Hyundai engineers are testing the 2010 Sonata, codenamed YF in extreme weather conditions in the Northern Sweden.
New Sonata will have a similar coupe-style design like the VW Passat CC and new Opel Insignia. Hyundai has developed a new platform for the 2010 Sonata, which is the first Hyundai to get a new gasoline electric hybrid system.
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