Water Footroom passenger side (heat exchanger)

Moin people I gallube caught me at my AUDi 80 B4 ABT. Hope it is not the heat exchanger. Hello it has rained quite heavily tonight This morning I fell into the footroom (passenger side) my mobile phone. (car was already about 8h) I noticed that the footroom passenger side is a bit damp.Naja nothing was thought about it and was picked up from the work collapsing. The car was standing on. I then looked again at 16.30. (Hat rained the whole day.) ) The car stood thus almost 16h. and when I looked there it was really wet in the driver’s footroom. I put everything dry and well heated. The windows have easily fogged but with the ventilation got this under control. Besides it does not smell sweet. My question is nevertheless it is possible that the heat exchanger is over ? Or was the water from outside ? Did however all drains controlled and the fan engine was also dry. I looked then and if one over the footroom nozzle Auf the driver side is garnix. Cooling water loss minimally due to defective flange. What do you mean ? Rainwater or heat exchanger? Is it possible that the heat exchanger has lost the water after 16h switched off ? Audederdem the water should be warm when it comes to heating if it comes from the heat exchanger or not ?