2019 Crew 4x4 HR
that sounds correct (3 bolts is what I remember). Unfortunately I didn't take down the part number, so glad you were able to find it and share here.Paging @fireball05 and @mve
Great info. I was able to flush out the part number and confirmed the crew has this reinforcement piece and the cargo does not.
The Mercedes-Benz part number is 9107304800 and catalogued as “Reinforcement Beam”. Retail cost is approx $284. Per MB attachment requires 3 M8-16 or M8-20 screws.