Stoffel Vandoorne has expressed some concern as a difficult winter for McLaren continues. After a troubled opening test, the British team’s new Renault-powered car struck more problems in Barcelona on Tuesday.

Some of the blame might be Renault’s, with Red Bull also suffering from a battery problem. “This is a normal process,” argued Renault’s Bob Bell. “We’re using all the batteries in testing and choosing the best ones for the rest of the season.”

But as images emerged of the 2018 car featuring emergency cooling at the top of the engine cover, McLaren driver Vandoorne admitted some concern.

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