Lewis Hamilton has been out in LA ahead of the first race of the season . Hamilton chauffeured younger brother Nicolas around town in his Cobra . Mercedes driver has won three of his four races this calendar year . Reigning champion heading to Santa Monica ahead of Spanish Grand Prix . Nicolas Hamilton preparing for the British Touring Car Championship .
Lewis Hamilton has been out in LA ahead of the fifth race of the season . Hamilton chauffeured younger brother Nicolas around town in his Cobra . Mercedes driver has won three of his four races this calendar year . Reigning champion heading to Santa Monica ahead of Spanish Grand Prix . Nicolas Hamilton preparing for the British Touring Car Championship .