Originally Posted by Technic
For pre-03/08 E9x M3 you need to make sure that you have the latest code in your car before trying this iDrive controler swap.
Technic, thanks for the response. How do I determine if I have the latest code? If it turns out I don't, what do I do to get my dealer to install the latest code and what changes (if any) will it make to my car?