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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.

Audi R8 GT Spyder arrives

Audi R8 GT Spyder - a mere £200k You didn’t think that Audi – Kings of the niche-fill – would settle for producing just 333 tin-top Audi R8 GT, did you? Of course not, so you’ve been expecting the next instalment in the race to make the most expensive Audi, and here it is – the Audi R8 GT Spyder. Just as it was with the R8 GT Coupe, the R8 GT Spyder will be limited to just 333 cars and all of those will come in LHD, even though Audi expect 30 to be sold in the UK.

Concept Car of the Week: Vauxhall VX Lightning

Both Ford and Vauxhall celebrated their 100-year anniversaries in 2003, but despite much of the attention being focused on the American giant, GM's UK subsidiary unveiling its own birthday present: the VX Lightning. Revealed at the Dorchester Hotel in London in May, the Vauxhall Lightning concept was a joint project between the GM North America (GMNA) Advanced Design Studio in England and the Opel/Vauxhall Design Center in Rüsslesheim, Germany. The Vauxhall ‘V' brand motif is a recurring theme throughout the car, despite the company's relative lack of global recognition.