I am new to this forum and have just purchased a 4 years old 330Ci M Sport and it has a Navigation System installed, OS version 4-1/12. I see that the threads discuss version 27 / 28 and now 29. I have a very simple question, my appologies if this has been ask previously, that I hope someone help me with please - If I down load one of the updated OS versions, can I jump from V12 upto say V28 in one go? also what changes will I notice? The car came with 2003-2 DVD disc.