The two are old friends , teenage team mates in karting where they dreamed of one day driving together in grands prix .
Rosberg even gave the 2008 world champion the benefit of his advice before Hamilton decided to leave McLaren and race for Mercedes next season .
The two are old friends , teenage team mates in karting where they dreamed of one day driving together in grands prix , and Rosberg even gave the 2008 world champion the benefit of his advice before Hamilton decided to leave McLaren and race for Mercedes next season .