Nicson Marine Vintage Aluminum Therostat Housing on 2040-parts.com

Video lets you experience the 2013 Range Rover reveal event

The recent public unveiling of the 2013 Range Rover confirmed what earlier reports suggested: The newest version of the SUV has emerged lighter and more efficient than its predecessors, but hasn't sacrificed the performance or luxury that built the brand's reputation. The Range Rover's all-aluminum unibody structure has a lot to do with this. Aluminum helps cut the weight of the vehicle's body by 39 percent.

Porsche chief Wendelin Wiedeking resigns

Porsche chairman Wendelin Wiedeking has bowed to mounting pressure in announcing that he will step down immediately. The resignation came Thursday, following a surprise meeting of the company's supervisory board at its Weissach R&D headquarters outside of Stuttgart, Germany, on Wednesday night. Wiedeking's announcement comes after months of tense and public infighting following Porsche's failed attempt to wrest control of Volkswagen, which left it with $12.7 billion in debt, and slowing sales in key markets such as North America.

Concept Car of the Week: Mercedes-Benz C111, C111-II and C111-IID

In 1962, Mercedes-Benz launched a research program to investigate the development of the Wankel rotary engine and its potential both on the road and track. While the early mule wasn't a looker, the prototype's design continued to evolve until a public unveiling of the C111-I concept, designed by Bruno Sacco, at the 1969 Frankfurt motor show. The coupé may have looked like the systematic further development of the Sport Light models from the ‘50s with its gullwing doors, but it wasn't a design study for a new SL.