I have bought a number filters that came in the MB OEM box and Knecht or Hengst was the brand in the box. The air filter housing in both of my TDs say MANN and then a part number for the filter.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section