Great thread Tim, especially seeing as my passenger footwell keeps flooding.
I have a 5 door with no sunroof, I have checked my pollen filter and its cover on several occasions especially after plenty of rain and it always seems bone dry, I even put my hand down the vent hole under the filter and the foam at the bottom of the vent is always bone dry.
This weekend I vacuumed the water out and left the door open with the sun doing a great job and dried it out (again!) On Saturday night we had a good 3-4 hours of heavy rain and I expected to find all my good work undone on Sunday morning but I was pleasantly surprised to discover it was still bone dry. I tempted fate later and gave it a good wash using plenty of hot soapy water and a pressure washer and it still remained dry.
So, I can only assume that my water only comes in when the car is on the move. I do quite a lot of motorway miles and often in rain so I am guessing it must be during this driving I am filling the car up.
Any ideas?
Thanks in advance
Ian