2001 Volkswagen Jetta Tdi Sedan 4-door 1.9l on 2040-cars

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German prosecutors investigating Audi for emissions scandal

After weeks of investigation into Volkswagen by prosecutors in Braunschweig, Germany, attorneys in Ingolstadt will also begin an examination into Audi's potential role in the emissions scandal. They reportedly received multiple criminal complaints that requested an inquiry, including one from Audi, according to Bloomberg. The prosecutors in Ingolstadt want to focus on people within the automaker that are responsible for emissions. However, the investigation is still too early in the process to identify any specific suspects. The German lawyers might also eventually combine their cases, but they remain separate for now. "Braunschweig took those parts that are clearly located at Volkswagen and asked us to keep the elements limited to Audi," a spokesperson for the Ingolstadt attorneys told Bloomberg. Audi has 2.1 million vehicles worldwide with Volkswagen Group's emissions-cheating four-cylinder diesel, including an estimated 13,000-14,000 of them in the US. The Environmental Protection Agency also recently filed a second violation notice against the 3.0-liter TDI V6 that was used in several of the company's models here, and the automaker responded with a stop sale for them. VW Group's carbon-dioxide emissions cheating in Europe also reportedly involves some Audi models. In that case, engineers admitted to artificially improving test results to achieve the cuts that the automaker requested.

VW decides against active-cooling system for e-Golf lithium battery

When the 2015 VW e-Golf was introduced at the LA Auto Show last year, VW said it would come with a water-cooled battery. During the Detroit Auto Show, when the car was trotted out again, VW released a new press release that stripped out the "water-cooled" language, but this change went unnoticed. During a recent VW event in Germany, a friend from Green Car Reports realized that the battery on display did not seem to have any water-cooling mechanisms. That set us off on a bit of a sleuthing and we have now learned that VW is not going to include any active cooling in the upcoming e-Golf. In fact, the company is entirely confident that this car - because of what it's designed to do - doesn't need it. "The need for a cooling system wasn't there" - VW's Darryll Harrison VW has been working on an electrified Golf for ages now, and so changes to the plan are to be expected. But battery cooling is vitally important not just to keep the car operating properly but because when things get too hot, there can be serious public relations problems. Nissan began testing a new battery chemistry for the Leaf in 2013 after an uproar from warm-weather EV drivers in Arizona who were experiencing worse-than-expected battery performance. The Leaf has always used an air-cooled battery, which is another way to say that there is no active cooling system (more details here). Tesla CEO Elon Musk once said this approach is "primitive." So, why is VW following the same path? We asked Darryll Harrison, VW US's manager of brand public relations west, for more information, and he told AutoblogGreen that VW engineers discovered through a lot of testing of the Golf Mk6 EV prototypes, that battery performance was not impacted by temperatures when using the right battery chemistry. That chemistry, it turns out, is lithium nickel manganese cobalt oxide (NMC) in cells from Panasonic. These cells had "the lowest self-warming tendency and the lowest memory effect of all cells tested," Harrison said. He added that VW engineers tested the NMC cells in places like Death Valley and Arizona and found they didn't warm very quickly either through operation, charging (including during fast charging) or through high ambient temps. "The need for a cooling system wasn't there," Harrison said.

Volkswagen rules out Eos successor

When Volkswagen introduced the Eos back in 2006, hard-top convertibles were all the rage – in North America, in Europe and around the world. But the trend, billed at the time as the best of both worlds, has long since subsided, leading to VW axing the Eos several months ago. And don't count on it getting a successor at some point down the line, either. At the Detroit Auto Show earlier this week, VW R&D chief Heinz-Jakob Neusser told Autocar that the Eos is down for the count. In fact it is "maybe the first model we take out of the market" in a reversal of the momentum that has seen the German automaker expand its lineup incrementally over the past several years – although the Chrysler-built Routan minivan was also canceled around the same time. The place the Eos occupied in VW's North American lineup is largely being taken by the more charismatic Beetle Convertible, and in Europe and other markets by the Golf Cabriolet that's still based on the previous-generation hatchback. The Eos, however, isn't the only hard-top convertible withdrawn from the market in recent years. Tin-top cabrios like the Lexus IS and SC, Cadillac XLR, Chrysler 200, Pontiac G6 and Volvo C70 have all gone the way of the dodo – as have Euro-market coupe-convertibles versions of models like the Ford Focus, Opel Astra, and Peugeot 207. The arrival of the Buick Cascada just goes to show that soft-roofed convertibles have won out, particularly as far as four-seat cabrios are concerned. The one notable exception where folding hard-tops are still gaining traction is among mid-engined exotic supercars like the Ferrari 458 and McLaren 650S, both of which opted for solid folding roofs instead of fabric ones. We've yet to see, however, which approach Lamborghini will take with the Huracan Spyder or Audi will with the next-generation R8, the predecessors of both of which featured fabric roofs.