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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and potentially lifesaving front-lighting solutions that the federal government doesn't allow in this country due to outdated standards — and a current lack of leadership at the U.S. Department of Transportation.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.

GM pauses 3.0-liter turbodiesel production due to a supplier shortage

General Motors confirmed it has temporarily stopped taking orders for trucks and SUVs equipped with the 3.0-liter Duramax turbodiesel six-cylinder engine. It blamed the last-minute pause on a supplier-related shortage. Website TFL Truck first reported the news, and a representative from General Motors quickly confirmed it. The spokesperson explained the issue is due to a "temporary part shortage" and added that production will resume "as soon as possible," meaning the Duramax engine (which is called LM2 internally) is not going away permanently. Additional details are not available, so we don't know if the issue is related to the ongoing chip shortage. Rather than delay deliveries and create a backlog, General Motors is reportedly asking its dealers to encourage buyers who want a turbodiesel engine to instead select either the 5.3-liter V8 or the 6.2-liter V8, depending on the model selected. Both are gasoline-powered units. There's no word yet on when Duramax production will resume. The shortage affects several models, including Chevrolet's Tahoe, Suburban, and Silverado 1500 and GMC's variants of these trucks. Cadillac's Escalade is temporarily diesel-less as well. Heavy Duty variants of the Silverado and the Sierra are not affected because they're powered by a different Duramax engine with eight cylinders. Motorists seeking a full-size SUV powered by an efficient turbodiesel engine are temporarily out of options because the Tahoe/Yukon and the Suburban/Yukon XL had the segment to themselves. The Duramax was surprisingly popular, too: in May 2021, GM Authority reported that the turbodiesel straight-six represented 8% of Suburban sales and 6% of Tahoe sales. Installed in a rear-wheel-drive Tahoe, the engine returns 21 mpg in the city, 28 mpg on the highway, and 24 mpg in a combined cycle, figures that make the body-on-frame behemoth more efficient than the unibody, front-wheel-drive Chevrolet Blazer that's 20 inches shorter and approximately 1,700 pounds lighter. Related video: 2021 Chevrolet Tahoe 3.0L Duramax engine

Here is the Cadillac XT6 three-row SUV's interior

The Cadillac XT6 has once again been spotted by one of our spy photographers. Though the outside is still as buttoned-up as ever, our photographer managed to get close enough to see the completely uncovered interior. On the surface it looks more like the interior of the CT6 than the latest Cadillac model, the XT4, which is rather surprising. Specifically, the dashboard layout is nearly identical to the CT6's. It's a wide, sweeping dash, and the mid-section is dominated by a broad piece of trim that appears to be carbon fiber in this model. It likely can be replaced by wood, leather or a variety of other trims. The top part of the center stack is dominated by a large touchscreen with touch buttons surrounding it for driver's aids. Directly underneath are subdued air vents followed by the climate controls. These controls appear to have been lifted straight from the CT6 and feature touch buttons and a trio of toggle switches. The few places the dashboard deviates from the CT6 include how the XT6's fancy trim spans the full width of the dash, rather than giving way to some plain leather on the driver's side. This gives the whole dash a more upscale look. The dash also doesn't try to smash too many different materials and textures into one design. Overall, it all looks attractive enough, though we're a little disappointed to see a lack of physical buttons as we saw in the XT4. That being said, there are XT4-inspired elements in the XT6's interior. Most prominent is the scroll wheel down in the center console. We suspect the infotainment system will be effectively identical, so the wheel will similarly serve as a redundant means of controlling the infotainment system along with the touchscreen, voice commands and wheel controls. The shifter also seems to be the same as the XT4's. The XT6 exterior doesn't really reveal anything new. It still looks angular, and it still looks long enough to have a third row of seats. The introduction of this model will certainly give Cadillac a much more rounded lineup of crossovers from small to large, something the brand sorely needs. Related Video: