I think it is a fact of life, or shall we say time, that sees most original dash pads exhibit some form of cracks in some areas, particularly on the edges of the instrument binnacle. Replacement units, like those that have been rebuilt, do stand up very well to the test of time. I have had some Rover units re-done some twelve years ago, and they are still in very good condition. Conversely, MB units as well have shown no trace of damage.
Incidentally, I still have in stock one black unit that I would like to sell. Regards Styria.