There is a dealer recall on this. Check with your dealer...still think they replace the gas tank free of charge. There is a hose that has a metal clamp or something that rubs on the PVC material tank, rubbing a small hole in it, up close to the top of the tank near the filler mouth. It's a common problem, causing vacumm issues too and setting lights besides the smell. Good luck and please post back as to how the dealer handled this.
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1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon. My cars have been running so well lately they've got me worried.