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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.

Mercedes pickup could have Nissan DNA

Daimler and the Renault-Nissan Alliance are already close partners. Now it seems that the upcoming Mercedes-Benz midsize pickup might have a little Nissan DNA in it, too. Or maybe not, depending on how you interpret comments by Renault-Nissan CEO Carlos Ghosn. "I don't want anybody to think that because they announced a pickup truck, they have to make it with us. Not at all," Ghosn said at the New York Auto Show, according to Automotive News. "They are completely free to do it by themselves, to do it with somebody else, etc., and also, or to do it with us." The Mercedes Vans division is responsible for the truck's development, and the pickup is aimed at the popular global midsize segment against vehicles like the Ford Ranger and Toyota Hilux. There's no mention of any plans for the model in North America. Instead, Mercedes wants to focus on Latin America, South Africa, Australia and Europe for a launch slated before 2020. Ghosn was quite clear there was no decision either way as of yet. "Is this something that can eventually be on the table? I told you, everything is on the table between us," he said, according to Automotive News. If the two companies do decide to collaborate on a midsize truck, the timing would seem perfect. Nissan completed development of its NP300 Navara in 2014, and the automaker has been at work at least evaluating powertrains for the next Frontier possibly for 2019. Related Video:

Recharge Wrap-up: new Gigafactory drone video, Mercedes valet

A new, Tesla-approved drone video shows the progress of the Gigafactory. Recently, a video surfaced showing what Elon Musk said was just the "pilot plant," which is only a quarter of the size of the final planned Gigafactory. This new video not only shows the structure, but also the site surrounding it. We see more steel beams waiting to be erected, suggesting that the footprint of the finished building will be even more massive than that of the current standing structure. And if what Musk says is accurate, we've got a lot more to look forward to. Have a look in the video above, and read more at Teslarati. Tesla is paying hackers to find bugs in its website and products. In a posting on Bugcrowd, the electric automaker calls on "security researchers" to find vulnerabilities in the site itself, any domains owned by Tesla, any Tesla apps as well as Tesla hardware owned by the hacker like a Model S or the Powerwall. In exchange for the hackers' service, Tesla is offering rewards ranging from $25 to $1,000 for reported vulnerabilities. Tesla also promises not to sic the law enforcement on hackers who step forward to help, as long as they follow the rules. Read more at Teslarati. Daimler and Bosch are working on automated parking for Mercedes-Benz. In a properly equipped parking garage, the car would find an empty space and park by itself, and return to the driver when called upon. The groups are starting a pilot project for the autonomous valet feature with carsharing service Car2go, where it works the other way around. Customers will be able to call a car to a pick-up zone using a mobile app. When finished, the customer leaves the car in the drop-off zone, and the car takes care of the rest on its own. "Fully automated parking will be ready for mass-production before fully automated driving," says Bosch's Dr. Dirk Hoheisel. "Low driving speeds and the information from the car park infrastructure enable a fast implementation." Read more in the press release from Daimler. Volta has raised $7.5 million in funding to expand its free EV charging network. To offer free charging, Volta's chargers essentially perform double duty as billboards for what Volta calls "companies with a vested interest in the community." "Early Internet pioneers like Google became industry titans by first offering free consumer services online paid for by companies that advertised on their platforms," says Volta CEO Scott Mercer.