We all know it is very difficult to become a leader in its class but it's even harder to remain the leader, just that for years managed the BMW with 3 Series. How is the new 3 Series (335i) good compared to the competition brings Motor Trend in its video. In this case competitors to BMW 3 Series are the new Cadillac ATS 3.6 and Mercedes C350. Which of them is the world's best sports sedan?