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Mercedes-Benz Concept IAA is a modern silver aero

While we English-speaking folk call it the Frankfurt Motor Show, our German friends call this week's bi-annual confab the Internationale Automobil-Ausstellung, or IAA. At first glance, then, you might think Mercedes-Benz named its Frankfurt concept, the Concept IAA, after the show it'd debut at. But, the Concept IAA isn't named for the show. It's actually an abbreviation for Intelligent Aerodynamic Automobile, and it's very aerodynamic indeed. This four-door coupe can transform, while moving, from its sedan-like design mode to an ultra-sleek, gas-powered fish of a car. This aerodynamic mode has a drag coefficent of just 0.19. That's sleeker than a Tesla Model S, and it ties the rating of the General Motors EV1 electric car. In fact, it's very nearly as aerodynamic as the Volkswagen XL1. The IAA can transform automatically at 80 kilometers per hour (about 50 miles per hour) or via the press of a button. When it enters an aerodynamic mode, eight segments at the back of the car extend out, adding over 15 inches to the overall vehicle length, effectively extending its already tear-dropped-shaped tail. And that's just the most visible aero aid. At the front of the car, flaps in the bumper extend out nearly an inch, while there's a smaller extender in the back bumper. These serve to keep air away from the wheel arches, where turbulence can become an issue. Of course, Mercedes has thought of this, too, fitting "Active Rims" that "alter their cupping from 55 mm to zero," whatever that means. There's even an active aero aid inside the front bumper, where a louver extends backward by 2.3 inches to smooth out the air traveling underneath the car. Outside of its super-slippery mode, the IAA is a relatively handsome four-door coupe, featuring the kind of plunging roofline that wouldn't look out of place on the company's pioneering CLS-Class. The interior is certainly worthy of the CLS, too. It's home to gorgeous white leather and touch-based controls, and in general, looks very luxurious. Mercedes' dogged pursuit of aerodynamics does not mean that the Concept IAA is some gutless ecomobile. Under the skin is a gas-powered, plug-in hybrid system that produces up to 279 horsepower and allows the sleek sedan to hit 155 mph. Its all-electric range is based, of course, on what mode its body is in. It's most impressive in aero mode, where it will cover 41 miles on a single charge. Switch over to design mode, and that figure drops slightly to 38.5 miles.

The most or nothing: Mercedes-Maybach S650 Cabriolet pushes the luxury limits

After the introduction of the Mercedes-AMG GT Roadster at the Paris Motor Show this fall, we informed you that Mercedes-Benz has a convertible conundrum, a surplus of drop-tops that seemingly threatens to self-cannibalize within the brand's ever-proliferating lineup. Benz's head of design, Gorden Wagener, who spends much of his time in Southern California, argues it's not a problem: Each convertible, in its ideal construction, would intrinsically vanquish any issues. "The bad is the enemy of the good," he said, not exactly quoting Nietzsche. Now, the three-pointed star brand has upped the top-down ante, with the unveiling this week at the Los Angeles auto show of the Mercedes-Maybach S650 Cabriolet, a vehicle so opulent, it sits in price and position atop the uber-luxury brand's current top-of-the-line offering, the $247,900 Mercedes-AMG S65 Cabriolet. View 24 Photos "Mercedes-AMG is our performance brand so it's all about performance stuff," says Wagener in a one-on-one interview on the roof of a Beverly Hills mansion just before the new car is unveiled. "Of course, Maybach has power, too, but it's the ultimate in luxury. So it's more on that side. And for me in the interior, it's the haute couture of the automobile, so we tried to up that a little more with details. And on the exterior, it's a more superb appearance up front, more chrome, more rich, and of course we tried to up that branding even more. The S-Class is the best car in the world, we consider, I always thought we could raise the Mercedes brand. And it's the same with the S convertible." Why does Mercedes-Benz need a flagship atop its flagship? Because, when climbing the mountain of automotive luxury there is always the customer who, when he or she reaches the pinnacle, wants more. A car brand, especially one with deep pockets and luxurious heritage like Mercedes, can always further gild the automotive lilies, creating a step up for those for whom the brand's motto, The Best or Nothing, is a literal life credo. "It's always our job to make it better," Wagener says. "Each little detail, the wood, the wood under cover of the cabriolet, the leathers. All the super luxury details that make a luxury car into a super luxury car. The key is to make a modern luxury design and not a traditional luxury design. There is definitely a market for traditional luxury, but we always wanted to have Mercedes, Maybach in particular, as a modern luxury car.

The greenest cars of 2024: Vehicles that use the least fuel and cost less to operate

All-electric vehicles may make headlines for environmental friendliness and fuel efficiency, but the “greenest” car in America in 2024 has a gasoline engine. According to the American Council for an Energy-Efficient Economy's annual GreenerCars ratings of the most environmentally friendly cars, the latest Toyota Prius Prime SE plug-in hybrid tops the list of greenest cars, although it's something of an anomaly, because battery-electric EVs follow it in spots two to five. Of the top 10 vehicles in the ratings, six are electric and four are hybrids: Rank Make & Model Powertrain Green Score MSRP Estimated Annual Fuel Cost* 1 Toyota Prius Prime SE PHEV 71 $32,975 $529 2 Lexus RZ 300e EV 67 $55,150 $651 3 Mini Cooper SE EV 67 $30,900 $747 4 Nissan Leaf EV 66 $28,140 $741 5 Toyota bZ4X EV 66 $43,070 $689 6 Toyota RAV4 Prime PHEV 64 $43,690 $741 7 Hyundai Elantra Blue Gas Hybrid 64 $26,250 $864 8 Hyundai Kona Electric EV 63 $34,050 $695 9 Toyota Camry LE Gas Hybrid 63 $28,855 $907 10 Kia EV6 EV 63 $43,975 $689 11 Toyota Corolla Gas Hybrid 62 $23,500 $944 12 Hyundai Ioniq 5 EV 62 $41,650 $737 *ACEEE analysis using EIA data of annual cost—from gasoline, electricity, or a combination—of driving 15,000 miles The ACEEE also compiled two other vehicle rankings: the so-called “Greener Choices” and the “Meanest List.” The Greener Choices list includes a variety of high-scoring conventional vehicles, and the Meanest List identifies the worst-performing mass-market models. Finishing first in the “greener” list — which the organization says is about cars “available nationwide with among the lowest environmental impacts” — is the Honda Accord Hybrid. As far as the “worst-performing mass market” vehicle, that dubious distinction goes to the $184,000 Mercedes-Benz AMG G63. “ItÂ’s important for automakers to keep expanding affordable EV options rapidly so that the benefits of EVs are available to drivers across a wider spectrum of incomes as we transition away from cars that burn gasoline,” said Peter Huether, ACEEEÂ’s senior transportation research associate and lead researcher for the GreenerCars rankings. “For drivers whose needs are not met by todayÂ’s charging infrastructure, many efficient and affordable hybrid options are available.” Just over half the cars on the 2024 Greenest List start at under $35,000, including four EVs and three gas hybrids.