowing to reluctantly "accept" the ICA ruling.

 

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