cayenne s(955) Problems ! (electric)

Hello guys, I had created a thread yesterday, but it was a bit inaccurate I’m sorry again, here the topic again and a bit more accurate. So my cayenne S 4.5 was standing a few weeks in the driveway. I wanted to start it yesterday morning, there came a beeps noise and following errors welcomed me (Zündschloss defective, brake force distribution, air suspension). I folded the driver’s seat back and looked sometimes. I discovered under foot mat water as I experienced have this with this model series a disease. After I then wiped up the water and so far dried up, I removed the battery and put it on the charger. This morning he stood then on green so I then made the battery again everything professional and tried it again, but again nothing. I then read something of oxidized cables but found nothing suspicious. I urgently need help where I still do something with the thing finally wied he runs I thank you in advance.