2011 Audi A8 L 4.2 Sedan on 2040-cars

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Why we can't have better headlights here in the U.S.

It wouldn't be a European auto show if we weren't teased with at least one mainstream vehicle we can't have here. At the Geneva Motor Show last week, the small but vocal contingent of shooting-brake buffs lamented that the Mazda6 wagon won't be coming to our shores, although they can take comfort in the fact that the vehicle won't get the torquey 250-horsepower 2.5-liter turbocharged gasoline engine we'll get here. Mercedes-Benz also announced a new headlight technology in Geneva that likely won't be available here anytime soon. It's just the latest in a long line of innovative and potentially lifesaving front-lighting solutions that the federal government doesn't allow in this country due to outdated standards — and a current lack of leadership at the U.S. Department of Transportation. Mercedes-Benz's new Digital Light system that debuted in Geneva uses a computer chip to activate more than a million micro-reflectors to better illuminate the road ahead. The Digital Light headlamps works with the vehicle's cameras, sensors and navigation mapping to adjust lighting for the given location and situation and to detect other road users. The Digital Light technology also serves as an extended head-up display of sorts by projecting symbols on the pavement ahead to alert drivers to, say, slippery conditions or pedestrians in the road. And it can even project lines on the road in a construction zone or through tight curves to show the driver the correct path. Digital Light will be available on Mercedes-Maybach vehicles later this year, although like any technology it's bound to trickle down to less expensive vehicles. That is, if we ever get it here in the U.S. Audi, a leader in automotive lighting, has repeatedly run into snags trying to bring state-of-the-art car headlights to the U.S. The German luxury automaker's recently introduced matrix laser headlight system, which performs many of the same trick as Mercedes-Benz's Digital Light, also isn't legal on U.S. roads. And five years after the introduction of its matrix-beam LED lighting, which illuminates more of the road without blinding oncoming motorists with brights by simultaneously operating high and low beams, Audi still can't bring that technology to the U.S. either.

2016 Audi TTS Quick Spin

So, this is awkward. Last week, you (hopefully) read my Quick Spin on the Mercedes-Benz C450 AMG, a vehicle that I argued was dynamically very good, but wasn't so much better than the standard C300 to make it a worthwhile buy. Now I'm going to voice a similar opinion. The Audi TT has always been a vehicle you bought for the style, rather than the performance. If you wanted an athletic two-seat German, you just bought a Porsche Boxster. But the TT, that's a car you bought for the way it looks. And the way it looks remains the strongest argument against the car you see here, the TTS. In short, it's quick, agile, and more aggressive looking, but none of those qualities are so dramatically better than the plain-jane TT. Another Autoblogger came to this conclusion while tracking the new TTS – now I'll explain where this car misses the bull's eye on the road. Driving Notes Audi will probably never match the design impact of the original 1998 TT, but the third-gen feels like a more mature, cohesive evolution of the handsome second-generation car. The front and rear fascias are sharper, more muscular, the headlights/taillights chiseled and emotive, and the front grille significantly more powerful. Even in the subdued Daytona Gray shown here, this is a car that can get people staring almost as easily as that original model. The interior of the third-generation TT is as much a design triumph as the first TT's exterior. It's a master class in clean, simple, elegant design, but it's also extremely disorienting. Buttons for the HVAC system are hidden on the vents themselves and not having a central display of any kind is jarring. Once you get used to the layout and embrace the absolutely exceptional Virtual Cockpit – seriously, I'm convinced this is the finest piece of in-car technology on the market – the cockpit layout just starts making sense. This is a compact cabin, but it's a wonderful place to spend time. In addition to Virtual Cockpit, the S Sport seats (optional on the standard TT) are supportive and perfectly snug. Even for the big boned, the flat-bottomed steering wheel is a delight. The material quality is high across the board. Perhaps the biggest complaint is the charitably named backseats. Audi should just go with an R8-style shelf back here – those tiny buckets aren't fooling anyone. It'd make for a more versatile interior. Audi's current TT engine line is restricted to 2.0-liter, turbocharged four-cylinders.

Audi is working on a suspension that gets power from bumpy roads

Regenerative brakes aren't new. They're on virtually every hybrid and EV, and they're even starting to pop up on traditional gas-powered cars, like with the i-ELOOP-equipped Mazda6. But even with these systems, cars can get more efficient, and Audi thinks it found yet another source of wasted energy. The source? The suspension. The idea is to turn the kinetic energy that goes into the dampers into usable energy instead of as waste heat. Audi isn't the first auto company to come up with regenerative suspension – nearly three years ago, ZF introduced its GenShock technology, which used a valve attached to traditional, oil-filled hydraulic shocks to recapture kinetic energy from movement caused by bumps in the road. Audi's prototype technology, which it calls eROT, replaces traditional dampers with horizontally oriented electromechanical rotary dampers. eROT is apparently short for electromechanical rotary damper. Neat. In testing, eROT recovered an average of 100 to 150 watts on a typical German road, three watts from a fresh piece of pavement, and 613 watts on a rough stretch of tarmac (wattage is calculated as power over time, so this is actually the rate at which the system harvests energy). The dampers channel that energy to a tiny, 0.5-kWh, 48-volt battery. The prototype is claimed to cut CO2 emissions by three grams per kilometer (4.8 grams per mile), while the company believes a future production version could save up to 0.7 liters of fuel per 100 kilometers of driving. Converting the savings to American miles per gallon isn't easy, so we'll use a practical example. In the US, the Q7's supercharged 3.0-liter V6 returns a combined rating of 21 miles per gallon, which works out to 11.2 liters per 100 kilometers. Apply eROT's 0.7L/100km savings, and the Q7's economy would improve to 10.5L/100km, or 22.4 mpg, a 1.4-mpg improvement. That's not huge, but because math, 0.7L/100km is more dramatic on a more fuel efficient vehicle – taking an A3's 27-mpg combined rating and adding eROT would drive efficiency up 2.4 mpg, for example. There are a few other big benefits beyond fuel and emissions savings – Audi claims eROT provides a more comfortable ride than traditional active suspensions, because engineers can tune the compression and rebound strokes independently of each other. Beyond that, the horizontally oriented rear suspension geometry means more cargo space, since the dampers don't poke up into the cabin like they normally do.