A visitor looks at a Citroen diesel engine at the Geneva Motor Show in Switzerland in 2010. Diesel is popular in Europe but not the U.S.; now, automakers are giving the technology more consideration as a means to meet new fuel economy standards. Martin Meissner/AP hide caption

itoggle caption Martin Meissner/AP

Detroit Auto Show photographers sometimes mistake car designer Christine Park for a spokesmodel. "It's a very male-dominated field," she says, "so it's something that people don't expect." North American International Auto Show hide caption

itoggle caption North American International Auto Show

Ford's MyFord Touch interface allows users to manage phone calls, navigation, entertainment and the car's temperature through a touch screen on the dashboard. Stuart Ramson/AP hide caption

itoggle caption Stuart Ramson/AP

The 2012 Dodge Dart is unveiled at the North American International Auto Show in Detroit on Monday. Tony Ding/AP hide caption

itoggle caption Tony Ding/AP

Jonathan Browning, president of Volkswagen Group of America, attends the U.S. unveiling of the 2012 Volkswagen Beetle, a new version of the iconic car. Volkswagen saw a 26.3 percent increase in U.S. sales in 2011, and has its sights on becoming the world's No. 1 carmaker. Jamie McCarthy/Getty Images hide caption

itoggle caption Jamie McCarthy/Getty Images

Chrysler President Olivier Francois reintroduced his company to the world at the 2011 Detroit Auto Show. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images