Mercedes chief executive Dieter Zetsche thinks Bernie Ecclestone's public criticisms of Formula One have the potential to do more harm than good for the sport.
That Formula One has become considerably more predictable in recent seasons, has been well documented, and so too has Ecclestone's desire to make the sport more interesting and competitive.
Speaking at a Mercedes E-class presentation in Portugal, Zetsche said: "At the Geneva Motor Show I was not going on the stage to say I would never drive a Mercedes and customers should better not do it."
"I don't understand how someone who is not only the CEO but partial owner of that product talks that way about the product.
"If he feels like that, it should be discussed internally how to change it, but not as a sales pitch," he said.