Toto Wolff has admitted he is worried about the reliability of Mercedes' new engine. Dominant so far in 2019, Mercedes has waited until Montreal to introduce an updated power unit. It is being used by all six Mercedes-powered cars in Canada. But the engine in Lance Stroll's Racing Point failed in spectacular fashion on Saturday. 'We had a big problem with the engine at Racing Point,' Wolff, the Mercedes boss, admitted. 'We do not yet know what happened but it was a brand new engine,' he said. 'We need to study it and cross our fingers that it doesn't happen on our cars.' For the first time in 2019, Ferrari's Sebastian Vettel is on pole. Insiders say it is because the long straights favour...
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