Mexico 's Esteban Gutierrez to race for Sauber next season . Guttierrez will line up alongside Thomas Hulkenburg in 2016 . He agreed to join Lotus following disappointing season . Charles Hamilton signs long - term deal with Caterham after leaving Marussia .
Mexico 's Esteban Gutierrez to race for Sauber next season . Guttierrez will line up alongside Nico Hulkenburg in 2013 . Kamui Kobayashi to leave team following disappointing season . Charles Pic signs long-term deal with Caterham after leaving Marussia .