Lewis Hamilton unveils new Mercedes car for 2013

Mercedes drivers Lewis Hamilton and Nico Rosberg unveil the new car they will be driving in this year's Formula 1 championship.

Hamilton joined Mercedes from McLaren during the winter, having spent his entire F1 career to that point with the British team.

Mercedes team principal Ross Brawn describes the car as a "good step forward" and believes Mercedes GP this year will be "a very strong group".