So far I had not taken the wetness in the car so seriously and pushed it onto a leaky rear flap seal. Now in the constant rain weather the car was so wet inside, that I looked at it more closely and actually the wetness on both sides comes from the roof. The sky is wet on both sides of the roof and hangs quite loose at the back, so someone will have been there before. So I once pushed out the roof strip on the left and then came the shock: plenty of rust. Of all at the roof! Never had a car with rust on the roof, let alone with a galvanized body. How could that be? Man, I laughed at it there … I just popped off paint and seal mass at two places now, but that looks quite like there was rust over the whole length in some places.