The stock airfilter flows like 30% more than you'll ever use.

If you get tired of replacing airfilter brackets and mounts you can try something like :
http://www.superturbodiesel.com/std/cone-cold-air-intake-filter-pipe-question-t-1306.html

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42