Rwd 4dr Glk350 Glk-class P01 Premium Package, Panorama Sunroof, Power Liftgate, on 2040-cars

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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.

Promo video shows what the Mercedes G500 4x4 can do

The Mercedes-Benz G500 4x42 is still nominally a show car, but it they're not treating it like one. They've provided their usual video follow-up to the press release and still photo launch, and they've made enough of the beasts to hold a press launch in Granada, Spain. It's even got AMG's brand new twin-turbo V8 engine in it, one that gets the 6,000-pound truck from 0-62 miles per hour in about 6.5 seconds. The only thing it needs to be a going concern is license plates; we guarantee it's not waiting on customers. Autocar could be jumping the gun, but they say it's expected to go on sale later this year for a price in excess of 200,000 pounds ($308,770 US) in the UK. Above is the promotional video, below is footage from GT Spirit from the press launch – notice how the G63 AMG in the background looks, shall we say, pedestrian. We're going to be crawling all over this truck at the Geneva Motor Show, and if we can find the keys, we might even drive it over the other show cars and out the door... or the nearest wall. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2015 Mercedes-Benz SLK250 Quick Spin [w/video]

We car writers tend to have a occupationally limited focus. Autoblog's stock in trade is automotive news and new car reviews, which often steers us towards forgetting existing models about 17 minutes after we've driven it a second time. You guys like reading about the new hotness, too, so it tends to work out. But the wonderful fact is that every car sold today will have a rich/interesting/heroic/tragic life for years to come. And, occasionally, even obsolete makes and models stay interesting. That was my thinking when this 2015 Mercedes-Benz SLK250 came into our fleet. Set to be replaced with the SLK300, with that car's 2.0-liter turbo'd engine, the 250 is already running out the clock in Mercedes dealerships. What's more, my test car came complete with – are you ready for this? – a six-speed manual transmission. I can't tell you the last exact model of Benz that I'd driven with a stick shift, but I can assure you that its engine was carbureted. Considering the odd spec and replacement timeline, my question, as I drove the SLK for a week: was this a unicorn destined to be a driver's dearest find? Driving Notes: Let me not bury the lede any more: the six-speed isn't a game changer for the SLK. Yeah, over the course of a few days I came to be comfortable with the slightly vague clutch and notchy shifter, but I didn't love it. I went blasting on a few back roads, and found the hand-shaker more involving to use than the standard auto, but it was long to throw and not overly precise when I moved up and down between second, third, and fourth. On the other hand, the old 1.8T under the SLK250's bonnet still felt well matched with the base SLK's boulevardier mission. Output of 201 horsepower and 229 pound-feet of torque doesn't give enough gumption to move the hardtop German lump with authority, but it was still enough to be quick off the line and offer easy highway passing. The turbo four didn't sound bad under full throttle, either, but it did rattle like old plumbing when idling in the driveway. Speaking of rattling: the adjustable and Airscarf-equipped seats did a lot of it. (Airscarf, you'll recall, is M-B's brand name for an in-seat fan that blows hot air on your neck; it's nice on a cold day.) Though comfortable and mildly bolstered, the driver's chair made all kinds of funny noises when I got in, got out, or cornered over 20 miles per hour. That's rough for a luxury car with 6,000 (or so) miles on it.