With Ferrari bringing significant updates to their car over the first four races, Mercedes needed to respond with a vengeance in Barcelona. The result of this response is what appears to be their real challenger for the rest of the year, as many of the changes to the W08 are to critical areas of the car that require huge resources to develop.  It is no secret that the Silver Arrow has a slight weight problem, somewhere in the region of 5-10kg above the minimum. For Spain there are believed to be a number of areas where the car has lost some excess fat, including the new specification power unit (dubbed as ‘phase two’) and also the gearbox housing, which acts as the rear...
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