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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.

Mercedes pays tribute to 1955 Mille Miglia with special-edition SL

The Mercedes-Benz SL is one of the longest-running nameplates in the business, and its history has been marked with numerous achievements. But few were as impressive as the 1955 running of the Mille Miglia, and Mercedes pays tribute to that race and the results it achieved there with this latest special-edition roadster. Called the SL Special Edition Mille Miglia 417, this roadster starts with the eight-cylinder SL550 with dynamic stability management and adaptive damping and adds on several highlights. Red trim adorns the front spoiler, the stripe across the matte carbon rear spoiler, the brake calipers and the rims of the black AMG Performance wheels. The red pieces accent the matte black paint, while the interior features AMG Line sports seats with carbon-finish leather and red trim, along with a red and black nappa leather steering wheel and carbon trim. The SL arrives 60 years after the Mille Miglia in which a 300 SL driven by American gentleman racer John Fitch - bearing the number 417 and starting at 4:17 a.m. - led a 1-2-3 class finish, landing fifth overall and leaving many purpose-built racers in the dust. The special edition is confirmed for the US, arriving this fall with pricing to be announced closer to launch. SPECIAL EDITION SL "MILLE MIGLIA 417" Exclusive SL passion February 17, 2015 - Stuttgart -- Mercedes-Benz celebrates the 60th anniversary of a memorable motor racing success with an extraordinary special model of the SL Roadster. Its name commemorates the unexpected victory of a 300 SL in the production sports cars class at the 1955 "Mille Miglia", one of the world's most challenging long-distance races. What's more: the SL Special Edition "Mille Miglia 417" provides a special experience of the unique symbiosis of maximum comfort and motor racing spirit that traditionally characterizes every SL. The Special Edition adds a distinctive note, among other things, with red exterior highlights and fine materials in the exclusively appointed interior. The Mercedes-Benz SL Roadster is more than an icon. Passion shapes its character and its charisma – in the past and today. Legendary vehicles and their stories dominate the model history. One of them is told by the SL that started the famous "Mille Miglia" in 1955 with race number 417 at 4:17 am. After 11 hours, 29 minutes and 21 seconds it had completed the race distance of 1597 kilometres on public roads from Brescia to Rome and back.

2015 Belgian Grand Prix is a return to scheduled programming

With summer intermission over, the second half of the Formula One season commenced in the Belgian countryside at Spa-Francorchamps. After qualifying, it looked a lot like the first half of the season with just a few minor changes. Lewis Hamilton was even more dominant in his Mercedes-AMG Petronas than usual, regularly taking half a second out of his teammate in just the middle sector of the circuit. Teammate Nico Rosberg tightened it up a tad for his final hot lap, but Hamilton still took pole by 0.45 seconds ahead of Rosberg in second. With his Williams back at a power track, Valtteri Bottas got himself up to third, although more than a second behind Hamilton. Romain Grosjean in the Lotus in fourth had his best qualifying performance since his fourth-place grid spot at the 2013 US Grand Prix. This was a huge boon for Lotus, the team facing another financial issue off track that threatened to have its cars impounded as soon as they left the circuit. Grosjean had to have his gearbox changed before the conclusion of six races, however, so the five-spot penalty meant he'd actually line up ninth for the race. Sergio Perez put the Sahara Force India in fifth, where we're more used to seeing his teammate Nico Hulkenberg, just ahead of Daniel Ricciardo in the Infiniti Red Bull Racing in sixth. Felipe Massa got the second Williams in seventh, in front of the second Lotus of Pastor Maldonado in eighth. Then came the first and only Ferrari in the top ten, Sebastian Vettel qualifying ninth after a disappointing Saturday for the scuderia; teammate Kimi Raikkonen suffered gearbox issues and qualified way down in 16th. Carlos Sainz took tenth in the Toro Rosso. A new start procedure in Belgium meant drivers had to handle clutches on their own, without the engineers finely tuning bite points between the garage and the start line. That was in conjunction with another rule limiting the kinds of radio messages possible between engineers and drivers, aiming to put more of the car in the drivers' hands. After an aborted start when Hulkenberg's car quit while sitting on the grid, Hamilton made the most of the new procedure. His start wasn't amazing but he beat everyone else off the line, while those behind were alternately getting bogged down or leaping ahead. Midway through the first lap the top ten was Hamilton, Perez, Ricciardo, Bottas, Rosberg, Vettel, Maldonado, Grosjean, Massa, Marcus Ericsson. At the end of 43 laps, Hamilton would still be in the lead.