I was doing the wiring to a new sub install on my avant and when i pulled all the trim out under the spare tyre there was quite a bit of water sat there. Mainly under the metal reinforcement panels. Soaked it all up and dried it- must of been a good tea cup of water. Both side of the cubby's are dry, just the usual small stones that end up in there from the vent flaps So 2- days later after a rainfall the right side spare tyre area is full of water. Any one had any similar issues on their car and what the cause/culprit was?