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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 spotted testing hardcore AMG GT at the 'Ring

Mercedes has showcased its new AMG GT in both base and S trims, it's rolled out the GT3 racing version and the Formula One safety car. But we're only beginning to see the extent of the variants that the German automaker is expected to spin off of its new sportscar. And here is the latest. Spied undergoing testing at the Nurburgring is what appears to be an even more performance-focused version of the Mercedes-AMG GT. It seems to be packing an upgraded aero kit – complete with front splitter and rear wing – as well as larger rolling stock. You can bet there's an even more potent version underhood of the 4.0-liter twin-turbo V8 that's already producing over 500 hp in the existing model. Whether Affalterbach deems it worthy of the Black Series label or not is another question, but what's clear is that AMG is gunning for the Porsche 911 GT3 with the performance model you see here – however disguised it may be from our prying eyes. Related Video:

The BMW 8 Series leads this month's list of discounts

Whether you prefer the sleek looks of a sport coupe, the wind-in-your-hair exhilaration of a convertible or the flexible practicality of a four-door sedan, BMW has an 8 Series to suit your fancy. And if you're in the market right now, you may find that your local BMW dealership is willing to take $18,124 off the sticker price. That figure comes courtesy of TrueCar, and it reflects the discount buyers are getting off the 8 Series' average $122,395 retail price. Most of the 8 Series models in American showrooms today are 2019 models, and that's the model year to which the discount above applies. This represents the largest discount on a new car in America this month, based on the dollar amount off the car's sticker price, and the third largest discount by percentage. And it means the average transaction price for a 2019 BMW 8 Series is hovering at $104,271. 2020 BMW 840i Gran Coupe View 38 Photos BMW offers two distinct versions of the 8 Series, the 335-horsepower 840i with rear- or all-wheel drive, and the 523-horsepower 850i, which comes standard with BMW's xDrive all-wheel-drive system. If you want to step even further up the performance ladder, there's the M8, but that 600-horsepower monster is getting a much smaller $6,150 discount. If you're not into BMWs, the 2019 Mercedes-AMG GT boasts the second largest monetary discount this month, with buyers averaging $16,713 off the Benz's $176,035 sticker price. Another Mercedes, the S-Class, is next with a $11,452 discount. After that comes a pair of Maserati sedans, the Quattroporte and Ghibli, each with discounts of around $11,000. Since the Ghibli's base price is so much lower than that of its larger sibling, that represents a much larger 13.5% cut from its average retail price of $81,384 for an out-the-door cost of $70,373. For a look at the best new car deals in America based on the percentage discount off their suggested asking prices, check out our monthly recap here. And when you're ready to buy, click here for the Autoblog Smart Buy program, which brings you a hassle-free buying experience with over 9,000 Certified Dealers nationwide. Related Video: