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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.

BMW can't build enough M3 wagons, but the U.S. won't see any

Why, oh why, won’t the automobile companies that supposedly cater to Americans give us a viable touring wagon? Seems that BMW is one manufacturer thatÂ’s aware of the question, but skirts the answer. WhatÂ’s more frustrating is that the German company, and others, have for years been off-handedly tossing out the same refrain: “Maybe weÂ’ll bring a wagon back to the U.S.” Not. All the more irritating then is the news that the Bavarians have increased production in Munich of its M3 Touring longroof version to keep up with demand. The information comes via Bimmer Today, which spoke with BMW M CEO Frank van Meel. He said that the company was surprised by the amount of interest in the M3 Touring since its debut during last year's Goodwood Festival of Speed. In fact, he said, the company had to facilitate a production ramp-up within its Munich facility. Despite that increased production, the backlog of orders means that customers are still on wait lists, he said. Last year, van Peel admitted that demand for M-wagons in the U.S. has been steadily increasing, and exporting a touring example was a concept BMW was "taking into consideration.” Crossovers certainly are this decadeÂ’s version of the wagon, which leaves American enthusiasts will few choices: only expensive versions from Audi, Volvo and Mercedes-Benz and a couple of others. Details that were announced last year — a few months before the wagon went into production for sale in Europe, the U.K. and elsewhere — noted that the M3 Touring was only available in Competition spec with xDrive all-wheel drive and a 3.0-liter twin-turbo inline-six with 503 horsepower and 479 pound-feet of torque. Pricing started at GBP80,550 ($105,000 U.S.) More data on the M3Â’s intro here. Related video:

Xcar drives the Mercedes-AMG C63 S

The transition among Europe's high performance vehicles from naturally aspirated power towards turbocharging has taken time but has shown constant progress. The march seemingly started with hot hatches when models like the Volkswagen GTI quit adding displacement and finally succumbed to forced induction. Now, the change has affected the higher rungs with the latest BMW M3 and possibly even all future Porsche 911s. Of course, the question arises does this shift really matter to the driving experience? Xcar Films aims to find while taking a spirited ride in the new Mercedes-AMG C63 S. One thing is for sure; the switch from the 6.2-liter V8 in favor of the new 4.0-liter twin-turbo doesn't seem to be hurting the Merc's sound. Even with forced induction, the exhaust still emits a very angry grumble. Find out from Xcar if the rest of the new engine's attributes stack up quite so well, though. Related Video: