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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.

Hybrids to slowly replace diesels at Mercedes

German automakers have had some success bringing diesel-powered vehicles in America in recent years, but that may not last much longer. A product planner from Mercedes-Benz we spoke to in Austria apparently believes hybrid setups may be more favorable in the long run, and electrified hybrids will eventually replace oil burners. That's why most every concept car we've seen in the last few years features some sort of hybrid or plug-in hybrid setup while there have been very few diesels. "Yes, diesel is technically complex, and very expensive. The additives to reduce particulate matter are very costly. You'll see more hybrids to meet the changing regulations," according to our source. We've seen this exact scenario play out with Mazda, which has struggled to bring its 2.2-liter diesel engine to America, citing the costly process to reduce emissions in order to meet California-level standards while still maintaining suitable performance for the US market. It's certainly interesting that this news comes hot on the heels of revelations that VW, the automaker that offers the most diesel-powered models in the US, was found in violation of emissions rules on its popular 2.0-liter TDI engine. New Mercedes GLE Will Have An Active Chassis Mercedes has launched an all-out product offensive in the last two years, but the product planning think tanks in Stuttgart have a few surprises in store, too. While Benz has just launched its new GLE SUV family, GLE product planners are already hard at work on the next-generation – yes, a good 5-6 years away – and tell us it will evolve to boast new chassis technology, "something that doesn't exist today." The next-GLE is codenamed 167 – the previous ML (now replaced by the GLE) was internally referred to as 166 – and the GLE planner we recently talked to calls the platform an "active chassis." He further alluded that the next version could be electrified. Currently, the only aspect of the GLE's chassis that is 'active' today are the hydraulic pumps on the roll bars, he said. Many of Mercedes' models can already be had with an adaptive air suspension, multiple selectable driving modes, and other features that were rare or nonexistent just a couple generations ago. One More Compact Crossover On The Way The planner said we can also at least one more all-new, forthcoming compact crossover to be built on the GLA platform. In addition to the GLA, that architecture is currently shared by the A-Class, B-Class, and CLA-Class models.

Mercedes previews GLC crossover coupe concept for Shanghai

Say what you will about slant-backed crossover coupes: if the industry has learned anything from BMW and its X6, it's that they're popular... and profitable. Little wonder, then, that Mercedes followed suit with the release of the GLE Coupe. And now it appears set to follow the lead set by the BMW X4 as well with a smaller GLC Coupe... at least, that is, in concept form. Previewed in this latest teaser rendering is the Concept GLC Coupe, a design study which Mercedes is set to present at the Shanghai Motor Show later this month. The statement that accompanies it (which you can read below) doesn't tell us much, except to say that it is "near-production-standard" – which is to say that it stands a strong chance of reaching showrooms. As it is, the GLC with a conventional roofline is set to take the place of the GLK in Benz's expanding crossover lineup. The emergence of this concept ought to preview that new model's styling, regardless of how steeply its roofline tapers off towards the back. The Shanghai show is, incidentally, the same venue Mercedes originally floated the idea of its smallest crossover with the presentation of the Concept GLA two years ago. And as we all know, that subsequently entered production – in a form closely following that of the concept. So we wouldn't be surprised to see a GLC Coupe emerge in close proximity to its more conventional counterpart (maybe even before), heavily influenced by the show car we'll see later this month. Related Video: