To add some info on... here's the MTF-LT-3 fluid on getbmw parts:
http://www.getbmwparts.com/partlocat...catalogid=4462 for $140 / 5L
This is probably just over twice what you need. I think you'll use less than 2.5L for a drain and fill, and this is 5L. I'm not positive though - have not done this myself yet. But I got quoted $32 for .5L, so this 5L will save a good amount of money and cost nothing extra for the second 2.5L of fluid. I was quoted $160-180 (can't remember) for 5L at a parts department. You could probably also sell the extra 2.5L here.
The parts dept. person told me there will be a sticker with the fluid necessary on the bottom of the transmission somewhere, so you can check there. If you call them with your VIN #, they can also look it up for you. This is for my 08 135i convertible, so check for your newer models accordingly.
I believe I need an 8mm hex wrench for both plugs, and a 10mm socket to remove the plastic cover to get to the transmission.