Considering the forum where we are, this next one is shameful...
Some days ago, the windscreen wipers fluid was over, but I was never warned by the low-level indicator. Too bad, I already had an appointment scheduled at the garage for some other standard reasons, so I asked the mechanic to check the indicator of the windscreen fluid tank.
Except... It turned out I don't have any windscreen flid tank indicators installed on my car (yes, the last one had it)... I bought the car one and a half years ago and I never had that occurrence before...