And if the wing won't move at all, you don't need Klaus yet. I know this sounds like advice from a 3rd grader, but open the hood, take the fuse box cover off, and check fuses. THere will be a card under the lid, use it to find the spoiler fuse, and the top fuse(s).

Now, the BCM "Body control module" directly operates the wing, and the top control module does a lot of 'handshaking' with the BCM as well. I"m thinking there is something goofy going on here. Again, my first reaction is to replace the battery.

Did this car sit in a horse barn recently? What I mean is, could there be a chance of rodent damage to the wiring harness? I ask, because we have seen it before. A mouse got into the box next to teh battery that houses the BCM, ECM and RCM and chewed wiring. That was an awful mess.