I have can only offer the advise that your problem may regard this unit called the 'Convenience Control Unit'. I lost my power seats, windows, windshield wiper(s) and sunroof all of a sudden. Just overnight...I swore it was some Master Control Unit...turned out to be fuse #2 which wasn't clear in the owners manual nor via the fuse box cover chart..point is..in my pursuit I looked at this CCU which is located UNDER the floor of the rear driver side passenger. I am not saying under the rear seat, this is under the floor itself...very strange...if your car was flooded to the extent you mention that be something to look at....