Mercedes will not open any discussions with Red Bull about a possible Formula One engine supply until Renault's future in the sport is clear, the German carmaker's motorsport director Toto Wolff said on Saturday. With speculation swirling at the Belgian Grand Prix that Red Bull are seeking an early exit from their partnership with Renault, if their current engine partners do not decide to quit anyway, Wolff remained guarded. "We said, and this is still the situation, that we will not interfere into an existing relationship for many reasons," the Austrian told reporters. "Legally, we don't do this and it's not the way we approach business in general and then you must not...
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