Daimler Chief Executive Dieter Zetsche speaks next to the Mercedes S500 Intelligent Drive car, the first self-steered Mercedes, during a media preview day at the Frankfurt Motor Show (IAA) September ... more 
Daimler Chief Executive Dieter Zetsche speaks next to the Mercedes S500 Intelligent Drive car, the first self-steered Mercedes, during a media preview day at the Frankfurt Motor Show (IAA) September 10, 2013. The world's biggest auto show is open to the public September 14 -22. REUTERS/Kai Pfaffenbach (GERMANY - Tags: BUSINESS TRANSPORT) less 
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Reuters | Photo By KAI PFAFFENBACH / REUTERS
Tue, Sep 10, 2013 5:18 AM EDT