Exterior

Designed with a chiseled look, the four-door STS features what Cadillac says is a "faster profile" with "more rake" than the CTS. All told, it's considered "more sophisticated, a little smoother, a little cleaner, a little more grown up" than the CTS, according to lead designer Kip Wasenko.

Cadillac styling touches include a wide "airfoil" grille with dual horizontal slats, a "dihedral-shaped" hood and vertically stacked headlights that consist of twin projector units. Bodysides are devoid of decoration. LED taillamps bring up the rear and have indirect optics to provide a more even lighting pattern than traditional LEDs.

Built on a 116.4-inch wheelbase, the STS is 196 inches long overall, 72.6 inches wide and 57.6 inches tall. Body-panel gaps promise close tolerances, and the deck lid is made of aluminum. The STS comes with either 17- or 18-inch wheels.

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    Fuel System Messages
    FUEL LEVEL LOW This message displays when the vehicle is low on fuel. Refill the fuel tank as soon as possible. A chime may sound when this message displays. See Filling the Tank. TIGHTEN GA ...

    Exterior
    The ATS looks good on the road. You never can tell for sure at an auto show, where I thought the headlights were too slit-like, and I wasn't sure about the hump in the trunk lid, accented as it is ...

    Treadwear
    The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would w ...