"The dialogue has started and will continue to evolve," Marchionne said. "We have time until 2020 to find a solution which benefits Ferrari. The threat of Ferrari leaving Formula One is serious. The agreement with Sauber expires in 2020-2021, right when Ferrari could leave.
Source : http://www.nydailynews.com/newswires/sports/marchionne-ferrari-quit-f1-proposed-article-1.3672450