The ordering guide for the Cadillac CT4-V and CT5-V Blackwing sport sedans has revealed that the cars will have the option to be delivered in a more premium way, unexposed to the elements. This option comes standard on all 120th-anniversary models. Meanwhile, non-anniversary Blackwings have it as an option. Per the official order guide, the Cadillac Blackwing closed carrier delivery option is RPO code “XES” for both models. A closed carrier delivery is perfect for when you want to get a car and be sure absolutely nothing has touched the paint while making its way to the delivery location, whil…