Up to 25 percent of cars may soon be fully electric, says Mercedes-Benz USA CEO after automaker invests $1 billion in electric vehicle production. Mercedes-Benz USA CEO Jason Hoff told CNBC on Friday that the automaker's midterm predictions show that up to 25 percent of cars may soon be fully electric. "Some of the midterm horizons that we look at show maybe 15 to 25 percent [of cars] being full electric," the CEO told "Closing Bell." "That's why we believe it's really critic