both rear drains on my SSEi came out once..what a mess...it caused very little water on the floor however, just soaked the headliner and there was water all over the leather seats. My concearn might be that you have a leak coming in from either the trunk or under the back seat, turns out i had a rust hole the size of a quarter, that caused ALOT of water!
rear seat comes out easy enough, if the underlay is really wet, id almost reccommend cutting it out, and replacing it or washing it really well as it will cause a nasty odor after it dries out...TRUST ME lol.
and remember..dont have to much fun....lol
Damien-they don't make them like this anymore
97 SSEi. 3.2mps,msd,optima,1.9 YTs,245 RE750s,SLP Headers,custom ported SC inlet/outlet, 180 deg, INTENSE pcm,42.5#injectors,255lph pump,custom soilid motor mount, 3.0 mps(maybe), and the nut behind the wheel.