Another thing I have found with my Jazz is once the fuel light comes on it stays on, until you have put sufficient fuel in to reset it. it obviously has a designed in hysteresis. Previous cars I have owned, the fuel light would start flashing on bends, or under braking, and didn't stay lit until a few miles after the first blink. My Jazz doesn't work that way. The light comes on under braking or cornering, then stays on until I fill up. It is either on longer, or is set for a much lower level.
When I went to buy the car the light was on, it was on for the extended test drive, and when the guy came to pick me up to complete the sale it was still on. About 50 miles from my first drive of the car. He then filled up on the return back to his sales room.