Lewis Hamilton puts the first laps on the Mercedes car he hopes will make him world champion for the fourth time in 2017.
Mercedes driver Lewis Hamilton says fan engagement is the key to the sport's survival after testing the car he hopes will make him world champion for the fourth time in 2017.
Mercedes driver Valtteri Bottas says that there could be "sparks" between himself and team-mate Lewis Hamilton during the coming season.
Force India aim to break into the Formula 1 constructors' championship top three for the first time after launching their 2017 car.
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Jennie Gow is joined by Mercedes boss Toto Wolff and deputy team principal of Williams, Claire Williams, to look ahead to the 2017 F1 season.
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