Rosberg explains 2012 changes

Mercedes driver Nico Rosberg explains the major changes to the cars for the upcoming Formula 1 season including stepped noses and longer wheelbases, plus the impact of the ban on exhaust-blown diffusers.

Rosberg, who holds the record in Formula 1 for the most points scored without a win, believes the 'platypus' nose "doesn't look great" on the new F1W03, but the longer wheelbase "opens up aerodynamic possibilities" for engineers.

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