Mercedes® Oem Brake Caliper, Front Left, 107 Chassis,1973-1980 on 2040-parts.com

Porsche Panamera

Porsche today revealed the first official photos of its new four-door grand touring sports car, roughly nine months before its scheduled market launch. Joining the 911, Boxster and Cayman sports cars as well as the sporty Cayenne SUV, the Panamera is Porsche's fourth model series. The designers of the Panamera sought to position their latest offering as a brand-new and truly different model while retaining the defining Porsche look.

Concept Car of the Week: Opel CD (1969)

Despite its sophisticated suspension and spacious interior, Opel struggled to sell its big Diplomat luxury sedan. It was 1968 and Opel simply couldn't compete with Mercedes-Benz, the leader in that segment by far. Bob Lutz, then a young executive at GM Europe, thought of using the sedan's chassis to create a large GT Coupe in an attempt to boost both its sales and profile.

GM's Lutz to retire May 1

General Motors Vice Chairman Bob Lutz plans to retire from the automaker effective May 1, according to a statement released by GM on Wednesday. Lutz, 78, had been serving as a senior adviser to GM Chairman and CEO Ed Whitacre after shelving retirement plans to take charge of the automaker's marketing after it emerged from bankruptcy in July 2009. An outspoken executive who both challenged global warming and championed GM's all-electric Volt, Lutz is credited with revitalizing GM's product development efforts after being hired by former GM CEO Rick Wagoner in 2001.