Does anyone have authoritative figures for the towbar load limit (tongue download)?

The MY18 specifications sheet says nothing about it, while online reviews point to it being just 100kg. The MY19 specs however say it's 200kg. I just got an MY18 Tiguan Allspace fitted with a VW towbar, which says 200kg. So I'm guessing the real figure is 200kg, but I wonder why everything related to MY18 that I can find says 100kg.. 🤔