Ford Motor Co. (F) Chief Executive Officer Mark Fields said that an automaker probably will introduce a self-driving vehicle within half a decade, but it won’t be his company, which is focusing on less expensive features that assist in driving. “Fully autonomous vehicles are a real possibility,” Fields said at a Jan. 5 dinner with analysts and journalists on the eve of the Consumer Electronics Show in Las Vegas. “Probably, in the next five years, you’ll see somebody introduce autonomous vehicles.”