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Autoblog gets ready for Le Mans with an R8 road trip and Allan McNish

This car is the master link between what Audi does on the race track and sells on the road.
We're attending the 24 Hours of Le Mans with Audi and we figured we'd make the world's biggest endurance race even more interesting by driving from Munich to Le Mans in an R8. We've also had a brief chat with Audi driver Allan McNish, and if you haven't already, check out all the multimedia ways to enjoy the next four days from the Circuit de la Sarthe, then read on.

Audi reveals even more efficient 2015 R18 E-Tron Quattro

We've seen two of this year's LMP1 manufacturer challengers – Porsche's updated 919 Hybrid and Nissan's GT-R LM Nismo. Audi has finished cooking up the successor to its Le Mans champion and unveiled the fifth-generation R18 E-Tron Quattro, even better than before. The bodywork monocoque is carried over, but the body around it has been reshaped to improve airflow from front to rear with a new hood, front fenders and wheel arches, and radiator configuration. The engine cover behind the cockpit is shrunk more closely around the engine, and there are new headlights. The hybrid system can expend double the energy per lap this year, putting Audi in the four-megajoule class under the energy-use regulations. That extra energy will come from 17-percent more capacity built into the flywheel storage system and an electric motor good for 272 horsepower. The revisions haven't increased the weight of the car, pegged to the minimum allowed at 870 kilograms. They have, however, forced changes to the TDI engine, which has to use 2.5-percent less fuel per lap to offset the increased hybrid output. The 558-hp V6 has been optimized such that it "managed to more than compensate for the loss" of fuel allowed, and Audi expects "significantly" lower lap times this year and less fuel used. We're still waiting to see what Toyota has done to its World Endurance Championship-winning racer, but we're already looking forward to this year's Le Mans. It's going to be cracking. You'll find a press release below the videos with more info on the Audi. Related Video: New Audi R18 e-tron quattro even more efficient - Aerodynamics, hybrid drive and many other details improved - Efficient TDI engine consumes even less fuel than before - Technologies from Le Mans winning cars now in production at Audi Ingolstadt, March 21, 2015 – Audi is starting the 2015 season with a thoroughly revised R18 e-tron quattro. In the FIA World Endurance Championship (WEC) and in the Le Mans 24 Hours as the season's pinnacle event, Audi is going to compete with a hybrid sports car in the 4-megajoule class. A twofold quantity of hybrid energy, fundamentally revised aerodynamics, the next step in lightweight design and a lot of detailed work characterize the fifth generation of the Audi R18. "The possibilities of the revolutionary regulations that have been in effect for LMP sports cars since 2014 are far from having been fully used.

Recharge Wrap-up: Tesla software suggestions, 'Audi at home' car sharing

Norwegian Tesla buff Bjorn Nyland wants the Tesla community to offer suggestions for the Firmware 7.1 over-the-air update. 7.0 includes a variety of small changes to the interface design, which Nyland discusses in depth in the video above. He offers constructive criticism, especially for things like the placement of certain data within the display. He calls upon other drivers to suggest their own changes and features they'd like to see in future updates. Nyland plans to tweet at Elon Musk once there are enough comments with hopes that Tesla will take the community's suggestions into consideration. See the video above, and read more at Teslarati. A survey of NRG eVgo stations found that drivers use DC fast charging over Level 2 charging by a ratio of 12 to 1. While businesses might prefer to install a Level 2 charger because it is cheaper and could help convince the customer to linger longer while they wait for a charge, this study suggests that DC charging could actually be a better way to attract customers. But the question is how to make DC charging sustainable for businesses with regard to the costs. Read more at Green Car Reports. Audi is launching its vehicle sharing program at luxury residences in San Francisco and Miami this week. Called "Audi at home," the program provides residents with a fleet of Audi vehicles at their disposal at either hourly or daily rates. The cars – the S7, S5 Cabriolet, SQ5, TT Roadster, Q7, and RS5 Cabriolet – are all of the Prestige trim level. Drivers needn't worry about mileage charges, tolls, fuel costs, insurance, or cleaning. Just reserve the car online, and drop it off at the property's valet when finished. Audi at home is launching at the Lumina luxury condos in San Francisco and at the Four Seasons Residences in Miami, with expansion to more cities planned for the future. Read more from Audi. Ballard is partnering with bus manufacturer King Long to build fuel cell buses in China. The two companies will work together to design and deploy the hydrogen-powered buses first in China, then in King Long's global network. "We are delighted to be working with the second largest bus OEM in the world on this important fuel cell bus design and market opportunity," says Ballard President and CEO Randy MacEwen. "Together, we are looking to optimize the design in order to improve performance, while lowering cost.