E-tron Ch-524 Voltage Regulator (bwd R-280) Nos on 2040-parts.com

One Lap of the Web: Porsche 959s, the Alfa Romeo 4C and the Mercedes-Benz A45 AMG vs. the BMW M135i

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. -- When initially produced to satisfy FIA homologation requirements in 1986, the Porsche 959 was the world's fastest street-legal production car.

Video: Possible new Pantera spotted in Italy

A YouTube video shows what appears to be the newest evolution of the hallowed De Tomaso Pantera. Caught leaving the De Tomaso factory in Grugliasco, Italy, the heavily camouflaged two-door coupe did not muffle the brawny engine sound. The rumor mill is speculating about a V8 powerplant sourced from Ford, like the original, and an aluminum body.

Mercedes M-Class (2011) first official pictures

This is the new Mercedes M-class. Evolutionary styling hides a range of new engines, including a four-cylinder diesel as Mercedes tries to give its American-made SUV a dose of increased efficiency. Mercedes M-class: design and interior Mercedes wasn't tempted to radically reshape the M-class for 2011.