The cabin is roomy, thanks largely to the efficient shape of the exterior: the chassis is pushed out to the wheels, and the wheelbase is long, leaving 106.6 cubic feet (SAE standard) inside. The 60/40 split rear folding seat, with a folding center armrest and integrated cupholders, offers a relaxing 40 inches of legroom, although because it's rear-wheel drive the driveshaft tunnel on the floor down the center of the car has returned. The door openings are extra large, making climbing in and out noticeably easier and more pleasant.

It's a very clean cockpit. Our 300C had a satin silver center stack, which was elegantly functional, nothing decorative about it. We felt blessed not to have to play games with the controls and switchgear to get them to function. There are two horizontal rectangular climate vents on either side of an analog clock, above the sound system and climate system controlled by four simple knobs. The 300C steering wheel is a nice four-spoke design with tortoise shell trim making a gradual arc along the top, like a Mercedes-Benz wheel. The four gauges are round, clear and pleasing to the eye in a balanced layout, with black numbers and needles on a white background, almost Italian-looking. From the driver's perspective, it's all good.

There is a gated shifter for the AutoStick, forward of which is a marginal fast food bin, but the console is nice and deep, with coin holders and deep cup holders.

Our leather interior was a subtle two-tone beige and gray, and the seats were on the firm side but comfortable (again, Mercedes-like), although they could use more side bolstering in the 300C which has the engine and tires to corner harder. They are elevated by 2.5 inches, as this is the thing to do nowadays because buyers like to sit high, but because the door sills are also high for safety, it's a good overall relative fit. Because the windshield rake is relatively modest, visibility forward is enhanced over that very long hood. Visibility out the rear is also excellent, without much intrusion from the roofline.

The trunk of the 300 holds 15.6 cubic feet, and opens forward to the fold-down rear seat, so the ability to tow a boat and carry all you need is there. A European-style safety innovation can be found in the trunk. The well in the cargo floor, holding the spare tire, is built at an angle, so if the 300 is crashed into from the rear, the tire will rotate upward allowing the frame structure to deform as designed.