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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.

2015 Mexican Grand Prix is a lot like old times

The last time Formula One visited Mexico, in 1992, 26 cars powered by eight engine manufacturers (counting Honda and Mugen-Honda separately) lined up on the grid; it would have been nine engine makers but the Brabham-Judd cars failed to qualify. In 1992 Lewis Hamilton was seven years old, Sebastian Vettel was five, Max Verstappen was still five years away from being born. Two of the current Sky Sports F1 commentary team, Martin Brundle and Johnny Herbert, were drivers. The starting three were Nigel Mansell on pole – 39 years old, this the year he'd win his only World Championship – and Riccardo Patrese both driving Williams-Renault cars, followed by Michael Schumacher in a Benetton-Ford. Only 13 of the 26 starters would finish. The circuit is has been reworked to today's safer standards, the track surface is brand new and slippery, but the atmosphere and packed grandstands haven't changed. Nico Rosberg was another point of consistency, scoring pole position for the fourth race in a row to beat his now-World-Champion teammate Hamilton by almost two-tenths of a second. The last time Rosberg turned pole position into a victory? The Spanish Grand Prix back in May. Vettel locked up third for Ferrari, followed by the Infiniti Red Bull Racing duo of Daniil Kvyat and Daniel Ricciardo. Williams went two-up as well, Valtteri Bottas in sixth ahead of Felipe Massa in seventh. Max Verstappen turned in a great late lap to reserve eighth place, Sergio Perez did all he could in front of his home crowd to get ninth, teammate Nico Hulkenberg the caboose in the top ten. In that 1992 race the first three on the grid finished the race in the same order after Mansell dominated, and it was almost the same in 2015. If Rosberg had driven the whole season like he drove today the Driver's World Championship would still be up for grabs. He got a great start and held his line through the first corner, coming out ahead of Hamilton through the initial kinks, pulling away as soon as he got to the straight. Hamilton was never more than a few seconds behind, but every time the Brit inched closer the German found a few more tenths to keep his distance. The field got bunched up when the Safety Car came out on Lap 53 after Vettel spun and got stuck in the barriers, but Rosberg handled the restart perfectly. Both drivers made small mistakes in the last few laps while driving on the edge, but Rosberg earned a strong victory, crossing the line two seconds ahead of his teammate.

Mercedes-Benz CLA45 AMG coming to the New York Auto Show

Mercedes-Benz showed off the CLA45 AMG at a private event on the eve of the Geneva Motor Show, but was determined not to let it be photographed. We can talk about it, though - after all, a teaser image was released to promote the new Sony game Drive Club. The CLA45 AMG will use the same powertrain as the A45 AMG, which means a 2.0-liter turbocharged four-cylinder with 360 horsepower and 332 pound-feet of torque. And that means a small four-door coupe sedan with the highest horsepower-per-liter in the segment. It will shift through the same seven-speed dual-clutch transmission, should also run out of speed at 155 miles per hour and have that three-stage stability control system.
As with its hatch sibling, the CLA is already so aggressive on the outside - and the parent company so anxious not to demolish the sedan's 0.22 coefficient of drag - that not much has been done to the cranked-up CLA. Even the rather thin tires on the standard only get a little less thin on the hotter variant. Inside will be the telltale AMG signs, with lots of red detailing and that flat-bottomed wheel among the giveaways. We'll know more later this month when the wraps come off at the New York International Auto Show.