I second the suggetions to lift up the carpet / sponge! and let them dry out thoroughly, I might also spray down some mold inhibitor etc too.
any connections that might have gotten wet, pull apart and spray with some contact cleaner etc to prevent corrosion.
Good luck!

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2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.