 Complete the following phrase:  Mercedes-Benz rejoined Formula One as a team in after having purchased the Brawn GP team on 16 November 2009. On 21 December 2009 it signed a 30 million per season contract with Petronas as title sponsor. The blueish green livery color of Petronas is just present as fine lines at the side of the car, which overall is mainly painted in silver like historic Mercedes race cars of the 1930s and 1950s. To celebrate their 125th anniversary in motorsport, Mercedes-Benz decided to launch a special one-off livery for the 