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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.

Project Maybach is an absurd, awesome off-road electric coupe

Mercedes has created some mighty unusual concepts for the Maybach luxury brand. The Exelero high-speed test car and the Ultimate Luxury SUV sedan come to mind. But the Project Maybach, designed in collaboration with late fashion designer Virgil Abloh, may be the wildest yet, being an electric off-road coupe. It's not just the fact it's a two-door off-road coupe. It's the fact that it's a nearly 20-foot-long two-door off-road coupe. And it has very traditional proportions and lines, with a gargantuan front end, and a somewhat less gargantuan rear end. It's squared-off, but in a more elegant, midcentury luxury car way than say, a Hummer. And of course, it has a huge chrome grille and highly embellished taillights, complete with Maybach logos. And yet, this old-school coupe sits high off the ground. It rolls on small, steel-style wheels with chunky tires. It even has skid plates, bolt-on fender flares, rock rails and a roll cage with a roof basket. It's all painted in a matte tan paint that makes it look like a desert-ready expedition vehicle. It's even arguably practical for expedition work. The somewhat spartan-looking interior has tan leather seats that recline fully flat for sleeping. Being an electric car with long areas unoccupied by people, plus that roof basket, it likely has loads of cargo space. On the hood are solar panels that might provide a bit of range, but would at least be handy for recouping some power for accessories. The interior seems to have additional storage bins and tools stowed in special compartments around the cabin. As for the actual performance and range, well, Mercedes has nothing specific. That's not entirely surprising, since this seems to be solely a design exercise. As such, don't expect to see a production model anytime soon. Then again, off-road luxury vehicles are certainly popular. Maybe Mercedes would consider it if there were enough seriously wealthy customers expressing interest. Related video:

Time to catch up with Jay Leno's Garage, including his Lamborghini Espada restoration

If you're already jealous of the time, effort and money that Jay Leno can devote to his massive car collection, prepare to get a little greener with envy with this latest video from Jay Leno's Garage. Instead of the usual format of discussing a model for about ten minutes and then taking it out for a test drive, this week Leno gives viewers on a tour of over a dozen projects concurrently happening in his stable. The breadth of the vehicles shown and the things being done to them run the entire span of the automotive hobby. At the same time, Jay's shop is working on just a simple restoration of his 1969 Lamborghini Espada (pictured), and at the other side of the building, the team is rebuilding a wood-bodied 1914 Detroit Electric from scratch. He eventually plans to slot a more modern electric drivetrain into it. If bikes are more your interest, there's a freshly completed Brough Superior just waiting for a ride, and if American models are your thing, a Ford Bronco is getting a Coyote V8 installed into it. You have some very specific tastes if you can't watch this clip and start wishing at least one of these vehicles could be in your own garage. Other than the personal projects his mechanics are working on in the shop, Jay gets to have them all, plus plenty more.