Mid/rear Seats Assembly Problems of BMW 530

After traveling for several weeks, my 2006 BMW 530i was parked in my drive way. When I returned home, I opened by door to find mold growing all over the seats , interiors surfaces, and a bad odor. I opened the back door and found 4 inches of water standing in the floor board. I immediately used my wet/dry vac to suck all the standing water out. As I looked around mold had grown all over the leather seats, interior trim ,and carpet. I started to do some research on bimmer forums to see what might the culprit. This appears to be a common problem with many BMW sunroofs of this vintage. I was able to remove the back seat and I found that the cloth between trunk and rear seat was also saturates with water, mold, moisture. I had read to pull back the carpet and I found at lease 2 inches of standing water in both rear floor board areas. I also noticed many electrical components were under water. My alarm was constantly going off. I would reset it from the key remote and it would starting sounding off like the alarm was set off. I had to disconnect the battery terminal to get this to stop. So it is clearly a short in the electrical system. I am just returning form a business trip and plan to get it towed to a dealership to get an estimate to replace the carpet, deal with the mold that I am not sure how will be treated. And address all the electrical issues since I do not have a way to drive it now. I have owned 6 other BMW and this one for 5 years. I have never seen any kind of flooding like this.

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