I just bought a 2007 BMW 328i with 72k miles on it. Its under CPO. I am having a similar problem when the engine is idle and there is noise coming and the vehicle vibrating, when i press on the gas the sound goes away. Is this anyway also related to the following HVA problem related to BMW's prior to 2008 (
http://www.e90post.com/forums/showpo...postcount=1057)