128700Km / 79360 Mls and inspection light is on

[J.Seven]

My car is a 2000 modell 4.4L

In 2004 with 84400 Km / 52328 Mls had an Inspection II and microfilter done.

In 2005 with 107000Km / 66340Mls it had an oil service and microfilter done.

So now it has 128700Km / 79794 Mls and inspection light went on, it needs to do the inspection I again.
I would like to ask two questions:
1.Should I change the transmission oil, or part of it like stated on this post?
http://www.xoutpost.com/x5-e53-forum/...hange-diy.html

2. What about the transmition filter, should I change it too?

3. I think I will change the coolant, steering and brake fluid, because I don´t know if the previous owner has done it.

J.Seven