Norbert Haug, Mercedes Motorsport boss, says it is their goal to have a German driver in a Mercedes in 2-4 years. Merc made a bid at Rosberg and Vettel which failed and left them with Heikki teaming Lewis. He still suggests that Vettel would be a good choice:
“I think he is very genuine and already a very, very strong driver,” the German said. “He combines his talent with his work in a way that very few do. There is certainly a similarity with Michael Schumacher.”
Having said all of this, I am not sure having Lewis and Vettel is such a good idea. McLaren have Lewis and not too many drivers are going to want to sign up for the Alonso treatment plan so if Vettel is smart, and I think he is, he will look to Ferrari or BMW to get a drive. Then take it to McLaren. That’s my hunch, what’s yours?