Thanks everyone!

So i have been watching several videos on what I'm trying to do. I definitely think i can do the jobs stated, however, as duxthe1 showed there are things to reset. Are there others in my list i should reset? I also saw that the aux battery should be replaced (may just want the money!--lol) when doing the battery (fuse #448 (?) may blow when replacing it. This was per FCP.

Is the battery a Lead Acid or AGM? The MB battery has lasted just a little over 5 yrs and am considering buying another since most batteries i've owned only lasted 3 yrs or so.

While i am possibly doing the aux bat I can replace the blower fan motor. so i guess that's a plus.

Again thanks for the help!