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All, My 2013 C-Max Hybrid has 115,000 miles and within the last four months the rear lift gate started acting erratic. On a push from the console it will go up a little bit and then go back down and not lock. Then a second push will sometimes send it back down for a lock, or partway back up. And once it starts traveling up after possibly multiple stalls, it will finally make it all the way up. It does this on the console button, and on the fob as well. Sometimes it goes, struggling, all the way up the first time. It seems to go from the all the way up position to closed most every time (80?%). I took it to Ford last week for a diagnostic and they told me they could not replicate the problem. I was -disappointed-... and asked them to try some more, they did and ultimately did not find -any- codes being thrown, and they mentioned if it were the electric liftgate strut going it throws a code. So after all this and 3 days of review, they said the only conclusion they can come to is that my 12V battery needs replacing, yet they didn’t seem super confident in this diagnosis. So much so they did not charge me the normal 1 hr diagnostic fee. They said the aux battery is the original one and now well over 5 years old. As well after the car is turned off, the electronics quickly shut off with that message ‘Turning off to save battery/setting’ or something as such. The theory they floated it that the aux battery holds the positional settings of where the liftgate is positioned. I have had the Liftgate alarm, that it is ajar come on while driving down the freeway and for no good reason (no cargo back there). Can anyone comment on having a similar problem? I don’t mind replacing the battery, it is a little of a pain, and I was going to go ahead and put in an Oddysey as I have super experiences with them, but I don’t want to put in a premium battery if this is not my problem. Any help or comments appreciated. I’m certain the dealer is giving me their ‘Best Guess’ diagnosis based upon no codes. Thanks in Advance for the help.