Carlos Lago tests the 2013 Cadillac ATS. Ever since its "Art and Science" rebirth, Cadillac has made it clear that they're gunning for BMW. With the 2013 ATS, they locked in on their primary target -- the benchmark BMW 3 Series.Carlos Lago tests the 2013 Cadillac ATS. Ever since its "Art and Science" rebirth, Cadillac has made it clear that they're gunning for BMW. With the 2013 ATS, they locked in on their primary target -- the benchmark BMW 3 Series.