Likewise, we experienced the aforementioned fragrance on holiday in France last month, it only seemed to occur after filling the tank. It turned out that one of the jubilee clips on the fuel hose between the filler and the tank had worked its way loose enough to allow vapour to escape (there were no signs of petrol itself leaking). 30 seconds attention with a screwdriver sorted it after pivoting the luggage rack back and removing the spare wheel. Hopefully your remedy will be as straightforward, best of luck!
