1997 Polaris Sportsman 500 Dash Indicator Lights Light on 2040-parts.com

One Lap of the Web: Mercedes-Benz SLC rendered, Google Glass for the Tesla S and a rusty Datsun 280ZX

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- Last month we brought you some intriguing spy photos of a Porsche 911-fighting Mercedes-Benz coupe -- possibly to be called the SLC, or even the next SLS AMG (it's all a bit unclear at this point) -- but layers of camouflage made it a bit tough to see what the car will look like.

GM to double size of battery lab

General Motors says it will spend $8 million to double the size of its Global Battery Systems Lab, which the company claims is the largest and most technologically advanced automotive battery lab in the United States. GM says the expansion will speed up the development of hybrid and electric vehicles, such as the upcoming Chevrolet Volt, by improving on-site testing of battery cells and systems. When finished, the lab will be 30,000 square feet bigger than it is now, for a 63,000-square-foot total.

The experts' review of the Frankfurt Motor Show

From sausages to sore feet, masses of metal to marching for miles, the Frankfurt Motor Show is most things to most people. We caught up with a dozen of the car industry’s finest at the sprawling Frankfurt Messe halls to find out what the world's biggest motor show means to them. Please click on the image above to view the rest of the story