2005 T5 AFM controller
 

I just bought a 2005 T5 with 28K. I want to install a Sirius radio and have all the components for a plug and play device. From what I have been told, and been able to find, the best option for this is to go with a FM modulator that connects into the AFM controller. However, after checking VADIS for information, I have not been able to locate this controller. It says that it is located on the under the rear window (under the covering just above the back seats). When I checked this location, there was no controller to be found. Does anyone have any information on this, or have any comments on how to install a Sirius radio properly?

Thanks!