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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.

Hondata's 2019 Acura RDX tune brings the mid-range torque

One of the big advantages to the era of turbo Hondas is that there's plenty of horsepower and torque left on the table for tuners to take advantage of. One of those companies is Hondata, and following its upgrades for the Civic and Accord, it's now tuning the Acura RDX luxury crossover. The RDX uses a turbocharged 2.0-liter engine similar to those in the Accord and the Civic Type R. In stock form, it makes 272 horsepower and 280 pound-feet of torque. With Hondata's Stage 1 tune, the company says that horsepower increases by about 10 across the rev band. Looking at the dyno graph, it also appears that peak horsepower increases by about 5 horsepower, and peak torque is up by about 15 pound-feet. Peak torque also appears to arrive sooner, and most of the torque curve seems to be up by 10 to 15 pound-feet. The increases in power and torque are available in all four of the RDX's drive modes. The Stage 2 tune increases power torque even more in Sport and Sport+ modes, and keeps Snow and Comfort modes at Stage 1 settings. Peak horsepower looks to be up about 10 over stock, but the mid-range sees as much as a 28-hp increase. Peak torque sees a huge jump of about 45 lb-ft over stock based on the dyno chart, and it's available even lower than the Stage 1's peak torque. If this all sounds good to you, you can order up a Hondata FlashPro computer for your RDX right now. It costs $695 and comes with the handheld computer for uploading or removing tunes. RDX owners in California should note that neither tune is currently CARB legal. Related Video:

Acura recalls 106K MDX models for AC system bolt

The National Highway Traffic Safety Administration is announcing a recall covering the air conditioning system on 106,439 units of the 2014-2015 Acura MDX. The affected examples have production dates between April 23, 2013, and December 16, 2014. While the problem doesn't create a major safety concern, it could be very annoying when driving during the intense heat of the summer months. On these luxury crossovers, the bolts on the air conditioning compressor clutch drive might not have the proper anti-corrosion coating. This makes it more likely for them to eventually break, and if that happens the AC pulley could fall off the CUVs. Acura reports no injuries or crashes form the issue, and the company discovered the issue through warranty claims for the air conditioning not working. To repair the problem, dealers will replace the bolts. They'll also inspect the AC clutch plate and will replace it if necessary, as well. The repairs for some owners should already be in progress, according to NHTSA. Related Video: RECALL Subject : A/C Compressor Clutch Drive Bolts may Corrode Report Receipt Date: JUL 01, 2015 NHTSA Campaign Number: 15V417000 Component(s): EQUIPMENT Potential Number of Units Affected: 106,439 All Products Associated with this Recall Vehicle Make Model Model Year(s) ACURA MDX 2014-2015 Details Manufacturer: Honda (American Honda Motor Co.) SUMMARY: Honda (American Honda Motor Co.) is recalling certain model year 2014-2015 Acura MDX and MDX AWD vehicles manufactured April 23,2013, to December 16, 2014. The affected vehicles have air conditioning compressor clutch drive bolts that may not have received the proper anti-corrosion coating. CONSEQUENCE: If a bolt was not coated, it may corrode and break as a result. If the bolt breaks, the compressor clutch plate may separate from the vehicle, possibly becoming a road hazard. REMEDY: Honda will notify owners, and dealers will replace the air conditioning compressor clutch drive bolt and install a new clutch plate if necessary, free of charge. The recall is expected to begin July 31, 2015. Owners may contact Acura client relations at 1-800-382-2238. Honda's number for this recall is JQ7. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov. Statement by Acura Regarding Air Conditioner Clutch Drive Bolt Recall: 2014-2015 Acura MDX Jun 25, 2015 - TORRANCE, Calif.