It was driven by 2009 World Champion Jenson Button and Sergio Pérez,[5][6] the latter joining the team after Lewis Hamilton moved to Mercedes.[9] The car was launched on 31 January 2013,[7][10] as part of the team's fiftieth anniversary celebrations.[11] It was also the last McLaren car to feature major sponsorship from Vodafone, a partnership that flourished for seven years, beginning in 2007 on the MP4-22.