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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 fits new C-Class with AMG kit

It's only been a week and a half since Mercedes-Benz revealed the new C-Class, and it'll likely be a while yet before the replacement for the C63 AMG comes along. But if you want to see a preview of what it'll look like, look no further than the AMG aero kit that has just surfaced.
Expected to debut on the new C-Class at the fast-approaching Detroit Auto Show, the AMG Line Exterior Pack adds a new bumpers front and rear, side skirts, dual exhaust tips, mesh grille, aluminum window frames and - most importantly - 18-inch alloys packing upgraded brakes and fitted to a lowered sport suspension. All of which will help any C-Class look the part, even if the engine remains stock.

This or That: Mercedes S-Class 350SD vs. 2003 Jaguar XJR [w/poll]

Budget. It's a wretched word, whether you're going out to eat, shipping for a new outfit or, more relevant to today's discussion, buying a car. Massive marketing machines have convinced us, as a population, to buy the best you can afford, repercussions be damned – If you've saved up some money, spend it! All of it, on whatever it is that currently sits atop your personal Amazon wishlist, be it a Timex that takes a lickin' and keeps on tickin', a $17,000 Gold Apple Watch or a $60,000 Rolex Cosmograph Daytona. But what if the best you can afford is... say, $12,815? For that price, you can buy a brand-new 2015 Nissan Versa (including destination), assuming you're happy with zero options and a manual transmission. For that price, you'll get standard air conditioning, a CD player and... well, a warranty. Pretty sensible choice, Captain Frugal. But also ridiculously uninspired. And so that brings us to today's edition of This or That, in which two Autoblog editors pick differing sides of an argument and duke it out to see which one of us can convince you, dear reader, is better. Or at least less wrong. You be the judge. As a refresher, I'm two-and-two on these challenges, having lost the first and second editions before storming back in rounds three and four. Today, as alluded to above, we decided to throw our collective brainpower (oh lord, what have we done?) at what may be the single most difficult question currently confounding the best minds our planet has to offer: What is the best used used luxury car you can buy for the price of a 2015 Nissan Versa? Shall we meet our contenders? Allow me to introduce you to the most perfect luxury car money can buy (assuming the amount of money you're holding is equal to the amount of the cheapest new car currently sold in America, the Nissan Versa). My pick is the 1991 Mercedes-Benz S-Class. Not just any S-Class, but the legendary W126, which was produced between 1979 and 1992. And not just any W126, either, but one powered by a 3.5-liter turbodiesel engine. And with that, I send the argument to my esteemed colleague, Associate Editor Chris Bruce. Bruce: Jeremy, we had over $12,000 to budget for this challenge, and the best you can manage is a 24-year-old diesel Mercedes? I love oil-burners as much as any other auto writer with their mountains of torque and huge cruising range, but you're making this too easy on me. Also, you're really choosing a brown, diesel, German luxury sedan?