The car, in the hands of both Mark Webber and David Coulthard, is seen to have point-scoring pace, highlighted by Webber's series of top-ten qualifying positions and Coulthard running fastest in the pre-race Barcelona testing. The design is distinctly Adrian Newey, bearing a resemblance to past cars such as the 2005 McLaren MP4-20. However, like the McLaren, poor reliability and mechanical problems have hampered the drivers on numerous occasions. Problems included things as trivial as faulty brake pedals and notoriously jamming fuel-flaps. However the most pressing reliability issue was the introduction of a seamless-shift gearbox to the car, which resulted in numerous race retirements for both Mark Webber and David Coulthard, such as at the Monaco and Canadian Grands Prix respectively.