Sirius Sat Radio

[mtsupilot]

I purchased and installed a Sirius Sat Radio for my 2007 A4 with Nav. I am about to purchase a S5 with Nav. Will the Sat Radio be compatible or should I order it as an option?

[AudiA4b6US]

The 2007 A4 receiver will not work in an A5/S5 but AFAIK Sirius is standard in the S5 and does not need to be ordered as option.