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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.

Our interview with Jeremy Clarkson and James May, plus SEMA! | Autoblog Podcast #491

This week, David Gluckman and Mike Austin talk SEMA madness, mis-aligned steering wheels, wireless charging, McLarens (they're sports cars!), and decals. We also have an excerpt from a recent interview with James May and Jeremy Clarkson of The Grand Tour and Top Gear fame. As always, we talk about a variety of cars we've been driving and then respond to some questions from listeners. And as a bonus, there's a trivia question mixed in. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want questionable buying advice of your very own, send a message or a voice memo to podcast at autoblog dot com. Oh, and please send trivia questions! You'll get the honor of stumping your fellow listeners, and we'll thank you too. Autoblog Podcast #491 The video meant to be presented here is no longer available. Sorry for the inconvenience. Topics and stories we mention Stars Selling Cars The Ford Flex is dying SEMA! Dodge Durango Shaker concept New Mercedes inline-six engines Our interview with Jeremy Clarkson and James May Mercedes-Benz E-Class McLaren 570S Ad of the Week: Volvo ABCs of Death Spend My Money on used cars Rundown Intro - 00:00 The news - 02:15 Clarkson/May interview excerpt - 17:12 What we've been driving - 21:12 Ad of the Week - 39:02 Spend My Money/listener questions - 44:13 Total Duration: 57:05 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Feedback Email – Podcast at Autoblog dot com Review the show in iTunes Celebrities Podcasts SEMA Show Cadillac Dodge Ford McLaren Mercedes-Benz Volvo ford flex the grand tour mclaren 570s SEMA 2016

Mercedes-AMG Hulks out again with new G63 test

The last time we saw Mercedes-Benz testing its camouflaged, lime-green G63 AMG, it was on the sunny roads of Germany. Perhaps recognizing that this was a tragic waste of its talents, Mercedes has now moved testing of its new brute to the windy, snowy tarmac of Sweden. Besides being a far more suitable environment for its monstrous G-Wagen, Mercedes' arrival in Scandinavia gives us yet another look at its 6x6-inspired updates. Judging by the license plates, this is the exact same vehicle we spotted way back in November, which gave us our original look at the impending arrival of the G's hoisted-up ride height, more aggressively flared fenders and meatier off-road-ready tires. As with our previous report, our spies are still arguing that the next G63 will be fitted with Mercedes' 5.5-liter, twin-turbocharged V8. That means as much as 544 horsepower and 560 pound-feet of torque will be on tap, and it'll all be dispatched via a seven-speed automatic transmission. The next G-Wagen is still on pace for a debut this year, although we still aren't sure where. Forced to put money on it, we'd bet on a European show, likely March's Genevan extravaganza or September's Frankfurt show.