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Here’s how 20 popular EVs fared in cold-weather testing in Norway

Electric vehicles are known to suffer diminished performance in cold weather, but some do a better job than others hanging onto their range capacity while cabin heaters and frigid outdoor temperatures sap power from their batteries. Recently, the Norwegian Automobile Federation put the 20 of the best-selling battery-electric vehicles in the country to the test, to see not only how winter weather affected their range but also their charging times. The major findings: On average, electric vehicles lost 18.5% of their official driving range as determined by the European WLTP cycle. Electric vehicles also charge more slowly in cold temperatures. And interestingly, the researchers learned that EVs don’t simply shut down when they lose power but instead deliver a series of warnings to the driver, with driving comfort and speed levels maintained until the very last few miles. Because itÂ’s Norway, the worldÂ’s top market for electric and plug-in hybrid vehicles by market share, the test included many EVs that arenÂ’t available here in the U.S. But there are many familiar faces, among them the Nissan Leaf, Tesla Models S, 3 and X, Hyundai Kona (known here as the Kona Electric) and Ioniq, and Audi E-Tron. In terms of range, the top-performing EV was the Hyundai Kona, which lost only 9% of its official range, which the WTLP rated at 449 kilometers, or 279 miles, compared to its EPA-rated range of 258 miles on a full charge. It delivered 405 km, just enough to nudge it ahead of the Tesla Model 3, which returned 404 km. Other top performers included the Audi E-Tron, in both its 50 Quattro (13% lower range) and higher-powered 55 Quattro (14% lower) guises; the Hyundai Ioniq (10% lower); and Volkswagen e-Golf (11% lower). At 610 km (379 miles) the Tesla Model S has the longest WLTP range of all models tested and went the furthest, but still lost 23% of its range, though it also encountered energy-sapping heavy snow at the end of its test, when many cars had dropped out. The Model 3 lost 28% of its range. The worst performer? That goes to the Opel Ampera-e, better known stateside as the Chevrolet Bolt. It traveled 297 km (about 184 miles) in the test, which was nearly 30% lower than its stated WLTP range. We should also note that Opel, now owned by Groupe PSA, is phasing the car out in Europe and that Chevy recently upgraded the Bolt here in the U.S.

Mercedes partners with Lufthansa to design executive jet cabins [w/poll]

Luxury automakers like to crow about their flagship models boasting first-class cabins, but the truly elite class of travelers know there's a class above that. We're talking about private jets, and now Mercedes is applying its skills to those as well. The German automaker isn't building its own jet aircraft. Its design department has, however, collaborated with Lufthansa to create a cabin space for executive jets that looks even more upscale. The concept integrates the walls, ceiling, and floor of the cabin into one fluid, continuous surface, with the furniture similarly integrated into the design with chairs, sofas, beds, and tables. It's even got a fish tank on board and auto-dimming touchscreen glass panels in front of the windows that can control the infotainment system. The design is being showcased by Mercedes-Benz Style and Lufthansa Technik at the European Business Aviation Convention and Exhibit (EBACE) in Geneva. It's the same show where Brabus displayed its jet cabin design, rival BMW Designworks did the same, and where the Mercedes' Eurocopter cabin design debuted four years ago. There, Mercedes hopes to attract orders from private customers. If the finished product ends up half as stunning as these design renderings look, we don't doubt they'll find a few takers. Mercedes-Benz Style and Lufthansa Technik develop VIP cabin for short- and medium-haul aircraft: State-of-the-art luxury high above the clouds Stuttgart/Geneva, May 19, 2015 In time for EBACE 2015, which will take place from 19 to 21 May 2015 in Geneva, Mercedes-Benz Style and Lufthansa Technik have announced their cooperation on the design and completion of VIP aircraft cabins. The two companies will jointly develop an entirely innovative, luxurious and integrated cabin concept for short- and medium-haul aircraft. Dynamic architecture instead of traditional interior cabin design: Under the joint approach adopted by the two companies, the traditional separation of ceiling, wall and floor will be entirely replaced by a dynamic, spiral layout. This gives rise to new, independent spatial zones without the typical arrangement of seat and wall elements. The new sense of space is additionally reinforced by Mercedes's typically strong emphasis on contrast in terms of material, colour and lighting. The overall design is characterised by the aesthetic appeal of state-of-the-art luxury embodied in the Mercedes-Benz brand.

Mercedes C-Class Coupe due to go on sale next December

While we expect to see the coming Mercedes C-Class convertible sometime next year, perhaps at the Paris Motor Show, Auto Motor und Sport reports that the C-Class Coupe will go on sale in December 2015 (probably in Europe first) - it's possible we'll see it debuted at the same time as the cabrio. The German magazine says the two-door will have sharper lines on a body that is four inches longer, almost two inches wider and a fraction of an inch lower than the sedan, dimensional aggrandizement that will be put to good effect on the AMG version coming in 2016. We'll have to wait for information on powertrains, which should hew to the sedan's lineup in addition to whatever else M-B might bring over here, topped off by the 503-horsepower, twin-turbo V8 in the AMG variant. Speaking of which, the 'last-generation' C63 AMG Coupe is still on sale until spring of next year, if you're a fan of the classics. Or you can wait on news of the C-Class four-door coupe, if niches inside of niches are what you're really after.