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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.

2016 Mercedes-Benz GLC250 First Drive [w/video]

There's nothing wrong with the Mercedes-Benz GLK other than old age, having first sold here in 2009. But with creased, off-road themed styling, a naturally aspirated V6, and a smallish interior, it's out of step with the company's growing line of sport utility vehicles. Even its name is a harsh-sounding outlier. Enter the 2016 GLC. Mercedes calls this model the second generation of the GLK, but it's closer to a total reboot. The new look follows the smooth design of contemporary Benzes. The spotlight engine is now a spunky turbocharged four cylinder, and yes, the GLC is bigger inside and out. As for the name change, that's part of the latest badge realignment, and the "C" indicates the GLC's position as the crossover counterpart to the C-Class sedan. Now firmly integrated into the Mercedes SUV family, the GLC takes a seat at the table between the entry-level GLA and the larger GLE. The GLC's fresh appearance has all of the tenets of modern Mercedes design. We've come to the Alsace region of France to sample this familiar yet evolved utility vehicle. Driving along route A35, we're immediately struck by the turbo four-cylinder's prowess. It's strong from launches when we mash the gas, returns a subtle but pleasing exhaust note, and it's more than capable of picking off slower moving traffic as we dash through the French countryside. We're driving the European-spec GLC250 model, which has the same 2.0-liter engine Americans will get in the GLC300, though the Euro model has 30 fewer horsepower. The US version will be rated at 241 hp and 273 pound feet of torque, the same output as the C300 sedan. The turbo has big shoes to fill, as it gives up 61 hp to the 302-hp V6 used in the GLK. Mercedes is banking consumers won't miss this raw power, as the GLC's inline-four offers the same amount of torque as the GLK's V6, but much sooner in the rev band. Even in its detuned European state, the I4 demonstrates the kind of urgency that Americans prefer for their grocery-getting people haulers. It's paired with a nine-speed automatic transmission, upgraded from the GLK's seven-speed. There are paddle shifters, though most Americans won't have reason to use them. Sometimes we grab them and lay on the throttle just for fun, and the GLC responds with bursts of speed. Even in its detuned European state, the I4 demonstrates the kind of urgency that Americans prefer for their grocery-getting people haulers.

Mercedes-Benz C-Class scores well in TUV lifecycle analysis

Mercedes-Benz drivers and treehuggers don't always go hand in hand, but, like a lot of other companies, the German automaker is looking to boost its green cred. This time, it's all about the car's lifecycle carbon footprint. The Daimler AG unit is using its new C-Class sedan as an example of how it's making progress in that department. Mercedes-Benz, citing the inspection authority TUV Sud, says the 2015 C-Class has a 10-percent lower lifecycle carbon footprint than its 2014 predecessor, based on driving about 125,000 miles over the life of the car. About 95 percent of the car (by weight) is recyclable, slightly higher than the average for most vehicles, and the model has upped its amount of recyclable materials up by 23 percent and increased its use of "natural materials" by 55 percent. Better aerodynamics also helps things out on the fuel-economy front, Benz says. Taking a longer view, the 2015 C-Class's carbon footprint is 28 percent better than the 2007 version that launched the vehicle line. The 2015 C-Class hasn't received a fuel-economy rating from the US Environmental Protection Agency, which tagged the 2014 C350 with a combined fuel-efficiency rating of 24 miles per gallon from its 3.5-liter 6-cylinder engine. Check out Mercedes-Benz's press release below and find the Autoblog First Drive impressions here. TUV Environmental Certificate: The new C-Class makes its mark with an exemplary life cycle assessment Stuttgart, Mar 28, 2014 The C-Class sets efficiency benchmarks for its class, helped by an intelligent lightweight concept, excellent aerodynamics and new, frugal engines. The neutral inspectors from the TUV Sud technical inspection authority have confirmed the high level of environmental compatibility of the new Mercedes-Benz C-Class. Besides a sensuous, clean-cut design, a top-class interior and a host of technical innovations, the premium saloon also boasts an exemplary life cycle assessment, which is why it has been awarded the Environmental Certificate in accordance with the ISO 14062 standard. Professor Dr. Herbert Kohler, Chief Environmental Officer at Daimler AG: "Our engineers have pulled out all the stops in an effort to lower fuel consumption while at the same time further accentuating the car's sporty character. By employing an intelligent lightweight design with a high proportion of aluminium, for example, it has been possible to make the new C-Class up to 100 kilograms lighter than its predecessor.