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Why it's difficult to accurately test the efficiency of a plug-in car

When it comes to electric vehicles and plug-ins in general, the Environmental Protection Agency-certified range is a hugely important number. While actual range anxiety is largely psychological, the magic number does provide a point of comparison of buyers considering one EV over another. The driving distance is also often touted by automakers when marketing their models. Unfortunately, as Green Car Reports finds in a recent deep dive, the way the EPA calculates the figure is a convoluted mess, and discovering the reasons why is definitely worth the read. The issue isn't about bad science but instead comes down to vague wording. The EPA's accepted range test is sourced from an evaluation called J-1634 from the Society of Automotive Engineers, and it seems to provide balanced results for vehicles that automatically reach a single state of charge when plugged in. However for models with multiple charge settings, the situation gets complicated very quickly. Of course, these modes are often created in the software, meaning that a car's certified driving distance can change with just a few taps of the keyboard without the real world results owners might experience actually changing. By showing the test's effects on the certified range for the Tesla Model S, Nissan Leaf and Mercedes-Benz B-Class Electric Drive over the last few years, Green Car Reports makes a compelling argument that it's the evaluation that needs to change. Thankfully, it appears that the solution is a very simple one. Get the details here.

Recharge Wrap-up: Tesla firmware update videos, Mercedes S500 Plug-In Hybrid

See the Tesla Model S with Firmware 6.0 in action in new videos from Teslarati. The large software update includes improved traffic-based navigation, a calendar function, updated power management, "Location-Based Smart Air Suspension" as well as other improvements. Drivers get more route options to save energy, and more control over how the car saves energy. The car can also remember ride height settings when driving in those same locations again. Additionally, you can start and drive the car without a key, just using the smartphone app. See how it all works in the videos below, the second of which focuses on pairing with the updated phone app. The California Public Utilities Commission (CPUC) has deemed ride-hailing app Uber's carpooling service illegal. The way the UberPool service is categorized by the CPUC, charging multiple riders separate fares for a single ride runs afoul of the law. The technical details are a bit convoluted, and what supporters could deem arbitrary, but Forbes delves into the details a bit further to try to make sense of California's intentions (even considering the possibility of other ride services, such as airport shuttle companies, fueling the fire). Lyft - which operates a similar service called LyftLine - and Sidecar have also received notices from the CPUC. Read more at Forbes. China's recent enthusiasm for electric vehicles could be largely attributed to a single person, Ma Kai. After the Politburo member was named vice premier, he encouraged maintaining and increasing EV subsidies when China sought to decrease them. He also seems ready to fight for more EV deregulation to encourage more clean vehicles. Read more about Ma Kai and what he's done for China's EV legislation at Automotive News. Mercedes-Benz begins deliveries of the S500 Plug-In Hybrid this month. The high-tech luxury PHEV features energy saving modes based on driver, route and traffic, and features a haptic accelerator that can signal when the driver should ease off to save power. It's powered by a biturbocharged V6 and 85-kW electric motor. Its 8.7-kWh battery offers about 20 miles of electric driving. The S500 plug-in starts at about $146,000. Read more in the press release below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Mercedes G 500 4x4 is mighty mean and bright lime green

The Mercedes-Benz G500 4x42, finally ready to meet the crowds at the Geneva Motor Show, might just be the best factory-prepped expedition off-roader on the market, should Mercedes choose to build it. The short story is that some well-heeled admirers of the G63 AMG 6x6 said, "It's nice, but can you take it down a notch?" And by "notch" they meant "an axle." So the G500 4x42 gets just two portal axles instead of three, and a slew of other features. The 4x4 squared offers up a standard G-wagen body, but instead of the 5.5-liter twin-turbo V8 from the G63, there's a new 4.0-liter twin-turbo V8 with 422 horsepower and 450 pound-feet of torque. Compared to the standard G500, the track is 11.8 inches wider, the street-cred rims being 22-inchers on 325/55 R-series tires. When it's time to get dirty, they can be swapped for an optional set of 18-inch wheels with 37-inch beadlock tires. With that setup and the same wheelbase as the G500 LWB, ground clearance and fording depth are more than doubled to 17.7 inches and 39 inches respectively, the angle of approach goes from 36 degrees to 52 degrees and the angle of departure leaps from 27 degrees to 54 degrees. Breakover angle is bumped from 21 degrees to 47 degrees, a two-piece stainless steel undertray protecting the sensitive bits when you push it. The only parts that get a raised eyebrow are the carbon fiber wheel arches and bumpers, which might behave badly when they meet an immovable granite object. To escape the sensation of driving the Taj Mahal in urban environments, there's a twin spring-and-damper setup at each wheel. One of the spring-damper combos is electronically controlled and adjustable, and when called into action via the Comfort or Sport mode, takes control of wheel action; even when passive, it will kick in to automatically to stiffen the body if it detects evasive maneuvers. On top of all that, to remind you that you're in a Mercedes the interior is fitted out with Designo leather trim and diamond-quilted microfiber. Mercedes is going to gauge its Geneva reception before deciding to build it, a hurdle we're sure will be overcome. Car and Driver drove it and verified it's the real deal, with pricing - if it's built - speculated to land between the G63 AMG and G65 AMG. The press release below has all the details. Related Video: Near-series show car G 500 4x42: The G-Class Squared Stuttgart, Feb 21, 2015 -- Only a G-Class can be better than a G-Class.