Sebastian Vettel's spot on the front-row of the Brazilian Grand Prix grid has been put in jeopardy by the Ferrari driver failing to comply with the weighbridge procedure during qualifying.
In Q2, Vettel was directed to the weighbridge during the session as he entered the pitlane, but refused to turn off his Ferrari's engine as required.
The car was subsequently weighed with its engine running, its driver frantically gesticulating to hurry up the procedure as a threat of rain set in.
When the weighing was completed, Vettel drove off the scales under the car's own power, and in doing so, apparently destroyed the rear scales.
FIA technical delegate Jo Bauer immediately referred Vettel to the Brazilian Grand Prix stewards, an action that the Ferrari driver qualified as "unfair".
"They shouldn’t call us when the conditions are changing like that," Vettel told Sky F1.
"I think it’s unfair if somebody gets called in. I wanted them to hurry up."