The amount of fuel remaining today is actually rather generous. Old Ford's from the 60-70's would promptly stop driving the moment the needle hit E on the fuel gauge.
Manufacturers will only tell you that when the low fuel light comes on, it's time to refuel. They don't want consumers to drive further for liability purposes, and also running out of fuel can permanently damage a fuel injection fuel pump.
My advise, time your refuel at the exact time the display reads 0 miles, refuel, and observe the gallons (liters) that it took, and compare it to the capacity listed in the owner manual. In the US, I have done this and found that the TC would take 13.8 gallons at 0 miles, and the manual spec is 15.8 gallons. Basic math shows there is about 2 gallons left the the tank on "reserve". Compare that to your average fuel economy, and you can guess how many more miles you can drive.
Of course, once I have driven past that mark, there is an uneasy feeling, knowing you could run out and damage your fuel pump. And the start of a really bad, and expensive day.
I stopped doing this years ago. A lot of stress can be created waiting until the last minute to refuel. This especially happens when you're late and in a hurry to go somewhere and realize that now you also have to stop for fuel, which makes you more late and more stress. Some people like to massage their ego to see how far they can go, and then brag about it if they make it. Fools.
Now, when my fuel gauge reads 1/4 tank, I refuel. And on my terms, when I'm not in a hurry, like on the way home from work or the store. The amount of stress relieved is a solid feeling. I always have at least 1/4 of a tank, usually more, so if there is an emergency, you can jump in and go, and not have to worry about fuel.