As a relatively new owner, I am curious if others have had experience with improving the general sound insulation of the Model S and whether or not Tesla has proposed the possibility of such from the factory.
Here is a thread on what one person did. http://www.teslamotorsclub.com/showthread.php/34679-Sound-deadening-work-begins-next-week-will-report-before-and-after-data?highlight=Sound please note that his is one of the early Model S and Tesla has been steadily improving sound proofing since then. To my knowledge, Tesla will not do this type of sound deadening work for you.