Kia K900

The new S-Class interior represents a significant shift from previous models. The broad dashboard top gives the impression that it starts at the hood before gracefully cascading down to a center console dominated by a large vertical touchscreen. Mercedes eliminated 27 switches and buttons from the last generation S-Class, leaving a sleek and modern cockpit, but one that may cause more distractions if you prefer using the touchscreen for basic audio and climate control functions.

The virtual instrument panel looks similar to other displays in the Mercedes-Benz lineup, but it features a visually stunning 3D effect. To the driver's eyes, it looks as though the gauges are floating upright, while the information panel between them is set farther back or flat while in map mode. It may not be all that useful, but it certainly turns up the wow factor. The entire cabin is outlined with sharp multicolor ambient lighting that sets the mood but also alerts occupants to possible hazards by flashing red in certain situations. As with previous S-Class models, the quality of materials exceeds expectations even in this prestigious class.

Mercedes' MBUX infotainment system was an immediate hit with us when it debuted a few years ago. This new S-Class gets an updated version with more features, but in some ways, it may also be a step backward. The trace pad found on current MBUX systems is gone, though the driver can control the system via touchscreen, voice, and capacitive pads on the steering wheel. Those who favor the previous trackpads or dial controller may find the new system distracting to operate.

On the plus side, the voice functions are more robust than those in last year's S-Class and give the driver substantial eyes-free control of the MBUX system. A new head-up display will help keep your eyes on the road by appearing to project information in the distance rather than directly in front of the driver. As an added bonus, an augmented reality overlay will superimpose animated arrows when your navigation route has a direction change; in previous MBUX systems, that overlay was shown in the main infotainment screen. Audio prompts for route directions can also be isolated to the driver's headrest speakers so music isn't interrupted for other passengers.

The Mercedes Benz S-Class features different driver profiles to ensure their preferred settings for seat adjustments, mirror positioning, audio presets and so on. Unlike other cars with these features, the S-Class uses a variety of techniques to identify the driver, including facial recognition, a fingerprint scanner or a simple four-digit code.

As expected of a luxury vehicle in this price range, the S-Class offers a full suite of safety features, plus a few other goodies. All of the optional driving aids from the last-generation S-Class are now standard. It also has the hardware needed for hands-free driving, but the system won't be activated until Mercedes is confident it's ready for public use, in contrast to Tesla's approach of using their customers as beta testers. Once approved, the Mercedes' hands-free driving system will be available as an over-the-air update.

The Porsche Panamera has the look and the performance, four doors and a roomy trunk, which help make its case as a daily driver. Its practicality doesn't tarnish its sporting character, though. It's nearly as agile and communicative as the brand's sports cars. Porsche offers the Panamera with a plethora of powertrain options, including a hybris set up and a twin-turbo V8. Cargo space is plentiful under the fastback's rear hatch, and the interior will accommodate four adults comfortably, especially the long-wheelbase Executive models. If you're looking at the entire lineup of Panameras, note that we the top-of-the-line models bearing the iconic Turbo badge separately, same with the Sport Turismo station-wagon versions.

Porsche has given the Panamera a light styling refresh for 2021, incorporating the previously optional SportDesign front fascia as standard across the lineup. The rear end gains an LED strip that runs the entire width of the car, and a new diffuser between the car's dual exhaust outlets provides a sportier appearance. Inside, all Panameras receive an updated steering wheel design with integrated shift paddles. Porsche says it tweaked the chassis slightly to improve ride quality and sharpen handling. New wheel designs and colors— Cherry Red Metallic and Truffle Brown Metallic—are also now offered. Also, lane-keeping assist and traffic-sign recognition can now be found on the standard-equipment list.

Porsche offers the 2021 Panamera in such a wide range of models and prices, your budget and needs should dictate which is best for you. There isn't a dud in the pack, including the base model, which churns out 325 horsepower and starts below $100,000. We love the Executive models, which feature a longer wheelbase and offer considerably more rear-seat legroom than the standard body. For our part, we feel the Panamera 4S strikes the best balance between performance and value, with its 440-hp twin-turbo 2.9-liter V-6 and standard all-wheel-drive system.

Porsche also offers an endless selection of options, but don't skip the adaptive air suspension, which improves the hatchback's ride and handling, or the Sport Chrono package. The latter adds a Sport Plus setting with launch control and dials up the response and performance of the Panamera's engine, transmission, and chassis.

With agile handling and a smooth ride, especially when equipped with the optional adjustable air suspension, the 2021 Panamera is a thrill to drive. It also provides the comfort and luxury expected of such an expensive four-door hatchback. Every Panamera comes with a boosted engine, but only some wear the Turbo badge. We review those models separately. The base rear-wheel-drive Panamera and all-wheel-drive Panamera 4 feature a 325-hp turbocharged 2.6-liter V-6. Under the hood of the considerably quicker 4S model—60 mph in 3.6 seconds—is a 440-hp twin-turbo 2.9-liter V-6. Upgrading to the GTS gives you a 473-hp twin-turbocharged 4.0-liter V-8.

It's the best performing of the non-Turbo line; however, its suspension sacrifices some ride quality in the name of handling. Porsche also offers plug-in Panameras, with a 455-hp powertrain in the 4 E-Hybrid and a 552-hp setup in the 4S E-Hybrid. Buyers looking for an allelectric Porsche should check out the new Taycan.