The tilting function was stuck, so just pop off the cap, and wiggle the little white switches a few times, maybe spray some contact cleaner in there (NON CONDUCTIVE, as the seats always work, so maybe disconnect the battery, i didnt, who cares

Then pop the cap back on, maybe its something in the cap? I popped mine off twice wiggled some more and then it worked. The switches worked fine if moved individually.

See illustration and picture.
The green is the switches, middle does forward and backwards, the pin in front does the tilting, wich didnt work on mine. U can pop it off with a plastic pry tool, as the plastic might crack around the switches and it wont function anymore. When poppibg it on, make sure the holes inside the cap line up with the white pins (green in my drawing) because that is what makes it move (obviously )