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Audi RS6 Avant and Mercedes-AMG E63 S drag race for Top Gear

Sometimes the kids are late for school, and you need a wagon to get them there in a hurry. In its latest drag race, Top Gear finds out which is the quicker high-performance family hauler: the Audi RS6 Avant or the Mercedes-AMG E63 S. The specs suggest this race should be quite close at the finish line. The RS6 has a 4.0-liter twin-turbo V8 with 552 horsepower, but the E63 S is a little more powerful with 577 hp from a 5.5-liter twin-turbo V8. However, the Audi has a traction advantage from the all-wheel drive system, whereas the Mercedes only spins its rear wheels. Pick your favorite, and then watch the video to see if the similar numbers translate to a photo finish in the real world. Related Video:

Stanford goes from Pikes Peak to Thunderhill with autonomous Audi TTS

In the years since Stanford University engineers successfully programmed an Audi TTS to autonomously ascend Pikes Peak, the technology behind driverless cars has progressed leaps and bounds. Back then the Audi needed 27 minutes to make it up the 12.42-mile course – about 10 minutes slower than a human driver. These days, further improvements allow the vehicle to lap a track faster than a human. The researchers recently took their autonomous TTS named Shelley to the undulating Thunderhill Raceway Park, and let it go on track without anyone inside. The Audi reportedly hit over 120 miles per hour, and according to The Telegraph, the circuit's CEO, who's also an amateur racing driver, took some laps as well and was 0.4 seconds slower than the computer. To make these massive technological advancements, the Stanford engineers have been studying how racers handle a car. They also hooked up drivers' brains to electrodes and found the mind wasn't doing as much cognitively as expected. It instead operated largely on muscle memory. "So by looking at race car drivers we are actually looking at the same mathematical problem that we use for safety on the highways. We've got the point of being fairly comparable to an expert driver in terms of our ability to drive around the track," Professor Chris Gerdes, director of Stanford's Revs Program, said to The Telegraph. With progress coming so rapidly, it seems possible for autonomous racecars to best even elite drivers at some point in the near future. Related Video:

Volkswagen pushed back against Takata airbag recall

Volkswagen and Audi will recall about 850,000 vehicles in the US to replace their Takata-supplied driver side airbag inflators, but the automaker doesn't believe the safety campaign is entirely necessary. In a letter to the National Highway Traffic Safety Administration, the company pushes the agency to re-evaluate the recall's scope because the parts are allegedly safe, it claims. VW asserted in the letter, which NHTSA posted online (as a PDF) with other documents about the company's safety campaign, that the vast majority of the automaker's recalled vehicles used Takata inflators from the supplier's factory in Freiburg, Germany. Only the US-built Passat had components from Takata's plant in Mexico. VW's argues to NHTSA that its recall is unnecessary because there are no reported airbag ruptures in the German-made parts, and the plant has better quality control than Takata's factories in the US and Mexico. In addition, the Mexico-manufactured components in the Passat are also allegedly safe because they come from a time after significant upgrades to the plant to address humidity and welding concerns. "We do not believe the facts known to date support the scope as defined in the Takata defect notification," VW's letter says. To be clear, VW is not refusing the Takata recall and plans to fix the affected vehicles. Instead, this letter shows the automaker expressing an opinion that NHTSA's scope for the campaign is too broad. VW now plans to do its own analysis on the inflators to strengthen that case, according to The Detroit News. "We respectfully request that, should such results be shown, the agency work with Volkswagen and other manufacturers to revisit the scope of these recalls," the letter said. Takata's recalled inflators use ammonium nitrate as a propellant, and experts believe that long-term exposure to high humidity can make the chemical more likely to cause a rupture during airbag deployment. The spray of metal shrapnel from the exploding parts has links to at least 10 deaths. Related Video: