Gerhard Berger:
"That he is tired of Formula 1, I think is wrong," Berger told the Austrian broadcaster ORF.
"Of course, he isn't happy with the current situation of his team," the F1 legend added, saying the reason is linked to the 'power unit' era.
"But Red Bull is still a super strong team, and even in this difficult time hardly anyone has left, especially Newey at the top.
"Not having an engine that can bring title chances is of course frustrating in the long term," Berger added.
"Red Bull has always had patience, and now is when it's needed. It cannot always go well.
"It's a difficult time now, but you can see the light at the end of the tunnel. Honda coming to Toro Rosso is the start."
Honda's disastrous spell with McLaren in the past three years doesn't appear to worry Berger who firmly believes the Japanese manufacturer will eventually get its act together.
"I believe in Honda, who have a sporting culture in the company, the resources and now a team with the Red Bull mentality.
"I could imagine Honda returning to its original form and building top engines," he added.
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