It is not that difficult but you will need a 17mm and 19mm open wrench and an E8 inverted torx. I removed the battery, battery tray, intake and turbo inlet. Yeah it might have been overkill but I would rather have extra room to work. It doesn't take that long to remove.
Make sure when you are removing the 3 E8 bolts you back them out evenly. Also tie a zip tie below the 19mm nut so it doesn't wander too far down the line.
There is a really good write up, complete with pictures on another forum...