Noisy Rattling Dash in my 05 S Convertible
 

I just bought an 05 S Convertible. 61K miles and loaded with every option available. Very god shape. The dash (under) rattles like crazy. My dealer told me that they all rattle (bad engineering) and for $1500, I can have a kit installed in the dash to eliminate the rattles. Does anyone have any experience with this? Thanks, Wayne