Red Bull/Getty Images Renault believes that the majority of problems that affected its customer teams at the Australian Grand Prix have been fixed. Renault suffered a difficult time in Australia as Red Bull's Sebastian Vettel retired due to a power problem, while both Lotus and Caterham drivers retired due to mechanical issues. But head of track operations Remi Taffin insists that Renault has made progress ahead of this weekend's Malaysian Grand Prix, although he remains wary that Sepang presents a challenge to the power units. "After a difficult race in Australia we are really looking forward to Malaysia," he said. "We had several issues across the cars in Melbourne but we...
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