The changes to this version of the CTS are from the B-pillars rearward. Weighing in at 4212 pounds, the Sport Wagon is 241 pounds portlier than the last CTS sedan we tested. Much of the weight increase can be attributed to the extended roofline, the structural buttressing, and the electric hatch, but some is likely due to the glass roof that came on our test car. So the wagon is heavier than the sedan—a clear disadvantage—but the extra mass is offset by improved weight distribution. Sport Wagons are less nose-heavy than CTS sedans, with 48.6 percent of the mass over the rear wheels versus the sedan’s 46.7 percent. With more weight resting on top of them, the rear tires don’t have any trouble putting the power to the ground.
However, our Sport Wagon’s 304-hp, 3.6-liter 24-valve direct-injection V-6—the base engine for 2010 is a 270-hp, 3.0-liter V-6—did seem somewhat overcome by the extra mass. Running from 0 to 60 in 7.0 seconds isn’t criminal, but the sedan does the deed in six flat. Cadillac folks say that roughly 0.3 second is sacrificed to the weight and another 0.3 is lost to the newly optional and heavier 19-inch wheels and larger brakes of the FE3 suspension. There’s also a revised torque converter that is supposed to increase smoothness and efficiency, and it, too, may have contributed to the Sport Wagon’s off-the-line sluggishness.
The CTS’s excellent handling, brakes, and steering remain untainted. The Sport Wagon’s great advantage over the sedan’s 14-cubic-foot trunk is its beautifully lined, 25 cubic feet of cargo space (53 with the rear seats folded). From the floor rails that provide attachment points for various tie-downs to the perfectly trimmed carpet, Cadillac seems to have created an exact replica of the cargo compartment of the Mercedes E-class wagon.
Unlike the utilitarian Benz wagon, the Cadillac’s crease-intensive sheetmetal gives it an air of sportiness. In fact, we think it’s more attractive than the sedan. And the base version starts at $40,655, or $3100 more than the base sedan. The only option our $54,635 Sport Wagon lacked was all-wheel drive. Even at that price, the Caddy wagon is still less expensive than comparably equipped competition from Audi, BMW, and Mercedes. Nevertheless, we still don’t expect the car-buying public to notice, so the Sport Wagon will remain a well-kept secret for fans of cars with D-pillars. 
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