the head

Well after an extended period of sitting (it's a long and grueling story that I won't get into) the aux battery in the trunk died. I had the typical battery warnings on the dash (apparently the main battery was also low at some point) and the 'convenience' message for the aux battery. Anyway after a trip to Pepboys, I replaced the rear battery and had a bunch of things not working right. I did figure out the window synch and the ESP reset thanks to this forum, but the locks and the trunk release didn't work - nor the top fold down. After reading around it had to be the PSE. The top will not move since the trunk never 'closes' without the soft close function to pull it all the way down. I checked the fuses under the hood and the one behind the passenger seat - all good. And after moving the hydraulic pump out of the way verified 12.4 volts going into the PSE black box.

For those of you that have experienced the PSE going out - is there anything else that I'm missing? I just want to cover the bases before going to the dealer. I do have the CPO extended warranty through MB, but the service department hasn't impressed me a whole lot in the past so if it was a quick fix I was just going to do it myself.