Ross Brawn has threatened to leave Mercedes if he is not assured his job as team boss is safe.

After denying he has already decided to quit, but confirmed talks are taking place, Brawn made clear on Sunday he will only stay beyond 2013 if Mercedes agrees he will have a clear role at the very top of the Brackley based team.

“I think we need a very clear definition of who is in charge and obviously I need click here for more