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Mercedes-AMG GT attacks Circuit of the Americas

Mercedes-Benz is having a banner year with its Formula One team. Through 2014, the constructor has 454 championship points; ahead of its nearest competitor (Red Bull-Renault) by a margin of 182 tally marks. We're sure they can almost taste the champagne.
It's fitting then, and a little big cocky in a good way, that Mercedes has released a video of its newest sports car at an F1 venue. In this case, the car is the lovely Mercedes-AMG GT S, and the racetrack is Austin's Circuit of the Americas.
Having seen the official photo set and scratched the surface of the technical specifications earlier this week, we're excited to finally hear the thing run. As you might guess, the deployment of 503 horsepower and 479 pound-feet of torque from the twin-turbo V8 is a motivating experience. Crank up your volume, and hit that play button. (Oh, and Mercedes shot the thing in 4K, too, so those of you with expensive televisions/monitors should take heed to the settings.)

Mercedes-Benz engines with 48-volt systems coming in 2017

As part of a big green push announced yesterday, Mercedes-Benz is jumping into the world of 48-volt power. The company will launch a new family of efficient gasoline engines next year and will begin rolling out 48-volt systems with it, likely in its more expensive cars first. Mercedes will use the 48-volt systems to power mild-hybrid functions like energy recuperation (commonly called brake regeneration), engine stop-start, electric boost, and even moving a car from a stop on electric power alone. These features will be enabled through either an integrated starter-generator (Mercedes abbreviates it ISG) or a belt-driven generator (RSG). (RSG is from the German word for belt-driven generator, Riemenstartergeneratoren. That's your language lesson for the day.) Mercedes didn't offer many other details on the new family of engines. There are 48-volt systems already in production; Audi's three-compressor SQ7 engine uses an electric supercharger run by a 48-volt system, and there's a new SQ5 diesel on the horizon that will use a similar setup with the medium-voltage system. Electric superchargers require a lot of juice, which can be fed by either a supercapacitor or batteries in a 48-volt system. Why 48-volt Matters: Current hybrid and battery-electric vehicles make use of very high voltages in their batteries, motors, and the wiring that connects them, usually around 200 to 600 volts. The high voltage gives them enough power to move a big vehicle, but it also creates safety issues. The way to mitigate those safety issues is with added equipment, and that increases both cost and weight. You can see where this is going. By switching to a 48-volt system, the high-voltage issues go away and the electrical architecture benefits from four times the voltage of a normal vehicle system and uses the same current, providing four times the power. The electrical architecture will cost more than a 12-volt system but less than the complex and more dangerous systems in current electrified vehicles. The added cost makes sense now because automakers are running out of ways to wisely spend money for efficiency gains. Cars can retain a cheaper 12-volt battery for lower-power accessories and run the high-draw systems on the 48-volt circuit. The industry is moving toward 48-volt power, with the SAE working on a standard for the systems and Delphi claiming a 10-percent increase in fuel economy for cars that make the switch.

Ultra-rare Maybach 57S Coupe ordered new by Moammar Gadhafi is for sale

One of Maybach's rarest 21st-century cars is for sale in Holland, and it owes its existence to one of the most controversial African leaders in recent history. Dutch exotic car dealer Auto Leitner listed a Xenatec-built Maybach 57S Cruisero coupe ordered and customized by Colonel Moammar Gadhafi but built after his death. Short-lived German coachbuilder Xenatec chose to start with the short-wheelbase 57 rather than with the longer and more stately 62. It didn't alter the sedan's length or wheelbase; instead, it created the Cruisero by extending the front doors, removing the rear doors, and adding more rake to the roof pillars. Several other minor visual tweaks set the coupe apart from the sedan, and the interior was given a more superficial makeover. Xenatec made no mechanical modifications, so power comes from an AMG-built 6.0-liter V12 twin-turbocharged to 604 horsepower and 738 pound-feet of torque. It spins the rear wheels via a five-speed automatic transmission. Although the coupe weighs 6,000 pounds, it takes five seconds to reach 60 miles per hour from a stop. The 57S Coupe was not a hefeweizen-fueled hack job haphazardly welded together in a shed. It was authorized by Daimler, and it was engineered to the same standards as the regular-production car. Executives were confident that they could sell 100 units to politicians, entrepreneurs, oligarchs, and other wealthy people around the world, but Xenatec filed for bankruptcy and closed after making only eight when one its main investors, a Saudi Arabia-based company named Auto Kingdom, abruptly stopped funneling money into the project. Gadhafi configured Auto Leitner's 57S Coupe, which was the fourth one built, and he should have taken delivery of it in 2012, but the Libyan Civil War that erupted in 2011 and ultimately led to his death on October 20 of that year derailed those plans. It was instead sold to another buyer whose identity is unknown. What's certain is that the person who ended up with Gadhafi's Maybach rarely drove it: its odometer shows about 1,429 miles. Highly optioned, this 57S is equipped with 20-inch wheels, soft-close doors, heated and massaging individual rear seats separated by a fridge, rear tray tables, front and rear air conditioning systems, a rear-seat entertainment system, and, for good measure a fire extinguisher.