The memory seat buttons have stopped working on my 2015 TDI. I figured it was a fuse and was surprised to not find any fuse diagram behind the covers on the driver and passenger sides, nor one in the manual. So I proceeded to check all of the fuses, but did not see any blown. I then found an online diagram, but they do not seem to mention a fuse for the memory function. The closest I could find refer to seat modules and door modules. All other functions on the door seem to work just fine (windows, locks) and the seat controls work just fine too. Am I missing something or is this part of a module? Switch itself?