German GP polesitter Nico Rosberg admitted he had his own brake concerns during qualifying at Hockenheim despite using a different supplier to team-mate Lewis Hamilton, who suffered a disc failure in Q1. It emerged on Saturday evening that while Mercedes had fitted fresh brake discs to both of their cars ahead of qualifying, Hamilton's side of the garage had opted to switch from Carbon Industrie to Brembo material while Rosberg stuck with the former.Hamilton qualified only 15th after a right-front disc failure sent him spiralling into the barriers in Q1 and could yet have to start Sunday's race from the pitlane if Mercedes can't convince the FIA that a change of brake supplier for safety...
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