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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 Alabama ops ordered to allow workers to discuss unionization

A decision last week by the National Labor Relations Board has bolstered the efforts of the United Auto Workers at Mercedes-Benz's Tuscaloosa, AL factory, as the union continues its attempts to represent the factory's workers. According to Reuters, the NLRB ruled that Mercedes-Benz US International, the proper name of the company behind the Tuscaloosa factory, can no longer prevent workers from discussing unionization in work areas while off the clock. While MBUSI maintains that it's not taking a side on unionization and that it wants the "the decision left to our team members," the UAW is still arguing that the US facility should take the same position on unions that the rest the world's Mercedes-Benz plants take and. Speaking to Reuters, the UAW says that stance "acknowledges the human right to form trade unions" and "respects the right of collective bargaining." According to Reuters, the Alabama factory employs 3,500 workers – 2,500 full time and 1,000 "temporary" – and is the only Daimler-owned factory on the planet not to offer employees the opportunity for representation. Presently, the Tuscaloosa facility assembles Mercedes' C-Class, GL-Class and M-Class vehicles.

Mercedes-Maybach Pullman stretches its way to Geneva

Mercedes-Benz is known the world over for producing luxury automobiles, but even among Benzes there's a hierarchy. The S-Class sits at the top of the Mercedes range, the Maybach at the top of the S-Class, and what you see here sits at the top of the Maybach line. It's the new Pullman limousine, and it arrives on the 50th anniversary of the original. Stretching a massive 21.3 feet, the new Mercedes-Maybach Pullman is even longer than the previous Maybach 62 by a full foot, and a good 3.5 feet longer than the standard-wheelbase Mercedes-Maybach S-Class, or two feet longer than the G63 AMG 6x6. In other terms, it's over a foot longer than the Rolls-Royce Phantom EWB, and the better part of a yard longer than even the Cadillac Escalade ESV. Heck, you could just about fit Benz's other flagship, the Mercedes-AMG GT, inside the new Pullman's 14.5-foot wheelbase. As if that's not enough, it also stands 3.9 inches higher than a standard S-Class to the benefit of its imposing presence and interior space. Should you be so fortunate as to be graced with an invitation to step inside, you'd find an interior entirely clad in leather with four seats: two recliners and two fold-down seats facing backwards. Those principal rear seats can recline between 19 and 43.5 degrees and offer an extensive array of individual adjustments to cater just-so to the occupants' individual preferences. Ingress and egress are enabled by larger rear doors that open in front of – instead of next to – those rear seats to enhance the privacy of the traveling dignitaries, who will be able to monitor the state of affairs through the analog thermometer, speedometer and clock mounted in the roof liner. They'll also enjoy privacy thanks to the electrically operated glass partition wall with an 18.5-inch monitor mounted in front of it and a choice of Burmester sound systems. Long the favorite of heads of state and captains of industry, the new Pullman will be unveiled at the Geneva Motor Show now just weeks away. We don't doubt that Mercedes will offer its customers a choice of engine options (as long as they're capable of motivating the new Pullman's assuredly substantial heft), but most suitable to the task will of course be the 6.0-liter twin-turbo V12 with its 523 horsepower and 612 pound-feet of torque.