When I plug the stilleto into my car adapter it shuts down. Then powers back on to a screen that simply reads "Sirius Connect"

please use other adapter.

Page 32/33 othe PDF Manual at the link below details how to change the frequency.

http://audiovox2.info/docs/common/SLV2/SLV2_OM.pdf

It may be a problem with the power switch, I too had this problem. It seems like the power switch is stuck in "down" position as if you were holding it. I remove my battery cover (along with the battery) and gently jiggle the switch up and down to "loosen" whatever may be sticking it in place and it seems to work. I have encountered this problem several times. I did not send it out for repair. It works fine for me (knock on wood).

sounds like the mother board maybe on its way out - is it under warranty?

The antenna should plug into the Stilleto car kit if your Audi is equipped with Sirius already. Otherwise you will have to use another Sirius antenna.

Try rewiring the system matey, you proberly need to daisy chain them together

The power srouce is usaly locate at the back of the stero.. if it isnt.. its at the bottom. I would als try pluging it in.. and leaving it for a dayu... becuase maybe it charges

Truthfully, you will be better off just sending it back for a new one.

My Sirius ST1 receiver froze. It reads "Sirius Radio" with the logs but goes no further in booting up. Any solutions?

I had to re-install Version 1.1 of My Sirius Studio from original CD that came with my Stilletto 100 as the most recent Version of My Sirius Studio did not recognize my Stilletto when I plugged the USB into my PC, when I re-installed Version 1.1 over the newer version, I shut down the Stilletto by holding down the power swith for 5 seconds then powered back up while holding down the Options and Display buttons at same time until the screen asked me to plug the USB cable into PC to recover. I did this and about 5 minutes later the the software/firmware was re-installed in my SL 100. I then plugged SL 100 into antenna and selected satellite radio, took about 1 minute to re-aquire the station ID's and Icons then I selected Sirius Hits 1 then everythings was back to normal, other than I lost all of my stored songs and recordings, but at least my SL 100 is operational again.