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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.

Mercedes CLA45 AMG Racing is ready for a spot on the grid

Mercedes-Benz trotted out its CLA45 AMG-based racer at the 2013 Frankfurt Motor Show. We first showed you the sedan in the deluge of news and reveals that precedes most good auto shows, and were blown away by the car, formally known as the CLA45 AMG Racing Series.
We were strolling by the Mercedes stand, and figured we'd pop in and take a look at the new racer and its carbon-fiber body panels, gutted interior, and race-sourced aero parts. It's a looker, both as a road car and a track weapon. It's not clear what series the CLA45 AMG will qualify for, although it does seem like a shoe-in for the World Touring Car Championship. Let us know what you think of the CLA racer down in the comments. In the meantime, we've got a full gallery of live images up top, along with the stock images that were posted last week on the Mercedes-Benz Facebook page.

Autoblog Minute: New car customer satisfaction down according to latest ACSI report

Customers have spoken and automobile satisfaction is down in 2015. Autoblog's Chris McGraw reports on this edition of Autoblog Minute. Show full video transcript text [00:00:00] Customers have spoken and automobile satisfaction is down in 2015. I'm Chris McGraw and this is your Autoblog Minute. The American Customer Satisfaction Index or ACSI released its updated numbers and according to the survey, new car buyer satisfaction is down for the third straight year. According to an ACSI press release, customer satisfaction with new automobiles has fallen 3.7 percent, to 79 on its 100-point scale. The ACSI report is based on over 4,100 customer surveys collected in the second quarter of 2015 Sitting at the top of the industry in customer satisfaction is Toyota's Lexus brand with a score of 84. Which was good enough to dethrone Mercedes-Benz, which fell 3% to a score of 83. Of the Big Three, Ford was the only domestic automaker to maintain overall customer satisfaction with its score of 81. General Motors slipped 3% to 79 and Fiat Chrysler had a 5% drop, registering a score of 75 out the possible 100. What's driving this trend of customer dissatisfaction? ASCI points to the rise in recalls and car prices. Where do you land on customer satisfaction spectrum? Sound off in the comments with your thoughts on the current state of car ownership and brand quality. For Autoblog, I'm Chris McGraw. Autoblog Minute is a short-form video news series reporting on all things automotive. Each segment offers a quick and clear picture of what's happening in the automotive industry from the perspective of Autoblog's expert editorial staff, auto executives, and industry professionals. Chrysler Fiat Ford GM Lexus Mercedes-Benz Car Buying Ownership Autoblog Minute Videos Original Video