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2015 Mercedes-Benz ML400 Quick Spin

Mercedes-Benz has taken a risk in its quest to downsize its engine range. For 2015, the brand's popular M-Class five-passenger CUV did away with its trusty 4.4-liter, twin-turbocharged V8, and has replaced it with a 3.0-liter, twin-turbocharged V6. It's no surprise that power is down thanks to this move. Outputs of 402 horsepower and 443 pound-feet of torque are replaced by 329 hp and 354 lb-ft, but weight is down significantly as well. The new ML400 is nearly 300 pounds lighter than the 4,982-pound ML550. Will that tradeoff be enough to satisfy a buying public that's embraced falling fuel prices by buying bigger and thirstier vehicles? To find out if the blown V6 is a suitable replacement for the twin-turbo V8, we spent a week at the helm of the all-new ML400. Driving Notes This 3.0-liter, twin-turbocharged V6 is the same engine being offered in the C400 and E400 sedans. Typical of today's turbocharged engines, peak torque is spread lavishly across the rev range, from 1,600 to 4,000 rpm. That's not as generous a spread as the ML550, which offers all its torque between 1,600 and 4,750, but the power on offer is easy to access. Importantly, the new V6 never feels flat-footed or unable to answer our commands. In fact, the ML400 feels even quicker than its six-second sprint to 60 would indicate, although it's not so fast as to challenge the 5.3-second time of the ML550. After a slight and expected bout of turbo lag, the power arrives suddenly and proceeds linearly until just south of the engine's 6,500-rpm redline. The throttle response is soft in Eco mode, as expected, but sharpens up slightly when the fuel-sipping mode is off, where the gas pedal is still easy to modulate. It's a quiet engine, too. Compared to the brawnier exhaust note of the old ML550 or the howling six-cylinder in the BMW X5 xDrive35i, the ML400's note is smooth and refined, befitting of a V6. Its turbocharged nature is instantly noticed, though. Get on the throttle and the 3.0-liter happily hisses its way up the tachometer. But, it's only when you get on the throttle hard that the engine really weighs in. In day-to-day driving and traffic its soundtrack is unobtrusive and relaxed. The EPA rates the ML400's fuel economy at 18-miles-per-gallon city and a 22-mpg on the highway. That's better than the 14 city and 19 highway of the old V8 ML, but it still seems a bit low, especially for the highway figure.

Weekly Recap: Autonomous driving goes commercial in Nevada

Nevada granted Daimler Trucks North America the first license to run an autonomous commercial vehicle on public roads in the United States Tuesday, marking another milestone in the technology's rapid advancement. Gov. Brian Sandoval and Daimler truck chief Wolfgang Bernhard promptly used the license to lap Highway 15 near Las Vegas in a newly revealed Freightliner Inspiration Truck. It was a clear signal that autonomous driving is big-rig reality, though it's still a long way from widespread use. Nevada certified two of Daimler's Freightliner Inspiration Trucks, which use the company's Highway Pilot system with a stereo camera, radar, and lane-keeping collision-prevention features to regulate the brakes and steering. The radar component has a long-range sensor that can cover 820 feet at an 18-degree angle and a shorter-range unit that stretches 230 feet at a 130-degree angle. The Inspiration trucks are based on the existing Freightliner Cascadia Evolution model used on US roads. In addition to the autonomous technologies, it also has futuristic design cues, including blue lighting in the front and a new hood and grille. While there are only two Freightliner Inspiration trucks in existence, Daimler expects to bring the Highway Pilot system into mass-produced big rigs by 2025, in time to capitalize on the market's predicted growth. The German truckmaker predicts the global hauling market will triple by 2050, and the United States will be a key part of that growth. Trucks carry 69.1 percent the nation's domestic freight tonnage and hauled 9.7 billion tons of freight in 2013, according to the American Trucking Association. Daimler expects autonomous driving to augment this growth, and perhaps evolve the role of the truck driver. Still, the company points out autonomous tech is not meant to replace drivers, but to assist them and relieve fatigue and monotony on long hauls. The driver has to stay in control for passing, in city traffic, and when hooking up the trailer. The company said autonomous driving also offers the potential for improved fuel economy – tests showed a five-percent gain – and lower maintenance costs. Daimler also said the technology could reduce congestion on the road. Much of this is attributable to the constant flow of traffic, which is aided by autonomous driving. While the benefits are becoming increasingly apparent, autonomous technology is still met with skepticism.

Renault-Nissan rejig how they manage Daimler partnership, sources say

PARIS — The Renault-Nissan-Mitsubishi alliance is set to scrap a role overseeing ties with Daimler in favor of individual relations with the German group, three sources told Reuters, as they try to better manage a partnership that has not met initial hopes. The shift comes as alliance-level executive Jacques Verdonck, who was in charge of the cooperation with Daimler, retires at the end of the month, the sources familiar with the matter said. France's Renault will instead rely on its head of partnerships, Sandra Gomez, while Nissan will do the same with Catherine Perez. Mitsubishi will also have a person in charge of partnerships, the sources said, adding the bilateral approach was in line with the new "leader-follower" strategy of the alliance. That involves leaning on the strengths of each carmaker in certain areas. Renault and Daimler declined to comment, while Nissan could not immediately be reached for comment. The plan marks another shift following the end of the Carlos Ghosn era at the alliance. The architect of the Franco-Japanese partnership, who also extended the collaboration to Daimler, was arrested on financial misconduct charges in Japan in late 2018, before fleeing to Lebanon in 2019. He denies any wrongdoing. His exit strained already difficult relations between Nissan and Renault, which are now working to get back on track with cost-saving joint production projects among other steps. The partnership with Daimler - which owns high-end brand Mercedes-Benz, contrasting with the more accessible models produced by the others - has also looked in danger of losing steam. Nissan and Renault, both hit by losses, recently sold down their stakes in the German group. Collaborations on Renault's compact Twingo car and Daimler's Smart model are set to end, and some targets for industrial cooperation have been downgraded over the years. But Daimler still has a factory in Mexico with Nissan, and has been exploring the possibility of jointly developing at least one large van model with Renault. An industry shift towards electric vehicles could yet yield other opportunities, one of the sources said. "The collaboration with Daimler is at present made up of Renault-Daimler projects, Nissan-Daimler ones and some between the three," another of the sources said, with yet another saying that the changes reflected a more pragmatic approach.