I have done a search, but I'll be honest, I have no idea what the correct nomenclature is for what i'm looking for. so...

I have an 08 E70 (4.8) and my Nav disk is outdated to say the least. I see all of these different versions on the forums, but I do not know what I have. All I wanted to know was, is there a place that I can get an updated DVD with more updated maps (without spending $300+)? I live in TN, so I'm only needing the East coast version.

Again, I know that a search could have solved my problems. But not knowing the different versions of the Nav or which one comes standard in my car made the search function slightly useless.