Future cars debut at German show

A model stands next to a transparent car showing security components at the 64th Frankfurt Auto Show in Frankfurt, Germany. Europe's largest motoring expo got underway with a raft of new models designed to show that the global automobile industry is alive and kicking despite uncertain economic times. The show is held every two years. (Michael Probst / AP)

Visitors take pictures of Lamborghini sports cars at the Frankfurt Auto Show. (Kai Pfaffenbach / Reuters)

Volkswagen's Nils concept car makes its debut at the Frankfurt show. (Thomas Kienzle / AFP - Getty Images)

Mercedes-Benz's F125 concept car recalls the company's "gull-wing" door designs from the 1950s.(Frank Rumpenhorst/EPA)

The Bugatti Veyron L'Or Blanc, a one-off "white gold" vehicle, is being built in co-operation with Germany's Konigliche Porzellan-Manufaktur, a centuries-old porcelain producer based in Berlin. It willl cost about $2.2 million.(Kai Pfaffenbach/Reuters)

A model poses inside the Citroen Tubik concept car.(Thomas Kienzle/AFP-Getty Images)

The Ford Evos concept car is another "gull-wing" model.(Michael Probst/AP)

The new Volkswagen Up! microcar, seen in its buggy version, is displayed at the show. (Frank Augstein/AP).

Mercedes-Benz's new AMG SLS Roadster makes its entrance at the show. AMG is the company's high-end customizing division.(Frank Rumpenhorst/EPA)

BMW CEO Norbert Reithofer speaks during the presentation of the company's i3 and i8 concept cars. (Ralph Orlowski/Reuters)