2006 Audi A4 Quattro Awd Prestige 4-door 2.0l Turbo on 2040-cars

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Recharge Wrap-up: Ferrock a carbon-negative cement substitute, Audi makes e-diesel

A cement alternative uses recycled materials and traps CO2 rather than producing it. Invented by David Stone at the University of Arizona, Ferrock uses recycled steel dust and glass to produce a substance stronger than conventional concrete. Cement has a high carbon footprint from the high heat needed to process the limestone. Ferrock needs no such heat, and it actually uses CO2 to harden, making it, as Stone calls it, a carbon-negative material. Learn more in the video above, see the transcript at PBS NewsHour and read more at Green Car Reports. Teslarati offers a detailed rundown of Tesla's new Valet Mode feature for the Model S. Part of the Firmware 6.2 update, Valet Mode allows the owner to disable certain performance features and block personal information when letting someone else drive the car. It limits the car's to speed to 70 miles per hour, and caps output at 80 kW. It can also disable mobile app access, Homelink, Bluetooth and wifi and the "Places" function, which stores addresses for you. The folks at Teslarati did find some shortcomings in the new feature, though. Read more at Teslarati. Audi has produced its first batch of e-diesel made from water and CO2. The fuel is made by reacting hydrogen from the water with CO2 to make long-chain hydrocarbon compounds called "blue crude." That can then be refined similarly to crude oil to make e-diesel, which is a fuel free from sulfur and aromatic hydrocarbons. That e-diesel can be used on its own, or mixed with fossil fuel diesel to power a vehicle. "In developing Audi e-diesel we are promoting another fuel based on CO2 that will allow long-distance mobility with virtually no impact on the climate," says Audi Head of Sustainable Product Development Reiner Mangold. Read more in the press release below. Fuel of the future: Research facility in Dresden produces first batch of Audi e-diesel - The verdict: Pilot plant produces high-quality diesel fuel - No need for mineral oil: e-diesel made from water, CO2 and green power - Minister Wanka: "Synthetic diesel using CO2 is a huge success" Audi has taken another big step in the development of new, CO2 neutral fuels: A pilot plant in Dresden has started production of the synthetic fuel Audi e diesel. After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high-quality diesel fuel a few days ago. To demonstrate its suitability for everyday use, Federal Minister of Education and Research Prof.

New Audi Quattro concept coming to Frankfurt?

We first saw the Audi Quattro Concept at the 2010 Paris Motor Show, and since then we've been tugged this way and that by a series of rumors as to whether the car will be built or not, and whether such a car will live at the accessible or the exalted end of the cost spectrum. A report in Germany's Auto Zeitung from June restarted the fires of gossip with a report that a production version of the concept will appear at the Frankfurt Motor Show, and put it firmly in the exalted sphere.
Now, just a month from the show, Auto Bild has a similar report, sketching out an upmarket car but on a different platform. Back when we drove it, the Quattro concept was built on a spaceframe based on the RS5 platform and got its go from a 2.5-liter five-cylinder engine with 380 horsepower and 354 pound-feet of torque (the show car got 408 hp from a turbocharged five-cylinder). The June report from Auto Zeitung said this new reveal would be powered by a modified version of the twin-turbo 4.0-liter V8 from the RS7 that would put out something like 650 hp. Auto Bild, on the other hand, reports that the engine will be tuned to something like 600 hp and the new concept will ride on an "enhanced" version of the A6 platform.
Both reports agree that the car we'll see will preview Audi's new design language with "tauter, more angular lines." Lightweight and exotic materials will be used in efforts to reach a supposed target weight of 1,200 kilograms (2,640 pounds), down from a target of 2,900 pounds in earlier report. Auto Bild says that Audi still hasn't decided whether to make a production version, but if they are correct about the direction of the concept, any retail offering based on it isn't going to be cheap.

VW recalling 2.64M vehicles worldwide over engine, light issues

Volkswagen is staging a massive, worldwide recall that's already grown from 1.68 million to 2.64 million vehicles and covers three different issues across a number of vehicles. We already reported on 61,000 Tiguans getting recalled over lighting issues - that was just in the US. Globally, however, VW will be recalling 800,000 Tiguans, according to Automotive News, with the focus on CUVs built between 2008 and 2011. The issue with the Tiguan relates to a simple fuse swap, so this is rather unremarkable, aside from the sheer number of vehicles being fixed. The real, troubling issues relate to gearboxes and pickups.
239,000 Amarok pickups (pictured right) are being recalled over fuel leaks, while 1.6 million vehicles are being recalled to swap the synthetic oil in dual-clutch transmissions with mineral oil. Now, the transmission issue is one for the global Volkswagen Group to address, not just the VW brand - vehicles from Audi, Škoda and Seat use the same seven-speed DSG and are covered under the recall, as well.
Why the switch from synthetic to mineral oil? Apparently, using the synthetic oil in a DSG and then subjecting it to stop-and-go conditions or heavy loads in a hot and humid climate can lead to electronic malfunctions, according to a Volkswagen press release. The switch, from the sounds of it, is largely a preventative measure.