We've only had our '03 M5 for 4 weeks but I need some help from some of you tech savy people on how to upgrade the software version. We have the Mk IV with software version v 4-1/12. I believe this is the original software which has never been upgraded. If anyone can help and advise me on just how to upgrade the software to v26-31 it would be really appreciated. I'm not too tech savvy so too much information is welcomed with open arms. Thanks in advance for your help!