2013 Jaguar Xj Portfolio Awd 4dr Sedan on 2040-cars

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Watch new Jaguar XF perform a literal high-wire act

Coming out with a new luxury sedan can be a truly daunting prospect. Make it too edgy and you'll risk disenfranchising what can often be a rather conservative customer base. Make it too conservative and you may fail to attract enough new customers or generate enough interest to make the endeavor worthwhile. Whether Jaguar succeeded in walking that thin line with the new XF is a matter of personal taste, blending as it does elements from the smaller XE and the outgoing XF it replaces. But in launching the new model, Jaguar didn't just pull of a figurative high-wire act – it did quite a literal one. To drum up support for its newest debut, Jaguar undertook the stunt depicted in the video above, stringing a pair of carbon-fiber cables some 60 feet above the River Thames in London. With some guide wires and counterbalance weights to keep it all in check, and a motion-picture stunt crew orchestrating it all, the new XF drove over 780 feet from one bank of the river to the other, setting a new world record in the process. Instead of thinking too hard about the whys (seriously, though... why?) and hows, we suggest you just watch the video above. Related Video:

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.

Jaguar Land Rover tech tracks brainwaves, heart, lungs

Jaguar Land Rover has been on a bit of a tech kick lately, and its latest is called Mind Sense, which uses biometric sensors to monitor and enhance the driver's level of alertness. Jaguar is installing brainwave sensors adapted from NASA into the steering wheel of an XJ sedan, along with medical-grade heart and respiratory sensors in the seat. Together, the sensors would determine if the driver is focused on the road, dozing off, merely thinking about something else, or if the driver's stress level suddenly peaks. The system would enable the vehicle to better prepare for an emergency, or for a future autonomous vehicle to hand off control to a better-prepared driver where needed. At the same time, JLR is also working on an enhanced infotainment system designed to reduce the amount of time the driver's hands are off the wheel and their eyes are off the road. The system determines which control they're reaching for on the display and engages it while their finger is still in mid-air, deploying an ultrasonic pulse to provide artificial haptic feedback without actually having to touch anything. Finally, a new haptic accelerator pedal is under development that could alert the driver to respond to an impending situation without overloading the senses with chimes and beeps. These latest developments follow the demonstration of a remote-control system installed on a Range Rover Sport, and follow in a long line of new technologies under development by the British automaker. JAGUAR LAND ROVER ROAD SAFETY RESEARCH INCLUDES BRAIN WAVE MONITORING TO IMPROVE DRIVER CONCENTRATION AND REDUCE ACCIDENTS - Jaguar Land Rover's pioneering Mind Sense project is researching measuring brainwaves to monitor driver concentration in the car - Researchers are developing a Wellness Seat in a Jaguar XJ which analyses the driver's heart rate and breathing to monitor driver health and stress - Touchscreens that predict which button you want to press as the user's fingers are in mid-air - to minimise time spent with eyes off the road - Jaguar Land Rover researchers use new haptic accelerator pedal to communicate hazards to the driver Whitley, UK: Jaguar Land Rover has revealed a range of new road safety technology research projects that are being developed to reduce the number of accidents caused by drivers who are stressed, distracted and not concentrating on the road ahead.