Rosberg hindered by teething troubles

Nico Rosberg says Mercedes still needs time to see the real potential of its car following two troubled days of testing at Valencia.

Source: http://www.inracingnews.com/formula-one-news/f1-formula-one-news/rosberg-hindered-by-teething-troubles/

Romain Grosjean Olivier Grouillard Brian Gubby André Guelfi Miguel Ángel Guerra