 Complete the following phrase:  Both drivers were retained for . Rosberg won the first race of the season in Australia, then in Malaysia, Hamilton completed a grand slam leading every lap from pole position, with the fastest race lap while Rosberg completed a 12 finish for the team; it ended Hamiltons nine race streak without a podium finish, and was the first 12 finish by Mercedes as a works team since the 1955 Italian Grand Prix. The team repeated the result at the Bahrain, the Chinese, and the Spanish Grands Prix, while Rosberg and Hamilton finished 12 respectively at the 