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Weekly Recap: Automakers rethink the definition of luxury

Variety is the spice of life, but it's becoming a prerequisite for luxury carmakers in the ultra-competitive US market. The Detroit Auto Show was strong evidence of this reality. It's not enough to offer attractive and well-appointed cars and SUVs anymore. Luxury brands that want to be competitive need to invest in everything from high-powered supercars to clever hybrids. To be relevant, you need to be green and mean – and everything in between. As General Motors product chief Mark Reuss said after the reveal of the 640-horsepower Cadillac CTS-V: "We are not leaving anything on the table." He was speaking for Cadillac, but he might as well have been speaking for the luxury car market. The CTS-V debuted in Detroit about an hour after Lexus surprised showgoers with the reveal of the RC F GT3 race car and then announced ambitious plans to return to competitive racing. That almost overshadowed the fact Lexus had just revealed another potent addition to its growing F line, the 467-hp GS F. View 20 Photos But for luxury brands, it's not just about maximum horsepower for well-heeled enthusiasts or decadent amenities for the Grey Poupon set. Strong competition from all corners has forced automakers to refine and expand their lineups in ways unforeseen even a few years ago. Case in point: Mercedes-Benz finally has an answer to the BMW X6, rolling out the GLE coupe in Detroit. The X6, which blends coupe-like styling cues with some of the functionality of an SUV, debuted in 2008. Back then it was a punchline, but seven years and more than 260,000 sales later, the X6's success has compelled Benz to respond. Mercedes – one of the strongest proponents of diesel technology – also debuted the C350 plug-in hybrid sedan, which promises a range of 20 miles on electricity, though fuel economy figures were not announced. The car pairs Mercedes' well-received 208-hp turbocharged four-cylinder with an electric motor for total output of 275 hp and 443 pound-feet of torque. Meanwhile, Infiniti will add the Q30 hatchback to its lineup by the end of the year, new president Roland Kruger reiterated in Detroit. It's expected to be joined by a crossover variant, and the additions will help strengthen Infiniti in the United States and abroad. "While we're expanding our product line, we're also expanding our market reach," he said. That's something echoed by Jaguar executives, who are preparing to launch the brand's first crossover, the F-Pace, in 2016.

2021 Cadillac XT5 Review | What's new, prices, fuel economy, pictures

The 2021 Cadillac XT5 plays in what’s become the most popular of all luxury segments: two-row crossovers. It does so with typical Cadillac nebulousness, straddling the line between size segments with the promise of getting more for your money than what the Germans might offer. And while it is cheaper than much of the midsized competition, you lose out in other areas. Style is always subjective, but inside and out, we find most of its competitors from Germany and elsewhere more compelling. The blacked-out Sport trim adds a bit of pizazz, but nothing about the design is memorable. WeÂ’re less than enamored with the powertrain options, too. The base four-cylinder is refined but less powerful than what competitors offer, while the V6 is hardly much of a performance upgrade and is shared with multiple non-luxury GM vehicles to boot. Some of the available tech is enticing at this price point, but an uninspired interior and lackluster drive experience would have us recommending many of the XT5Â’s rivals over it, regardless of which segment they belong. WhatÂ’s new for 2021? The XT5 sees minor updates for 2021. It gains wireless Apple CarPlay and wireless Android Auto functionality. Dark Moon Blue Metallic and Infrared Tintcoat are added to the exterior color options. Finally, new 20-inch dark-painted wheels are added as optional on Sport models. Cadillac gave the XT5 a mid-cycle refresh last year, and you can find those 2020 changes here. 2021 Cadillac XT5 Sport View 21 Photos What are the XT5 interior and in-car technology like? Similar to the exterior design, the interior is rather forgettable. ItÂ’s covered in leatherette most places you look and touch (though much of it can be swapped to genuine leather with the Platinum Package). The styling comes off as old and uninspired (and has since this generation was brand new). ThereÂ’s a mix of the typical GM corporate plastic and Cadillac-specific glossy bits, but the ratio doesnÂ’t seem right. And then thereÂ’s a splash of metal tossed in for the climate controls that are frustratingly slow to respond. Done up in the right color upholstery (available on upper trims), thereÂ’s a touch of intrigue with the extensive use of leather-look or real leather facing the occupants.

Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video: