A couple weeks ago, I noticed that the PCM dumped all my personal settings, such as displays I enabled to be shown in the MFD. A couple days ago, I noticed that the "Phone" routine was inoperative; it said "Function Not Available." I took it to the dealer today. They said the problem wasn't something wrong with my PCM; it was caused by a change in Sirius' com signal that wasn't compatible with the PCM. They said it affected a lot of cars, and they were inundated with calls. PCNA had already composed a fix and the dealer loaded it into my PCM yesterday at no cost. The car now has PCM version 4.73.