Mercedes GP team Principal Ross Brawn believes that the fundamentals of this years Mercedes car are sound and that with constant and little improvements the car can be consistently fast and challenge for podium positions.  His believes that the form shown by Mercedes in China last time out is genuine and that he expects the car to go well in the upcoming race at Istanbul.  Nico Rosberg is also optimistic of Mercedes’ chances after having looked like he could win the race in China.