At least one major car executive is less than concerned about the idea of Apple getting into the automotive game.

Dieter Zetsche, chairman of of Daimler AG and head of Mercedes-Benz, said he isn’t losing any sleep over the rumors of an Apple Car, according to Australian car website Motoring.

“If there were a rumor that Mercedes or Daimler planned to start building smartphones then [Apple] would not be sleepless at night. And the same applies to me,” he said.

Rumors of an Apple Car have been swirling for weeks thanks to reports that the Cupertino tech giant has been hiring engineers for an automotive project. It’s still unclear what an Apple Car might look like, what it would do or if it will ever exist at all. Still, Apple getting into the car industry would be a major new entry to the sector.