Helmut Marko with Remi Taffin Renault's 2014 V6 turbo power unit crisis began to ease when the French manufacturer became more open, according to outspoken Red Bull director Helmut Marko.
He revealed during an interview with the Austrian news agency APA that when the depth of the pre-season crisis became clear, he began a series of emergency visits to France.
'We found many errors,' Marko said ahead of the Chinese Grand Prix.
'What annoyed us is that they (Renault) were not open. Now there is a constructive cooperation,' he revealed.
'We are working hard with both Renault and Toro Rosso. The basic mistake was that Renault started work much too late.'
Marko is now hoping the problems were...
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