Today I replaced the 12V battery in my Ford C-Max. It was causing me all sorts of problems including the 'Shutting down to preserve battery' warning on the entertainment system when first getting into the car. There are LOTs of steps here, but this is totally doable by any DIYer...

Tools I used:
ODB Scanner: https://amzn.to/3gEPfAT
FORScan Lite App: https://forscan.org/home.html
Fastener Removal Tool (metal) - https://amzn.to/31UAa4G
Panel Removal Tools (orange) - https://amzn.to/2Zl440F
Push Clip 240pcs Assortment - https://amzn.to/2HiAqD3
Battery Terminal Washers: https://amzn.to/3LvsgXp
Dielectric Grease: https://amzn.to/3HGbN02
Ratcheting Wrenches: https://amzn.to/3IbQsLM


Chapters:
0:00 Introduction
1:32 Disable HV Battery
3:00 Accessing the Battery
10:38 Disconnect HV Connector
12:07 Removing 12V Battery
13:04 Re-Installing 12V Battery
14:55 Re-Assembling Vents
18:12 Re-Connect HV Battery
18:46 Clear ODB Errors
20:58 ODB Battery Age Reset
23:28 Manual Battery Age Reset
24:13 Wrap Up

The link is Amazon Associate affiliated which means that without costing you a dime, I get a few dimes when you use these links.

Thanks so much for the support!
Dan