Features:Warm Tips: The three products are just some subtle differences between IC and scheme.This filter is universal for multiple car models, small and convenient, easy to operate, with stable performance and reliability.18 in 1 CAN Filter 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.-What You Get : 1x 18 in 1 Universal filter. Type A, Type B, Type C is optional. CAN Filter 18 in 1 for benz and for bmw vehicle list: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 FxxFor 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 the 2 dots together (short circuit) BEFORE connection to the car!The wiring diagram:Black --- GND Red --- +12V.Purple ---L1(CAN_L1) Green ---H1(CAN_H1).Yellow --- L2(CAN_L2) Blue --- H2(CAN_H1). Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.