Red Bull has issued another warning it will quit Formula 1 with Helmut Marko claiming the team will only remain if they can be competitive, or if Audi joins forces. The former world champion squad has struggled to match recent heights having been hit with a string of performance and reliability concerns caused by its Renault hybrid power unit. Red Bull has not hidden its frustration with partner Renault this season having offered a quit threat earlier this year. However, the squad’s motorsport advisor Marko has again voiced the team’s power unit frustrations, suggesting a possible arrival of Audi as a partner would prevent Red Bull leaving the sport. Talk of the German manufacturer...
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