Have a 2020 C300 AMG in the garage (GF's) . I read the warnings, heard the rumors, I thought "How bad can it be?" Had it since 41K then @44K , it ate some rare coolant hose.
I'm sorry but this day and age IMHO things like that (a hose failure) on a low miles, perfectly maintained car are pretty much inexcusable-right up there with a broken window regulators.
Last time things like that were issues on cars Polio was a thing..Is this Germany these days?
EDIT: It was also a CPO car (which got it's inspection pencil-whipped by the local friendly but useless Benz dealer)