This CAN Filter 18 in 1 for Benz and for BMW universal filter should be added to the car after odometer adjustment for most chassis models. But for W222/W205/W447 models, CAN filters 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 Benz Model: 18 types chassis model for benz : S(222), S(221), C(205), C(204), V(W447), E(W212), E(W207), A(W176), G(W463), ML(W166), SL(R231), GL(X166), B(W246), CLS(W218), SLK(R172), SLS(W197), CLA(W117), GLK(X204) NOTICE!! New style: 222/205/217 Old style: 166/212/463 CHECK the car model correctly before mileage adjustment. Old style W166 short circuit to GND New style W222 short circuit to GND Black wire connect to plug 1 2. For BMW Model: For BMW: CAS4/FEM Fxx For BMW 1 series F2X, 3 series F3X, X5 etc., FEM mileage adjustment( no need to remove FEM, connect directly to instrument panel); For BMW 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 the 2 BMW dots together (short circuit) BEFORE connection to the car! Colour:blue & orange Material:ABS The actual product may have slight color difference or difference, which will not affect the use Package Contents: 1 x CAN Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.