My auto start/stop keeps not working. I have taken it to the dealership and they just drive it in circles around the building over and over for a couple hours (or for two days the last time they kept it) and decide they have no clue. Last time when they kept it for two days, they said all they did was charge the aux battery and that fixed it. The first two times when I sat there and waited they reset the computer and that fixed it. All three times it has worked for one week exactly and then stopped working again. Anyway, reason for my question is I don’t fully trust that the battery is bad like they claim. I know they also reset the computer again so I don’t know if that’s what really caused it to start working again or them charging the battery. Nothing else has any issues. It’s not throwing any codes at all. Before I go and spend $400 on a battery I wanted to try charging the battery myself to verify it is the battery. I have googled and searched YouTube and cannot find anything about the location of the aux battery (I assumed in the trunk) for a 2017. All results show a 2016 and mine does not have a cut out in the trunk liner like all the pics/videos show. Does anyone know where to find the aux battery on a 2017 LT?