This CAN Filter 18 in 1 for and for universal filter should be added to car after odometer adjustment for most chassis models. But for W222/W205/W447 models, should be added before odometer adjustment. This filter is universal for multiple car models, small and convenient, easy operate, with stable performance and reliability. 1. For Model: 18 types chassis model for : S(222), S(221), C(205), C(204), V(W447), E(W212), E(W207), A(W176), G(W463), ML(W166), SL(R231), (X166), B(W246), (W218), (R172), (W197), CLA(W117), (X204) NOTICE!! style: 222/205/217 Old style: 166/212/463 CHECK car model correctly before mileage adjustment. Old style W166 short circuit to GND style W222 short circuit to GND Black wire connect to plug 1 2. For Model: For : CAS4/FEM Fxx For 1 series F2X, 3 series F3X, X5 etc., FEM mileage adjustment( no need to remove FEM, connect directly to instrument panel); For 5 series F10, 7 series F01/02 etc., CAS4 Fxx chassis.( F01, F02, F07, F18, F10, F20, F25, X3 etc., applicable for 9S12 XEP series 5M48H/1N35H). NOTICE! Please connect 2 dots together (short circuit) BEFORE connection to car! Colour:blue & orange Material:ABS The actual product may have slight color difference or difference, which not affect use Package Contents: 1 x CAN Filter Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.