I talked to Service about this about a week ago wrt my '17 S 75D. I was told that that they had queried my car's diagnostics before calling me and there was no indication of errors to date. He acknowledged that I was entitled to a replacement anyway, but that due to supply line issues for the past year, they were reserving the modules on hand for vehicles that were clearly affected. YMMV, but this made complete sense to me.
In the meantime, I upgraded to MMU2 so it's a moot point for me.
In the meantime, I upgraded to MMU2 so it's a moot point for me.