Renault rushed to fix a problem with their new Formula One power unit on Wednesday after Red Bull's world champion Sebastian Vettel wrapped up his first pre-season test early with barely any laps completed. While the three Renault-powered teams testing in Jerez struggled to put laps on the board, German driver Nico Rosberg completed an impressive 97 in his Mercedes - including one unbroken 24-lap stint. Ferrari also appeared to be making steady progress, with 2007 champion Kimi Raikkonen getting 47 laps under his belt in the new F14 T car. Champions Red Bull called time on the second day with hours remaining so Renault could fix a problem with the energy store on their RB10 car. Sister...
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