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Mercedes-Benz C63 AMG coupe revealed

Mercedes-Benz has followed up the debut of the C-class coupe at the Geneva motor show with the unveiling of this new range-topping version, the C63 AMG coupe. Set to land in North American showrooms in September following a planned debut at next month's New York auto show, the new BMW M3-challenger receives the same updated mechanical package as the recently facelifted C63 AMG sedan. It will be sold from the outset as a 2012-model-year car.

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.

Porsche 918 Spyder gets its own website

The Porsche 918 Spyder (pictured) now has its very own website It’s more than two years since the Porsche 918 Spider went on sale, but it’s now getting close to arriving in Porsche showrooms so Porsche has created a new microsite dedicated to all things 918. Since it went on sale, the 918 Spyder has been developed further and the production 918 will come with 4WD courtesy of its electric motors – one delivering 154hp (rear) and the other 127hp (front) – which, combined with 608hp from its 4.6 litre V8, promises 0-62mph in 2.8 seconds (and 7 seconds on just the electric motors) and on to 211mph. The new 91 microsite reveals Porsche’s self-imposed challenge was to beat the Carrera GT by at least 10 seconds on the Nurburgring, and there’s video of the 918 out playing at the Nurburgring, as well as plenty of photos and detail on exactly what the 918 offers.