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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.

2019 Mercedes-Benz G-Class vs big luxury off-roaders: How they compare on paper

During our first drive of the 2019 Mercedes-Benz G-Class, the all-new SUV's product manager was asked to identify competitors that might have been benchmarked in its development. The look on his face was about the same as if someone had asked him to recite King Lear in Klingon. As far as Andreas Hoeppel was concerned, the G 550 and AMG G 63 doesn't actually have a rival, or at least something the engineers and designers thought to compare it against. The G-Class is a G-Class, who cares what the other guys are doing? Well, in case you care, we figured we'd plug the new G-Class' specs into the old Autoblog Comparo Generator 3000 (TM) to see how the G 550 and AMG G 63 compare to the Range Rover and its mightiest SVAutobiography Dynamic model, plus the Lexus LX 570 and Bentley Bentayga V8. Frankly, Heir Hoeppel was onto something as each of these is wildly different. But, they do share some common elements: giant size and weight, ultra-lux interiors, and far more off-roading capability than other luxury SUVs offer and any of its owners are likely to ever utilize. Sad. So enjoy this trip down specification lane, and if you're still left hungry, you can always check out our Range Rover comparison or create your very own comparo. Off-Road Clearances and Capability All the fancy off-roading software and special cameras in the world won't do you a lick of good if your SUV is too close to the ground or has low-hanging body work that'll get easily ripped off. As such, check out each of these uber-SUV's ground clearance, approach and departure angles, and wading/fording depths. In this case, the Range Rover has an advantage due to its air suspension that can raise itself into an Off-Roading height that's a whopping 2 inches higher than the new G-Wagen. Sadly for itself, Lexus only provides figures for its air suspension when in normal height. It could match or surpass the Range Rover for all we know (but doubt it). As Land Rover does provide figures for the Range Rover's approach and departure angles in normal and Off-Road height, you can get an idea of just how much clearance the new G-Wagen has without any fancy (and expensive to fix) raising and lowering air suspension hardware. In fact, its departure angle is better than even the Range Rover's Off-Road height. Bentley doesn't provide any such information despite touting the Bentayga's surprising off-roading talents.

Race recap: 2015 Singapore Grand Prix full of odd sideshows

What greeted the Formula One teams in Singapore? Confusion. The haze was so thick that observers wondered if the race would be held at all. Then practices began, and Mercedes-AMG Petronas driver Nico Rosberg took the first one, but the team fell away after that. Mercedes said it couldn't get the tires turned on, but no one believed the Silver Arrows was in genuine trouble. Then qualifying set the confusion in stone. Ferrari driver Sebastian Vettel laid down the best time in Q3, taking the team's first pole position since Germany in 2012. Daniel Ricciardo got his Infiniti Red Bull Racing into second, about one tenth behind Vettel. (That may make the team feel better after Ricciardo publicly asked for a better engine than the current Renault unit, and team advisor Helmut Marko said the outfit will quit F1 at the end of this year if it can't get a stronger powerplant for 2016.) Kimi Raikkonen put the second Ferrari in third, Daniil Kvyat put the second Red Bull in fourth. And only then came the Meredes'. Lewis Hamilton's best got him fifth, the Brit saying, "We don't really know what we have got wrong. For some reason the tires are not working on the car. We do the warm-up the same as everyone else and then you see someone one second up the road." For added emphasis on the reversal of fortune, his time was 1.6 seconds behind Vettel's. Teammate Rosberg is next to him in sixth, a further half a second back. Williams is still a hurting a bit on slow tracks, so Valtteri Bottas could only get into seventh ahead of Max Verstappen in the Toro Rosso and teammate Felipe Massa in ninth. When the red lights went out, the 2015 Singapore Grand Prix would get both less interesting and more interesting all the way to the final lap. The men up front got good getaways, and the order into Turn 1 was Vettel, Ricciardo, and Raikkonen. The race finished with those three in that order, never having conceded position. Vettel's Ferrari enjoyed the track so much that he laid a second per lap into Ricciardo for the first five, then relaxed. He'd let the gap come down later in the race a couple of times, but any time he wanted to see what his mirrors looked like without anyone in them he'd take off again. Rosberg took fourth position after holding down sixth for the first stint. It looked like he'd have an even worse day - for a Mercedes driver - when he had problems getting his car started and onto the grid before the race.