mk216v
Der Chef der Fahrzeuge
looks like a Preining rack, which Mk216v identified for me when I was lusting after the racks that are available on the W461 PUR as well as G550s provided to Mike Horn for his K2 adventure. I believe it's the "factory" rack.
Yes, that is a Preining, what Mercedes supplies on the PUR and such, and $$$$$$$$$$$$$$.