CAN Filter is designed to support old mileage data blocking on Mercedes-Benz vehicles.  It is designed to prevent regeneration of the old mileage state in vehicle dashboard (odometer). CAN filter doesn’t interrupt any vehicle electronic system, there will be no errors or DTC’s after install.
CAN Filter 18 in 1 Support Model:

S (W222) C (W205) V (W447)
S (W221) C (W204) E (W212)
E (W207) A (W176) G (W46)3
ML (W166) SL (R231) GL (X166)
B (W246) CLS (W218) SLK (R172)
SLS (W197) CLA (W117) GLK (X204)