While Red Bull did not score poorly at last Sunday’s Turkish Grand Prix, the team was surprised at how competitive Mercedes was. Sports boss Helmut Marko and team boss Christian Horner are also confident that the engine found something plus for the Mercedes that made it “phenomenally fast” in the straights, even without DRS.

It is a worrying sign for Red Bull that the pace of the defending champion was clearly better in Istanbul, but at the same time there is no calm for Mercedes either. Team boss Toto Wolff says their engines make unusual noises.

“Since the start of the hybrid era in 2014, our resources have proven to be the most reliable,” Wolff said. “We’re constantly pushing the boundaries, and now with the increase in mileage, we’ve noticed unusual noises in our internal combustion engines.”

“We don’t fully understand the cause of these yet, and they’ve caused problems in the past. We have engines that are simply broken and we no longer have the ability to redesign parts. ”

“In recent years, balancing performance and reliability has proven to be a crucial factor, and it will continue to do so as we move forward.”