Apple Inc. (AAPL) said technology letting drivers use iPhones with voice commands or steering-wheel buttons will be available in vehicles as early as this year.

Fiat SpA (F)’s Ferrari supercar division, Daimler AG (DAI)’s Mercedes-Benz luxury unit and Volvo Car Group will show customers the CarPlay system this week, with other auto producers introducing it later, Cupertino, California-based Apple said in a statement today. CarPlay will be available as an update to the iOS 7 mobile software on iPhones, and works with the Siri voice-recognition feature.