One Lap of the Web: The Economist talks cars, Maria Sharapova's Porsche and crazy bikers

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. -- Have you ever seen two motorcycles going wheel-to-wheel at 200 mph in the rain?

New Mercedes-Benz SLK to offer Web link

The new Mercedes-Benz SLK, due out next spring, will be the automaker's first vehicle with on-board Internet access via its Command infotainment platform, AutoWeek sister publication Automobilwoche has learned from company sources. The updated Mercedes C class also is expected to offer Web-browsing capability when it arrives shortly after the SLK debuts. "We will then offer our own online services as well," a top executive told Automobilwoche.

Porsche Panamera Sport Turismo concept (2012)

This is the new Porsche Panamera Sport Turismo concept car, unveiled on the eve of the 2012 Paris motor show. We hear that we won’t see a Sport Turismo version of the current Panamera, but this concept instead previews the facelift treatment that will be applied to Porsche’s four-door saloon as part of a mid-life refresh in 2013. And beyond that the Sport Turismo showcases a second bodystyle than will join the range when the Mk2 Panamera appears in late 2015.