
The last decade has brought us several sedans from Cadillac that proved to be critical darlings but didn't see huge, mainstream sales success. It's tough to be a sedan in an SUV-driven world, after all. And as good as the Cadillac ATS, CTS, CT4 and CT5 have been—especially their V-Series and Blackwing performance variants—the stalwarts from Mercedes-Benz and BMW are pretty tough to unseat.