My wife's stock 2002 2.5RS has just recently started having this problem. When the car is sitting with the engine at idle, the cabin starts to smell so strongly of gas/raw fuel that it makes my eyes burn and I even start to get a little light headed. The problem doesn't go away once the engine is warmed up. I asked her to take it to the dealership today since she works about a block away. They told her that they couldn't find anything wrong with it, and it could be the cold weather causing the fuel mixure to run rich, and just put the vents on recirc.
I disagree, but they said there is nothing else they can do. I told her to get new fuel and air filters when she picked the car up this afternoon and I would install them myself. The current fuel filter only has about 20k on it though. I couldn't see any visible signs of a fuel leak anywhere under the hood, but the smell seems to be the strongest in the passenger side fuel rail area. Any ideas?