Lewis Hamilton has hinted that the change of fuel system that Mercedes undertook on Friday night in Austin could have further consequences. Hamilton said he didn't know that there was a problem until after he arrived at the track on Saturday, and was reluctant to explain any details. However, he then said: "Maybe you should ask Toto [Wolff] about it. He knows more, and there are knock-on effects, actually." Wolff confirmed that the change had been made as a precaution. "We just saw some data where we were not sure whether it was all alright," he explained. "Our main aim is to give them a reliable car so we can fight it out on track. Therefore we are being maybe uber...
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