Why not Firestone?



Did a little research and according to the Tire Rack ratings and Consumer Reports, my best bet for something *quiet* that will last a long time is the Firestone Destination LE 2. However, my trusted local tire guy says never, ever put Firestones on a Mercedes. I've searched this forum and found quite a lack of posts with people using them. So I'm wondering why not Firestone? Are they really bad on a Mercedes but other makes get great ratings using them?
I just checked the website (Firestone) and they don't make the 20' tire for the 450 or the 21' for the 550, only for the 19' rims.











