I have a similar problem with my '99 XK8. I have 39,000 miles on it (yes, low miles - work too much and short drive to work). At random I have a very strong smell of gasoline inside the car. It doesn't relate to fueling up, low or high fuel levels. It is random, although it seems to happen more frequently at start up than just sometime while driving around, although it does happen then on occasion. I have had the local Jaguar dealer look at it three times so far. They don't really seem to be with it. I suggested checking the fuel filter (in the trunk?) And the fuel tank vent tube. They are suggesting that I need the air conditioning system serviced (no, not the air duct - the R134, closed loop system! I'm not kidding!). Did you ever discover the source of your problem? If not, I'll keep you informed as I try to find it on my car.
Tuesday, February 21st, 2006 AT 6:25 PM