This is the 556bhp Cadillac CTS-V Sport Wagon, which will go on sale at the end of this year.
The car is powered by the same 6.2-litre V8 with 551lb ft of torque as its coupe and saloon stablemates, and comes with the choice of six-speed manual gearbox or a six-speed automatic.
It also gets the same performance enhancing kit as the other CTS-V cars, including Magnetic Ride Control, Brembo brakes and Michelin Pilot Sport PS2 performance tires mounted on 19-inch forged aluminum wheels.
It's load carrying capacity is almost twice that of the saloon - 720 litres seats up, or 1644 seats down.
Cadillac has confirmed the car will be sold in Europe and the Middle east, as well as the US.