article_snippet: Nico Rosberg used this without authorisation from Mercedes as Nico Rosberg attempted to pass team-mate Hamilton in last year's Bahrain Grand Prix.
article_snippet: Lewis Hamilton's also used it, again without authorisation, to defend Lewis Hamilton's lead at the subsequent race in Spain.
article_snippet: Lewis Hamilton (centre) celebrates after winning the Formula One Grand Prix Championship in 2014 .
article_snippet: Lewis Hamilton's takes part in the Formula One pre-season first test day at the Circuit de Catalunya, Barcelona .
article_snippet: To talk to his team during Race.
article_snippet: The World Champion during pre-season testing at the Circuito de Jerez in Jerez, Spain earlier in the year .
article_snippet: Pit Confirm sends an automated message to tell the Mercedes crew Lewis Hamilton's is coming into the pits.
article_snippet: Lewis Hamilton's will be hoping Lewis Hamilton's can keep hold of Lewis Hamilton's title during the upcoming Formula One season .