Red Bull will decide on their future partner after Austiran GP.
May 28 (GMM) Red Bull is flirting with a change of engine supplier, according to reports on Wednesday.
Dr Helmut Marko has told Germany's Sport Bild that the reigning world champion team will assess the progress made by current supplier Renault at the time of its home Austrian Grand Prix at the Red Bull Ring in June.
"We have to decide on our future engine partner then," he said.
A partnership with Mercedes has already been ruled out, and becoming a customer of another arch-rival, Ferrari, must also be seen as highly unlikely.
There might be another way.
Red Bull already has close commercial ties to Volkswagen, the German carmaker giant.
"Volkswagen is already in other racing series, with engines that are similar to Formula One technology," said Marko.