Mercedes is to make changes to the locking mechanism of its headrest in time for the Austrian Grand Prix in a bid to ensure there is no repeat of the problem that cost Lewis Hamilton victory in Baku. Hamilton looked on course to take the win in Azerbaijan before a loose headrest forced him into the pits for a replacement. That incident dropped him down the order, although he was able to recover some ground and finish fifth overall – one place behind title rival Sebastian Vettel. Mercedes has spent time at its Brackley factory this week looking into exactly what went wrong and has concluded that the length of the locking pins at the back of the headrest – where it attaches to the car –...
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