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Tom Kristensen walks through a perfect lap of Le Mans in Forza 5

One of the best ways of learning a new track, aside from driving it, is to hear someone that's intimately familiar with it give you a good walkthrough. That's just what you'll get here, as the winningest driver in 24 Hours of Le Mans history, Tom Kristensen, walks you through the Circuit de la Sarthe's high-speed, 8.5-mile strip of pavement.
Kristensen is dubbed over scenes of drivers from a Forza Motorsport 5 contest lapping the track at the wheel of an Audi R18 E-Tron Quattro, adding a bit of visual sense to the Danish drivers description of the track.
With the 2014 24 Hours of Le Mans kicking off this weekend, this is just the sort of video you'll want to watch to get you in the mood. Take a look below, and then let us know what you think in Comments.

Audi on Demand pilot program launches in San Francisco

Customers eager to drive a new Audi but unwilling or unable to plunk down the purchase price for one will be intrigued by the launch of the new Audi on Demand program. Initially being rolled out in San Francisco, Audi on Demand is based around an iPhone app that allows clients to order up a new Audi of their choosing on a day-by-day basis for up to 28 days in a row. Order an Audi through the app and a "personal concierge" will deliver the car anywhere in the city – curbside, driveway, parking lot, office building... pretty much anywhere the customer chooses. The concierge will even help set up the audio and navigation systems to the customer's preferences. And if the customer isn't there to receive the vehicle in person, he or she can simply unlock it through the app, start it up and drive off. The service is being made available on a broad range of Audi models, from the A4 all the way up to the R8. Customers can even specify a child seat or (on an Allroad or Q5) a ski or bike rack, and are guaranteed that the vehicle they select will be the one they get, right down to the color and trim. Though being launched at first only in San Francisco, Audi says it will roll out the program in other American cities "in the coming years." In announcing the program, Audi also revealed that it's planning to launch Audi at Home as well, a "micro-sharing" service that will allow residents of select condo complexes to share a fleet of Audis as well. These, of course, are just the latest smartphone-enabled conveniences being introduced by the German automaker, following its collaboration with Amazon and DHL for in-trunk delivery. Related Video: Audi launches innovative mobility program: Audi on demand April 27, 2015 | SAN FRANCISCO, California - Audi on demand launches beta program in San Francisco - Innovative premium service allows customers to choose their preferred Audi model via iPhone app - Personal concierge delivers vehicle to a San Francisco location of customer's choosing Audi today introduced Audi on demand, an innovative mobility program that gives customers a new way to experience the Audi brand and its range of vehicles at the touch of a button. With Audi on demand, customers can reserve an Audi by the day for up to 28 days. The premium service is currently available in San Francisco as part of a beta program and will be rolled out across additional U.S. cities in the coming years.

Audi builds 5-millionth vehicle with Quattro

Quattro, the trademark name Audi has put on its all-wheel-drive system engineered for passenger vehicles, recently celebrated its five-millionth installation. The driveline has been offered in more than 140 different vehicles since its introduction more than three decades ago.
The all-wheel-drive technology made its world debut at the 1980 International Geneva Motor Show, beneath the floorpan of the Quattro Coupé, a low-volume two-door. It didn't take consumers long to embrace Audi's innovative approach. While most four-wheel-drive systems at that time utilized heavy transfer cases or second cardan shafts, Quattro was virtually tension-free, light, compact and efficient. Most importantly, enthusiasts found it was especially suitable for sports cars.
Today, the automaker offers Quattro on its full line of passenger vehicles and it is unquestionably successful (the technology enjoyed a 43 percent take rate in 2012). On models with transverse-mounted engines (A3 and TT), Audi uses an electronically controlled multi-plate clutch with hydraulic actuator. Under normal conditions, the clutch sends power almost exclusively to the front wheels (if wheel slippage occurs, up to 100 percent of the torque may be sent to the rear). Vehicles with transverse-mounted engines (A4, A5, Q5, etc...) use a self-locking center differential sending 40 percent of the engine torque to the front axle and 60 percent to the rear under normal conditions (it is able to send the majority of the power to the axle with better traction when needed). The highest-performing Quattro systems use torque vectoring to further improve cornering grip and speeds.