Replaced trunk lock actuator. The old one was acting wonky; It would pull the lock open, but on subsequent presses of the fob, it would not move all the way, then moved less and less. If I let it cool off, it would work.
Got a pre-owned part for $26 shipped. Better than $100. Works like a champ.
My car has the Aero Kit, so the latch is different than some pics I've seen...
Didn't have an 11mm, and the nut was spinning...
Removed the cover
Allen screws