BMW has a good middle ground, resistance increases if you go to the edge of the lane and if you almost touch the lines the wheel vibrates. That means you're sti

BMW has a good middle ground, resistance increases if you go to the edge of the lane and if you almost touch the lines the wheel vibrates. That means you're still consciously steering but it's easier because the car has a tendency to follow the lanes just as any wheel has a tendency to return to center after a turn. But if you let go of the wheel it wouldn't keep a lane.