The Jaguar info is not exactly true. After inquiring about adding bluetooth to my 03 STR and the dealer telling me that my VIN was not in the range that the upgrade would work, I purchased the components and installed the system my self. It works like a charm.
My car was already fitted with the Startac phone so I just needed the bluetooth module and the updated PSE module. The install took me less than an hour to complete.

 

Both items were purchased from Ebay. I don't remember how much I paid for them but it wasn't too much that if it didn't work I wouldn't be out too much money. It took me about 14 months to find both of the modules on Ebay.

 

Aboyer or anyone who can answer

Which modules did you need to purchase from ebay? i also have just bought a 2003 s-type and am hoping to have this feature. Also, i'm not sure if i currently have it installed, do you know what i can look for to see if it is currently installed already? i might get lucky :-)

Thanks in advance