Vettel could have the same challenge as Schumacher if wants to help a team make a car fast says Mercedes GP boss Ross Brawn.

Brawn: Perhaps he will make it happen himself, because he will go to another team as he wants them to be successful, and the challenge for Sebastian will be exactly the same as it was for Michael, that you have won two world championships, so what is next? What is the new challenge for me? What is the motivation? For Michael the motivation was to go to Ferrari and make that successful. I am sure Sebastian will look at that because everybody thinks Sebastian is doing a great job, but the Red Bull is a fantastic car. His ambition may take him a different direction, who knows?