Ron Carter 5-Star Promise: We Deliver Cadillac Test Drives to Your Door, We Will Beat Any other New Cadillac Dealer offer 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.. Does this deal seem too good to be true? It's just our everyday low prices! A perfect cold weather car featuring heated seats. This vehicle's sunroof is the perfect way to accent a road trip. You'll also love this CT6's backup camera, anti-theft system, an air filter for the cabin, extremely convenient cruise control and airbags. Offers to purchase may only be made following purchaser test drive. No dealers.