Help changing my steering wheel!

[Singh97]

Hi,
I want to change my sports steering wheel to M steering wheel on my 2011 LCI 35i. Now I have seen many threads talking about how to remove the old wheel but my question is:
1st: What are the consequences of disconnecting the battery?
I mean will I trigger any errors or loose any saved memory due to the battery disconnect? Any precautions I need to follow while disconnecting or connecting it back (I mean other than leaving my trunk open and rolling the windows down)

2nd: I cannot find the exact list of tools required.
I would really like to listen form all the members who did it.