text: Hi sharagar,
  I could not find a difference between 2019 Mapilliary imagery and the tags of https://www.openstreetmap.org/way/149037469, so I don't think that we need to re-survey this spot.
  
  There might be a misunderstanding: "frei" does not mean "free of" in this case. Instead, it indicates an exception to the rule of the traffic sign above, i.e. hgv is allowed here if (and only if) it is "Lieferverkehr"(delivery). This leaves open the question: delivery to whom? It could be "HVG must have start or end point in the munich area to be allowed here."
  Without an expert in German traffic law, we won't know for sure ...