He said that MB was standardizing oil filters,
But this is BS. There are some filters that are shared, but MB can hardly go back in time and "standardize" things.
For example most of the 61 series Diesels are common filters, as are 60 series Diesels except the 606, Most of the earlier V8's, like the 116 and 117 are common to each other, the 112/113 use the same filter and so on, but no way can MB make one type of filter for all these cars. The guy was just trying to get you out of his face.