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Daimler exec hypothetically discusses 3-cylinder engines for small hybrids

Is three the magic number of cylinders for Mercedes-Benz parent Daimler and its efforts to build smaller powertrains for its compact hybrids? Potentially, yes, the German automaker could see the need for three-cylinder mills, Automotive News reports. The company doesn't have any plans for them as of yet, though. Daimler executive Bernhard Heil talked with Automotive News about the challenges of using four-cylinder engines in a front-wheel-drive setup and said that three-cylinder engines could work in transverse-mounted powertrains for hybrid cars. For now, though, the company doesn't actually have any plans to go in that direction, Mercedes-Benz spokesman Christoph Horn said in an e-mail to AutoblogGreen. Horn wrote that Heil "actually said that if ever MB would use a three-cylinder engine than [it would be] in a configuration where space is restricted, such as when using a hybrid power train in a compact car." Of course, the only compact "hybrid" that Mercedes-Benz has is the 2015 C-Class, but that refers to the "hybrid" body is made of 48-percent aluminum, up from the current nine percent, as well as steel. It has nothing to do with the powertrain. Beyond that, there's always the Mercedes-Benz S500 Plug-in Hybrid that the company unveiled at the Frankfurt Motor Show last fall, but that model, which will debut in Europe later this year and arrive stateside next year, has a 3.0-liter turbocharged V6 and an 80-kilowatt electric motor that propels the plug-in from 0 to 62 miles per hour in 5.5 seconds. Not exactly three-cylinder territory, that.

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.

Five B-Class F-Cells go from SF-LA using public hydrogen stations

California's hydrogen islands in Los Angeles and San Francisco finally got the bridge they needed to become the "Hydrogen Highway." With the completion of a permanent public station in Coalinga built by FirstElement Fuel, 205 miles north of LA, 183 miles south of SF, fuel-cell-vehicle owners can complete the road trip without worry. Mercedes-Benz did just that with five B-Class F-Cell customers, spending three days covering 1,000 miles and filling up only at public permanent stations in Burbank, Coalinga, West Sacramento, and Emeryville. Mercedes says there are ten stations in California now, but more than 40 are scheduled to open in 2016, and about ten more every year after that through 2023, when there should be 123 open stations. The company's US fuel-cell fleet is 70 strong and has covered more than two million miles in the five years they've been on the roads here. On average that means each car has driven just 5,714 miles per year, but that number should go up now that they can stretch their hydrogen stacks. The press release below has more information. Nearly 1,000 fuel cell electric miles: Crossing California on Hydrogen - Five Mercedes-Benz B-Class F-CELL complete emission-free drive from Los Angeles to Northern California while only filling up at public hydrogen stations - "California Hydrogen Highway" is connecting the dots - U.S. F-CELL customers have accumulated over 2 million miles since 2010 Stuttgart, Oct 27, 2015 - Mercedes-Benz B-Class F-CELL customers ventured beyond Southern California last week for the very first time, while only filling up at existing public hydrogen stations along the route from Los Angeles to San Francisco. The opening of a new hydrogen station in Coalinga along the I-5 corridor made this opportunity possible. A team driving five B-Class F-CELL refilled at four permanent hydrogen fueling stations located in Burbank, Coalinga, West Sacramento and Emeryville, accumulating nearly 1,000 miles over the course of their three day trip. Three F-CELL customers were accompanied by a team from Mercedes-Benz Research and Development North America based in Long Beach. The purpose of this unique road trip was to highlight the growing hydrogen station network and to show that the vision of the California Hydrogen Highway is becoming reality. Early adopter Loki Efaw who has been an F-CELL driver since 2011 believes fuel cells are the future: "I don't want a car that only takes me to work and back before I have to plug it in.