You need the correct Radio Code to proceed. If you do not have the correct Code, you will need to remove the radio, retrieve the Model Number, Serial Number, V.I.N. & Proof of Ownership. Call the BMW Dealer Service to get Code.There are some On-line companies that may be able to get the code for a fee.
Once you have the correct Code:
BMW Mechanic
Heavy Line Mech-, Mobile Electronics. Sales, Installation & Repair for 30 years. R/S, etc.