| Below is a list of FAQ from sirius website: Hope it helps
Q. What is the monthly fee for BMW customers?
A. Sirius Satellite Radio will be offered to BMW customers at the standard fee of $12.95 per month, with the first 2 months free (one year commitment required). There will be no activation fee for BMW customers if the receiver is activated at the center.
Q. Is there an annual commitment/contract?
A. There will be a one year initial commitment, with a 60 day service satisfaction guarantee. The hardware will be covered against defects in workmanship or materials for the length of the vehicle warranty, if installed at the time of initial vehicle sale. If installed after the sale of the vehicle, the hardware is covered by the remainder of the vehicle warranty, or one year, whichever is greater. However the hardware cannot be returned for credit or reimbursement if the customer is not satisfied with Sirius Satellite Radio.
Q. What is XM Satellite Radio?
A. XM is a competitor to Sirius Satellite Radio.
Q. What is the difference between XM and Sirius?
A. In short, Sirius Radio is a premium service that offers completely commercial free music on all 60 of their music channels. XM only offers limited commercial free programming. Sirius has 3 satellites in orbit, while XM only has two, resulting in a superior reception for Sirius Radio.
Q. Can I install XM Satellite Radio in my BMW?
A. BMW will only offer Sirius Satellite compatible receivers and will not be compatible with any other satellite radio technology.
Q. Can a Satellite Receiver be installed together with a BMW CD Changer?
A. Yes, the satellite receiver can be installed together with a BMW CD Changer, utilizing an additional adapter cable.
Q: How long will it take to install Sirius hardware and activate the service?
A. Installation time is approximately 1 hour on most models. Activation will take approximately 15 minutes, and will require credit card billing information.
Q. Will satellite radio work with Harman Kardon and/or standard BMW audio systems?
A. Sirius satellite receivers will work with both standard audio systems and Harman Kardon or DSP audio systems. | 
