Could it be that a baby Cadillac will actually be born? While the CTS franchise has been a runaway hit, it isn't the entry level product that some have imagined for Cadillac. In Europe, the slow selling BLS has fit that bill, but it isn't quite the car that GM foresees for the US market. Instead, a true entry level Cadillac billed "ATS" is being planned, but not much is known about the vehicle. What GM has said is that the ATS will be aimed squarely at the BMW 3 Series while the CTS will continue on as a 5 Series fighter. 2013 Cadillac ATS: Why It's Lighter Than The BMW 3-Series. ATS Compact Luxury Sport Sedan. 2014 Cadillac ATS Interior Bose Technology. 2014 ats interior details. 2014 cadillac ats v artists rendering photo.