If you want the real deal - not knocking those who choose to fabricate their own:
Baum Tools | Audi , BMW, Porsche, Volkswagen, Mercedes, VW, Jaguar, Ferrari
Click on -> Catalogs
Click on -> Download Mercedes Catalog
Item #140-0233 - beware there are 2 pullers with this same part number. You'll need to examine the part description field to ensure it matches your MB model.
A lot of MB dealers will not sell specialty tools. I've purchased all of this type of gear from the Baum site a number of times over the years.