For km filter sync to IKE(IC) break km sync to IC can filter 12 in 1
W221 W204 W207 W212 W166 and X166 ,W218,W172,W246,W176,W117,W156
Instrument filter (Shield EIS, synchronize kilometer to the instrument)
Just connect this filter to the plug behind the instrument (the black cable is 1 pin)