If the seat switch/module got wet it could have been damaged. - I've not done a seat module on the 2008+ cars but the earlier ones (2001-07) needed a software download to make them work. The parts catalog shows software being needed when replacing that part on your car. From experience during a seat module replacement, the seat would move with the NEW module, but needed software to make the memory function.
I'm not sure if a used part would ever work, but it has been reported that some modules in these cars that normally need software can been used in another car. Used parts generally can't be programmed to another car. (xemodex does reprogram some)
Fuse 20a? - Wiring diagram shows fuse 13 in the 15/36 fusebox, and f3 in the CEM being relevant. Hope the diagrams help.
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