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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.

Weekly Recap: Mercedes continues the pseudo-coupe craze with AMG-tuned CUV

But as BMW's X6 has demonstrated, sport sells in in the crossover segment, and Mercedes is giving the people what they want. BMW proved there is a market for crossover utility vehicles designed to look like coupes – as much as a vehicle with four doors and noticeable ground clearance can look like a coupe, anyway. Now comes the reply from Mercedes-Benz: the GLE Coupe. The rakish crossover is a harbinger of things to come from Mercedes, as it begins the company's transition to a new nomenclature and marks the debut of the AMG Sport line. It also continues the recent coupe craze. Designers from many automakers, like Nissan and Volkswagen, have increasingly turned to swoopy, dramatic styling to make utility vehicles and sedans seem more desirable. By revealing the GLE 450 AMG Sport model first, Mercedes is clearly hoping to cast the GLE Coupe as a sportier, lifestyle-oriented alternative in its lineup of beefy crossovers and SUVs. Mercedes used the word "sport," or a variation of it, 53 times in its press release, so uh yeah, it's sporty. It's not an empty promise: Benz means business with the AMG Sport line. This GLE Coupe gets a 3.0-liter biturbo V6 rated at 362 horsepower and 384 pound-feet of torque paired with Mercedes' new nine-speed automatic transmission, and it runs with 4Matic all-wheel drive. Specs on the other GLE Coupe models were not disclosed. But as BMW's X6 has demonstrated, sport sells in in the crossover segment, and Mercedes is giving the people what they want. After all, more than 260,000 people have bought X6s since 2008, and Mercedes wants a piece of that. From certain angles, the GLE Coupe even looks vaguely like an X6. "This is really a vehicle that is all about status," said Dave Sullivan, product analysis manager for research firm AutoPacific. "You can buy a SUV that doesn't have the inherent qualities of a SUV, such as cargo hauling. People will likely be drawn to the looks. Coupes are all the rage." BMW, however, isn't running from the fight, and the updated 2015 X6 is arriving in showrooms this month. It also added a smaller sibling, the X4, to its coupe-crossover stable in July. The GLE Coupe arrives next year, though Mercedes hasn't specified exactly when it will hit showrooms from the factory in Alabama, or specified details on the rest of the non-AMG Sport models. In 2008, it was surprising the X6 was a hit. In 2015, it will be even more surprising if the GLE Coupe isn't.

The first trailer for Top Gear's 24th season shows a hands-free drag race

In the excitement over Amazon's new motoring show, it's important to remember that there's a certain series from the BBC that's attempting to get its mojo back for a 24th season. Yes, we're talking about Top Gear. Since Chris Evans' departure earlier this year, Top Gear news has been relatively sparse, particularly as The Grand Tour and its hosts Jeremy Clarkson, James May, and Richard Hammond seized headlines. But on Christmas, watchers of the series' YouTube channel caught a glimpse of the first scene from the next season. Featuring hosts Matt LeBlanc, Chris Harris, and Rory Reid in what looks like a trio of old, dilapidated cars. We're thinking TG is running a taxi comparison. There's a London black cab and a Mercedes-Benz W210 – a favorite of European cabbies – but we aren't sure where Harris' boxy wagon fits in. Did the Volvo 850 Estate ever serve as a livery vehicle? But it's the basis for this comparison that's weird, because the hosts appear to be having a no-hands drag race. The cars veer off in different directions, traveling across what looks like a snow-covered dirt lot. We're assuming hilarity ensues. And while we don't quite know what they're hoping to accomplish, we are looking forward to watching it go down. Top Gear's 24th season doesn't have an official air date, and the video ends only with a cryptic "Coming Soon." Expect to hear more in the next few months.