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Spy photos of the upcoming Buick Regal wagon, via the Opel Insignia

We're pretty sure Buick is working on a Regal wagon. And because the Regal is the Opel Insignia on the other side of the pond, these spy photos show us what's in store when it eventually turns into a Buick. The rakish wagon was lightly camouflaged, giving us our best look at the upcoming vehicle. The wagon shares a lot of the same design cues as the Insignia sedan that we spotted earlier. The bottom of the front end is covered in heavy camouflage, masking the wagon's grille. It's unsure to tell whether the black nostril-like pieces sitting above the grille are vents or just tape. The prototype still shares the same upright nose as the model we spotted earlier, giving the wagon a wider stance than its predecessor. The side profile of the wagon is sleeker, thanks to the extra four inches between the axles, than the current model is, with the design mimicking that of a shooting brake instead of a traditional wagon. The rear end of the wagon is also more upright with the taillights and bottom part of the fender jutting out beyond the glass. The boxy design sitting atop of the rear end doesn't match the rest of the vehicle and appears to be a part of the car's camouflage. With the tunnel-like design at the top gone, the rear end would have a more streamlined design. With the next Regal expected to continue on as a rebadged Insignia, the likelihood of a Regal Wagon in the US look good, but aren't set in stone. Late last year, Buick filed two trademarks for "Tourx" and "Regal Tourx," pointing towards a high-riding wagon with all-wheel drive. Imagine these spy shots with a taller suspension and some crossover-inspired trim pieces and you have a wagon that could take on the likes of the Subaru Outback and Audi Allroad. Related Video: Featured Gallery 2018 Opel Insignia Grand Sport Tourer Spy Shots View 10 Photos Image Credit: CarPix Design/Style Spy Photos Buick GM Opel Wagon Luxury opel insignia

Automakers' sound systems: Crank it, don't yank it

Years ago, one of the first things most music lovers did after buying a new vehicle was drive to an aftermarket stereo shop to get the crappy stock components swapped for better gear. And you'd typically get not only better sound but also more bang (and boom) for your buck. But in the past decade or so, the overall quality of OEM audio has dramatically increased, while car electronics became more complex, removing the incentive for most new vehicle owners — and all but the most hardcore DIYer — to start from scratch. In 2010, I did a comparison of the average costs for OEM electronics vs. similar offerings from the aftermarket, and back then automakers' stock premium systems were by far the best bargain — and are probably an even better value now. The premium 14-speaker, 1,200-watt JBL system in the all-new 2019 Toyota Avalon is a prime example of this trend. It's standard on the top two Limited and Touring trims and is available as a $680 audio upgrade on the XLE and XSE. I doubt you can even buy 14 speakers and 1,200 watts of amplification from the aftermarket for 700 bucks, much less have it all installed. And because the system is bundled with Toyota's Entune infotainment system, Apple CarPlay and a surround-view camera, removing the head unit means you would likely lose these features. Another advantage of OEMs and their audio partners is they can design the car around the audio system. In the past, automakers would typically place speakers where convenient for packaging, not for optimal sound reproduction, and audio engineers were forced to compromise. But as with the Avalon's premium JBL audio system, this is starting to change. At a recent behind-the-scenes peek for media into the process of developing the system, Toyota and Harman engineers delved into the minutia of sealing the inner panel of the front doors to create an enclosure for 6x8-inch woofers, making space in the pillars for JBL horn tweeters and extensively measuring the acoustic properties of the interior to tune the sound to the space. I'm met some creative and skilled car stereo installers, but none with a degree in psychoacoustics. The system is also the first to feature Quantum Logic Surround that creates a multi-channel listening experience from two-channel sources. And it includes Harman's Clari-Fi processing that "rebuilds key details lost" in compressed audio formats used by streaming music services and MP3s.

Buick mulling more powerful Encore; diesel too

Looking to set itself apart in the mid-luxury segment, Buick is looking to introduce a diesel engine somewhere in its US lineup. And according to Edmunds, the two best chances of a diesel Buick rest with the Encore and Verano.
In both our First Drive and Review of the 2013 Encore, our chief complaint about the compact crossover was the the lack of power from the 138-horsepower turbo engine. Edmunds says that the recently introduced 1.6-liter four-cylinder engine (with both gas and diesel variants) from the Encore's overseas cousin, the Opel Mokka, could make its way into the Encore delivering the much-needed boost in power.
Then there's the Verano. As a close relative to the Chevy Cruze, which just added a diesel engine for 2014, the article speculates that a Verano Diesel might actually be the more "probably candidate" if and when Buick decides to add a diesel model to its portfolio. Either way, offering such an engine in one of its products could be a great way for Buick to differentiate itself from Cadillac and possibly even attract buyers from Volkswagen, Audi and Mercedes-Benz looking for a luxurious, fuel-efficient vehicle.