The trims on the modified W201s and W124s came with dark chromes/smoked window and door trims. When mercedes added the lower body panels, they changed the gray matt trims for smoked ones. There are two colors available (there is a difference!!!), one is bronze-like, and the other is more towards black chrome/smoked...
I presume that your car has the bronze trims and that they ordered the black chrome trim?
The only W201/W124 that came with black (matt) window trims was the 190E 1.8
with a minor 600+k