Ron Carter 5-Star Promise: We Deliver Cadillac Test Drives to Your Door, We Will Beat Any New Cadillac Deal by $1,000, We Will Buy Your Car for $500 More Than Anyone, Loaners for Owners Delivered to Your Door. See Ron Carter for details. The CT6 competes with full size luxury cars such as the BMW 7-series, the Audi A8 and the Mercedes-Benz S-Class.. Why look any further? A perfect cold weather car featuring heated seats. This vehicle is going to fly off the lot. Come see it while it lasts! There's nothing like a sunroof on a sunny day! Features include: rear view camera, anti-theft system, a cabin air filtration system, cruise control and airbags.