Mark Webber 's clinches second successes F1 world title . 26-year-old German wins German Grand Prix . Nico Rosberg finishes fourth for Red Bull . Red Bull seal constructors ' title despite Mark Webber 's retirement .
Sebastian Vettel clinches fourth successes F1 world title . 26-year-old German wins Indian Grand Prix . Nico Rosberg finishes second for Mercedes . Red Bull seal constructors ' title despite Mark Webber 's retirement .