I have a few questions regarding updating my Nav software. I have SW 4 - 1/60. (Is this MK IV??)

I am thinking this is MK IV (I am a newbie here and new X5 owner) am I right? I am looking to get the 3D persective, (someone is selling a guide as to how to do it on ebay) as well as my maps.

My questions are:

1. Is the dealer the only one who can update the software? Does the dealer/stealer charge for this update? I have looked here, but there is no guide as to how to update it. (or I missed it which is very possible)

2. If I do update the software does that give me new maps, or just newer features? If so, what feature come with the update.

3. What is the current highest software upgrade that I can get. I have a service appointment for my 45k and want to have a list for them to do things.

Thanks for you help!

JB