The Bosch site has both carbon and dust filters as sub members at the top of their page. Also, this link from the archives 1995 E420 A/C air flow & dust filters
has photos and description of the w124 filter change. When you do yours, you ought to take some digital pics and submit them to Bill Woods as a DIY article like the others at the tab on the page top!
2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)
Click to see 87 300E