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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 was set to sell version of Nissan Titan, now Infiniti might instead

Mercedes-Benz Titan. Mercedes-Benz Frontier. Mercedes-Benz pickup truck. None of these things roll off the tongue particularly well. We'd like to think that's the reason Daimler opted to kill the idea of rebadged Titan and Frontier pickups from corporate ally Nissan. In reality, the execution before the Frankfurt Motor Show was due to more complicated issues.
Yes, Mercedes, byword for German luxury, style and quality, would have slapped a three-pointed star on a pair of Japanese pickup trucks that have failed to resonate with consumers in the world's largest truck market. That slapping of badges isn't much of an exaggeration, at least on the outside. According to the report from Road & Track, the truck's front clip would have been tweaked, but beyond that, the sheetmetal would have been unchanged. The interior would have received a more thorough going-over by the team at Mercedes, while the suspension and noise, vibration and harshness tuning would have also received significant attention.
The trucks would have ended up being sold through the light-commercial branch of Mercedes-Benz - the same folks that will happily sell you a Sprinter van - had the deal gone through. Issues arose, though, first with the engines. Mercedes wanted a wider range of powertrains to allow it to tune models for specific markets, while Nissan said it couldn't engineer the wide variety of engines that MB wanted to drop under the hood. For the smaller truck, meanwhile, MB was interested in a hybrid or plug-in variant, according to R&T, although this was also shot down by Nissan.

Sunday Drive: Volvo hits a crossover home run, and people still love sports cars

Looking back at the week that just was clearly tells us at least three things. First, crossovers don't have to be boring. Second, people still love sports cars, from the attainable (Audi TT RS) to the fanciful (Mercedes-AMG GT C). And finally, the traditional German trio of premium luxury brands had better not rest on their laurels, because credible challengers are coming in from every direction. The biggest reveal of the week, at least judging by the interest of Autoblog readers, was the Volvo XC40. Not only is the little 'ute a looker, it introduces some innovative new buying/leasing schemes designed to appeal to an audience accustomed to trading in and trading up every couple of years. Think of Volvo's flat-fee lease as you would a smartphone contract, and you'll be on the right track. Genesis looks to have a hit on its hands in the form of the G70 sport sedan. We took a Korean-spec model for a spin and found a lot to like about the upstart contender. We can't wait to sample one here in the United States to see how it stacks up against the Audi A4, BMW 3 Series, and Mercedes-Benz C-Class. In other news, we're still really excited to see a production Ford Ranger Raptor. But if you just can't wait for the official reveal — it's OK, neither can we — take a look at the renderings in our post down below. As always, tune in to Autoblog next week for a front-row seat to all the happenings worth following in the automotive industry. Volvo XC40 revealed | Crossover at the crossroads of style and substance 3 ways the Volvo XC40 is a game-changer Genesis G70 First Drive | An arrow to the heart of the Germans 2018 Audi TT RS Drivers' Notes | Five pots of turbocharged honey 2018 Mercedes-AMG GT C Quick Spin | This is the AMG GT you want The Ford Ranger Raptor is real, and this is what it might look like