Nico Rosberg said Mercedes would have to work hard to improve the reliability of their new F1 car despite his emphatic win in the season-opening Australian Grand Prix. While Rosberg was dominant in his fully functioning W05, his pole-sitting teammate Lewis Hamilton lasted only four laps before a misfiring cylinder ended his race. World champion Sebastian Vettel was also an early retiree after power problems in his Red Bull, underlining this year's unpredictability as teams grapple with new hybrid technology. "Despite our success, we also know that there is still some work to do," said Rosberg, who streaked away from third on the grid for a wire-to-wire victory. "We saw over...
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