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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.

Lewis Hamilton owns 15 cars, uses tow trucks to keep the mileage low

No matter how you feel about Lewis Hamilton off the track, it's impossible not to respect his talent behind the wheel. Currently, Hamilton is the second most successful Formula One driver of all time. His 67 wins and four championships place him only behind Michael Schumacher's 91 wins and seven championships. With all those winnings, Hamilton has racked up a decent personal fortune, much of which he uses to buy cars. Except he doesn't drive them quite as much as you might think. According to The Sunday Times, Hamilton's net worth of just over $207 million makes him one of the richest sports figures in the UK, just behind David Beckham. In a recent interview with the British newspaper, Hamilton gave some details on his personal car collection. His first car was a used Mini Cooper, soon followed by a Mercedes-Benz C200. Both have long since been replaced by a pair of original Shelby Cobras, a 1967 Shelby GT500, a Ferrari 599 SA Aperta, two LaFerraris (a red coupe and a white Aperta), a McLaren P1 and a Pagani Zonda 760 equipped with a manual transmission. All in, Hamilton has about 15 cars split between homes in Monaco and Los Angeles. Unsurprisingly, he has a Mercedes-AMG Project One ( a car that shares more than a little with his F1 W09 EQ Power+ race car) on the way. Hamilton has some hot takes on his personal collection. "The Zonda is terrible to drive," he said. "It's the best-sounding car I own, but handling-wise it's the worst. I got it in manual because I didn't like the tiptronic version. The tiptronic Pagani offered was worse than the Smart Roadster I had." He also says his Shelby Mustang is a "beautiful car, but a heap of junk." In order to keep the miles down (and valuations up), Hamilton apparently has a tow truck on retainer in Los Angeles. When he's finished driving one of his Ferraris, he'll have the car towed back to his place. Classic cars are becoming a solid and serious investment, and Hamilton doesn't want to squander his wealth like some other athletes. That said, there are a couple more cars Hamilton would love to own, including a Mercedes-Benz 300 SL (the one with the gullwing doors) and a Ferrari 250GT California Spyder (the one from "Ferris Bueller's Day Off"). Related Video:

Mercedes-Benz S-Class Cabriolet completes the luxury trinity

In its continuing bid to simply eat the lunch of the Bentley Continental GT, Mercedes-Benz has followed up on the S-Class sedan and coupe with a new S-Class Cabriolet. Aristocrats, take notice. Below the beltline, all is familiar. That means the same stylish sheetmetal, from the chiseled front fascia to the strong character lines to the pert rear end. Expect the cabin's accommodations to mirror the hardtop model. But the third member of the S-Class family differs above the beltline, where we see a sumptuous canvas roof. The three-layered top is, unsurprisingly, quite advanced. It uses a three-layer, acoustically optimized design that promises a quiet ride. The top can be dropped or raised in under 20 seconds and at speeds of 37 miles per hour. Finally, the addition of a canvas cover doesn't do much to the S-Class' aerodynamics, as the cabriolet still returns an impressive 0.29, which compares favorably with the 0.27 of the four-door model (the coupe's CoD isn't available). Opting for the S-Class Cabriolet will entitle you to some additional standard equipment, including Mercedes' AirScarf neck heater. The droptop will also pioneer the German brand's new Thermotronic climate feature, which takes complete control of the HVAC system and makes adjustments based on the findings of 12 sensors and 18 actuators. The sensors include those for interior and exterior temperature, solar radiation, air quality, and dew point, among others. Yes, your S-Class will have a sensor for the dewpoint. Also new to the S-Class Cabriolet – not to mention the S-Class line as a whole – is a 9G-Tronic nine-speed automatic transmission, which is already featured on the SLK-Class and the new GLC-Class. The new 9AT will be limited to the S550, while the new S63 Cabriolet will use the coupe's seven-speed AMG Speedshift transmission. Both engines, meanwhile, mirror their coupe counterparts, with 449 horsepower and 516 pound-feet of torque for the S550 and 577 hp and 664 lb-ft of torque on the AMG model, allowing the latter to hit 60 mph in just 3.9 seconds and reach a limited top speed of 186 mph. Both the S550 cabriolet and its Mercedes-AMG counterpart will make their global debut at the 2015 Frankfurt Motor Show, later this month. Read on for the full press release from Mercedes-Benz. The new Mercedes-Benz S-Class Cabriolet Open-top luxury Stuttgart. The new S-Class Cabriolet is the fourth variant of the current S-Class family in the U.S.