2004 Jaguar Xjr Base Sedan 4-door 4.2l 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:

Is the Jaguar XFR-S really worth $17k more than the XFR? [w/poll]

Adding performance to a car is rarely cheap - whether you're looking to do it yourself or rely on the factory to do it for you. In the case of the new Jaguar XFR-S, the cost differential over an already-impressive (and somewhat expensive) XFR is a stout $16,800. Auto Express recently got a hold of both cars to see whether that price pays off on the track.
For that price, Jaguar gives the XFR-S an extra 40 horsepower and 41 pound-feet of torque - for a total of 550 hp and 502 lb-ft - to go with a stiffer suspension, beefed-up differential and, of course, meaner styling. We don't want to ruin the results of the AE video, but right off the bat, the host says that you can feel the extra power of the XFR-S, but that it's not a "night-and-day difference."
Scroll down to see what happens when two high-powered Jags go head-to-head on a track. And then be sure to let us know whether or not you think the added money is worth it for the XFR-S in the completely informal poll below.

Jaguar working on windows that open when you touch them

Jaguar is working on side windows that will whir up and down not with a push of a button, but with a touch of the glass itself. According to Jaguar Design Director Ian Callum, "For instance, if you want to pull the windows down, you touch a certain area of the glass and you can actually just drop them down." Callum would go on to caution, "These things are all a work in progress at the moment," before pausing and saying, "That's coming." When we asked when we might see such technology deployed in a production car, Callum, who spoke with Autoblog at the Detroit Auto Show on Monday, said, "I don't know when, but we certainly know how to do it." Callum was less forthcoming about how the technology functions, saying, "Oh, I can't tell you (laughs)... it's proximity, mainly." It's not clear whether traditional physical switches mounted on the doors would still be required with such a system. The designer then went on to discuss Jaguar's innovation in proximity-based switchgear – the automaker has already been using the technology for its interior overhead lighting controls and glovebox release. When we asked about any safety concerns that touch-control windows might generate, Callum said, "I think if it's a very specific area, there's absolutely no ambiguity about what you're trying to do – it's fine." Callum knows a thing or two about the need for absolute specificity in this area – when Jaguar introduced its XF sedan with proximity switchgear, it found passengers were accidentally opening their gloveboxes with their knees, which prompted a quick redesign. "It's a whole new genre of disciplines that we have to think about – what is safe," he said. Design/Style Jaguar Technology Luxury 2015 Detroit Auto Show