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BMW makes the M4 extra special with a huge wing

BMW has all of the bases covered in its lineup, especially when it comes to its 4 Series models. Don't like going to the track? There's the BMW 430i and 440i, which are available as a coupe and gran coupe. Drivers looking for a track-friendly car that can also be used on the road will be steered toward the M4. BMW even built the hardcore M4 GTS for drivers that spend all of their time on a track. Now, it looks like BMW is trying to bridge the gap between the M4 and the M4 GTS with a special-edition model. Our photographers caught BMW testing an M4 with some extreme aerodynamic components around the Nurburgring. With its aggressive front end, massive wing, and sporty rear diffuser, the prototype M4 appears to be similar to the special-edition M4 Competition Sport that BMW released in Spain. The Spain-only special edition was marketed as a softer version of the M4 GTS with less power and usable rear seats. With a similar look and visible rear seats, this prototype indicates a similar track-focused special edition model. Since the M4 is only a few years old, it's unlikely that BMW is testing a new model, but the automaker could be testing aerodynamic components for a refreshed model down the road. A cheaper, more usable M4 GTS, though, would be the perfect car to round out BMW's current lineup. Related Video:

Prototype Bentley Continental GT bears EXP10-style taillights

The latest Bentley Continental GT our spy photographer has caught happens to be in an unusual blue hue, breaking with the convention of black painted prototypes. It still features clever camouflage, including faux light covers. We already knew that the traditional quad lamps were hidden underneath, but it turns out that the true shape of the taillights were also obscured. Rather than an evolution of the current units, the new taillights seem to be slim, partial oval units similar to those on the EXP10 Speed 6 concept. We can finally see this shape since the lights are illuminated in two of the photos. Aside from the taillights, there are a couple other details that have been revealed. The car's retractable rear spoiler is seen in action. There also seem to be faux body panels covering the front and rear fenders. Upon very close inspection, you can see some odd lumpy portions in these areas that don't follow the lines of the car, and nearby are some faint seams. We can infer that the actual height of the front and rear fenders will be a bit lower and more understated than they appear in these photos. Previous spy photos have shown that there is a convertible version in the works that will likely be released around the same time as, or soon after, the coupe. The car will use the Panamera platform, and it will likely be offered with 8- and 12-cylinder engines, as it is now. Related Video:

Bentley installing 10,000 solar panels in HQ parking lot

Bentley has started construction on what it says will be the U.K.'s largest solar-powered car port at its factory headquarters in Crewe, England. When completed, the array will have a capacity of 2.7 megawatts, enough to cover 24 percent of the company's energy requirements on the site. Crews will install 10,000 solar panels in the employee car port in a project that's expected to take six months. They'll add to the 20,815-panel, 5mW rooftop solar power system that Bentley finished installing at the factory in 2013. The combined output will be enough to power the equivalent of 1,750 homes. The car port will cover 1,378 parking spaces and be installed and operated by British firm FlexiSolar, which is also designing and manufacturing the system. The new green energy system adds to plaudits in recent years for reducing its water usage at the Crewe HQ. Bentley has also been awarded the Carbon Trust Standards for carbon, water and waste. While Bentleys aren't exactly known for their fuel efficiency — the Mulsanne sedan gets a woeful 11 mpg in the city and 18 mpg on the highway — its vehicles no longer appear on the American Council for an Energy-Efficient Economy's "meanest" list of gas-guzzlers, as they once did. It also just showed its forthcoming and long-promised Bentayga plug-in hybrid in Geneva, promising 31 miles of all-electric range and a turbocharged 3.0-liter V6 paired with an electric motor. The brand is also promising a full-electric model in the near future. "We continue to focus on new initiatives that reinforce our commitment to the environment, whether this is introducing alternative powertrain technologies in future models, or our award-winning work to reduce the environmental impact of our factory," Peter Bosch, Bentley's member of the Board for Manufacturing, said in a statement. Related Video: