FIA bans technology which improves aerodynamics of Lotus cars . Reactive ride-height systems help cars stay low to the track when braking . Raikkonen won the drivers ' championship with Ferrari five years ago , having also raced for the British marque McLaren and Switzerland-based Sauber . Formula One driver Finn takes to the track for the first time since 2009 . The 2007 world champion tests the team 's 2009 car at private event in Valencia .
FIA bans technology which improves aerodynamics of Lotus cars . Reactive ride-height systems help cars stay low to the track when braking . Formula One driver Finn takes to the track for the first time since 2009 . The 2007 world champion tests the team 's 2009 car at private event in Valencia .