Google: Cayenne wet floor. All Cayenne have issue with poor water drainage system according to the websites. My car was driving fine before I parked it, then when I try to start it, I got an error on the info display in red: Ignition lock fault, ABS brake proportioning. No crank from the battery, transmission locked in park. So I googled it and found many owners from around the world reporting this issue. The drainage under the windshield can get blocked easily with debris, and cause water to overflow inside the cabin and or electrical modules located in the windshield cowl area. On the driver side as per video, I removed the rubber carpet and forced lifted the permanent carpet, and found pool of water underneath, on the metal floor was a bunch of wires connecting to the car battery under the driver seat were all under water. I started emptying but more water kept coming, foams, rubbers were all soaked. According to the forums after removing all water, I needed to locate 3 set of wires amongst the bunch, these 3 are joined by twisting and wrapped with electrical tape/gauge from the factory. These wires since exposed are susceptible to corrosion. 1 set of wire completely snapped, apparently 1 wire is for ABS brake, and the other is for ignition key lock that renders the car immobilized. I followed the video describing the steps to fix this issue myself, and big bold letters on videos to do not bring the car to the dealer as they will charge thousands, if modules need replacing, rust an owner recorded a video online of his Cayenne dash stop working, all lights blinking while the car was in motion. Luckily mine malfunctioned while parked at home, not driving with my family. I have 2 Cayenne, a 2005 and 2008 that my wife drives. I need to follow forum instruction in cleaning the drainage and removing the grommet that can be blocked and cause water not to drain.

- Front Royal, VA, USA