Just had a look in MY17 Passat. I didn't see Predictive_limit_speed_control, but did have Speed_Limit_Assistant in long coding in Module 13 (ACC).
I checked in the Driver Assistant Settings in the "Car" Menu. I now have a tick box for "Top speed of Dynamic Road Sign Display" (it may have already been in there from previous tweaks, can't be sure). Not sure if this is the same as above posts, but thought I'd try it out. It hasn't worked so far, may need some other adjustments to work.
Mine - Mustang GT MY20 - Carbonised Grey - "Nicky"
Hers - T-Roc 140 TSI Sport MY21 - Reveena Blue - "Rocky"
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