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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.

2014 Mercedes SL and SLK add small expansion to Takata airbag recall

Mercedes-Benz is the latest automaker to be affected by Takata's massive airbag recall. The company has announced a voluntary recall campaign on a small number of model-year 2014 SLK- and SL-Class roadsters.
In Mercedes' case, 300 vehicles are affected, 200 of which are in the hands of customers. According to spokesperson Donna Boland, the affected roadsters were built between March and April of this year.
The issue, which is apparently the fault of one of Takata's subcontractors, rests with some improperly installed fasteners, which could keep the airbag from performing the way it's supposed to. According to Boland, Mercedes isn't sure what, if any, injuries the recalled airbags could cause, but simply claims there's an increased risk in these particular vehicles. There's been no reported instances of the faulty airbags deploying on a customer and the original issue was found in a production test.

Aston Martin tipped for F1 return with Red Bull, Mercedes

Aston Martin could be plotting a return to Formula One for the first time in over half a century. And not as a backmarker, either. That is, at least, if the latest rumors materialize. While most automakers that participate in F1 do so as either a team owner (like Ferrari and Mercedes) or as an engine supplier (think Renault or Honda), the rumored Aston Martin deal would take a different approach. According to Autosport, the proposal would have the Red Bull Racing team run Aston Martin branding – but not its engines. Those would be provided by Mercedes, just like the engines in the British marque's upcoming slate of road cars. In that regard, the deal would not be unlike the one which Red Bull currently has with the Renault-Nissan Alliance, which sees the team running Renault engines and Infiniti branding. Andy Palmer was a pivotal figure in brokering that unusual arrangement when he was working for Carlos Ghosn, and is now tipped to be brokering a similar deal in his new capacity as Aston Martin's CEO. Though Aston has found glory in sports car racing (including Le Mans and its various associated series), it was never much of a contender in grand prix racing. It competed in a handful of races in 1959 and 1960, but never achieved results worth bragging about. Aston was rumored to be plotting a return when David Richards sat as chairman of the company, having run Aston's racing program as well as Honda's F1 team previously. Those rumors, however, never materialized. Whether this time 'round gains any traction remains to be seen - Aston Martin declined to either confirm or deny the reports when reached for comment by Autoblog. Red Bull has been growing increasingly dissatisfied (and increasingly vocal about its dissatisfaction) with Renault engines over the past couple of seasons. Though the two parties won four back-to-back world titles together, things took a noticeable step backward after the new turbo engine regulations took hold for the 2014 season. Nissan/Infiniti and Red Bull are contracted to continue collaborating until the end of next season. After that is when the new Aston deal could take hold, and Mercedes is reportedly keen on the idea so that it could add another customer to its F1 engine supply business and offset the costs of development. That could effectively prove the end of Renault in F1 (at least for the time being). Aside from Red Bull, the French automaker currently supplies only that outfit's sister team Toro Rosso.