Post by: AutomotiveBMW has announced substantial enhancements to the 2011 BMW 3-Series Coupe and Convertible, including outstanding style updates for 328i and 335i models and a new engine for 335i models. The 2011 BMW 3-Series Coupe and Convertible models will go on sale in Spring 2010, and pricing will be announced closer to the on-sale date.Fundamentally unchanged are each car's essential