Fully self-driving cars are still a few years away, but Mercedes-Benz makes a leap forward with features in the new 2017 E-Class, its midsize luxury sedan and one of its best-selling models. All the basic stuff you'd expect in a German luxury car is there, such as adaptive cruise control, plenty of airbags, and the system that helps protect passengers if the car determines an accident is imminent, tightening seat belts and aggressively braking the car. This feature includes a lane change feature. Once you've set the cruise control, you can use the turn signals to make the car change lanes without your intervention. It will make the change as long as the car doesn't detect a vehicle in the adjacent lane or one approaching at a high rate of speed, which it can determine using its long-range rear-facing radar.