(http://media.il.edmunds-media.com/bmw/m5/ns/bmw_m5_f34_ns_31611_196.jpg) BMW has released a lengthy new teaser of its fourth-generation M5 sedan, due out later this year, undergoing testing in the Alps.
Source: 2012 BMW M5 Teased Again (http://www.insideline.com:80/bmw/m5/2012/2012-bmw-m5-teased-again.html)