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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.

Best luxury SUVs of 2022 and 2023

Once upon a time, the idea of a luxury SUV meant a Range Rover, and even that was pretty agricultural by modern standards. Then Jeep Grand Cherokees and Ford Explorers started offering fancy, range-topping versions followed soon by Lexus, BMW and Mercedes dipping their toes in the water. And then the floodgates opened. Today, there is a staggering number of luxury SUVs available in every shape, size and price point. There are electric luxury SUVs like the Tesla Model X and Jaguar I-Pace, as well as gas-swilling, high-performance SUVs like the BMW X5 M and Cadillac Escalade V. Sports car makers Porsche, Aston Martin and Lamborghini have even dived in.  But of this great many, which are the best luxury SUVs? We sat down, scoured our reviews, took some votes, had some discussions and came up with the luxury SUVs we view as the best. They are listed alphabetically within the six segments listed below.  Best Subcompact Luxury SUV   |   Best Compact Luxury SUV   |   Best Midsize Luxury SUV (Two-Row) Best Midsize Luxury SUV (Three-Row)   |   Best Flagship Luxury SUV (Two-Row)   |   Best Flagship Luxury SUV (Three-Row)  Best subcompact luxury SUVs Mercedes-Benz GLB-Class Why it stands out: Outstanding space and versatility; legit luxury interior; amusing GLB 35 versionCould be better: Overwhelming and confusing tech interface Most subcompact luxury SUVs are a dubious value, with cramped interiors of marginal quality and unrefined driving dynamics. You'd be much better off paying less money for a loaded, non-luxury compact SUV. The Mercedes GLB is different, though. Its boxy design provides space few other subcompact SUV can match (luxury or otherwise), while its cabin design and feature content are in keeping with pricier Mercedes models. The quality's not exactly up to GLC standards, nor is driving refinement, but the difference is appropriate for how much you're saving and still perfectly acceptable. There's nothing dubious about buying a GLB.     Volvo XC40 Why it stands out: More features for the money; spacious and versatile interior; distinctive design; electric versionCould be better: Fuel-efficient base engine only available with FWD Most subcompact luxury models feel a bit like cheap knockoffs of their bigger, pricier brand mates. The XC40, by contrast, is a break from the Volvo norm in a good way.

Autoblog Minute: Frankfurt Motor Show recap

We check in with Autoblog staffers in Germany for a recap of the biggest reveals from the 2015 Frankfurt Motor Show. Autoblog's Adam Morath reports on this edition of Autoblog Minute with commentary from senior editor, Greg Migliore. Show full video transcript text [00:00:00] As the doors of the Frankfurt Motor Show open to the world's press we venture across the Atlantic for a front row seat to all the action. I'm Adam Morath and this is your Autoblog Minute. The fall auto show season kicks off this week and Germany is set to play host. We're expecting plenty of big vehicle reveals and industry news to come out of Frankfurt. [00:00:30] [Greg Migliore Interview] [00:01:00] Be sure to check in with Autoblog for tons of great photos, video and editorial coverage on all things Frankfurt. For Autoblog, I'm Adam Morath. Autoblog Minute is a short-form video news series reporting on all things automotive. Each segment offers a quick and clear picture of what's happening in the automotive industry from the perspective of Autoblog's expert editorial staff, auto executives, and industry professionals. Frankfurt Motor Show Bentley Jaguar Mercedes-Benz SUV Concept Cars Electric Autoblog Minute Videos Original Video