I just bought an 05 S4 Cabrio with a stock XM Tuner. Unfortunately, since I activated with Sirius/XM I have been able to receive only about 2/3 of the station available and none in the higher channel range. Numerous calls to SiriusXM have been non-productive. SiriusXM tech support has left me with the option of taking it to a dealer for a hard reset. I would like to avoid the expense of that. Does anyone have a suggestion as to what steps I might take to get the full menu of SiriusXM stations? Also, if the module is bad, what model number do you suggest I purchase to replace it. Thanks in advance.