This push button with integrated camera is required to retrofit the VW Tiguan AD1 with Trailer Assist The existing camera is simply replaced This new camera enables the trailer assist function in conjunction with the parking aid Scope of delivery: Push button with camera Note: only for vehicles with reversing camera (PR no. KA2) only for vehicles with towing device (PR no. 1M6) Retrofitting Trailerassist only in conjunction with: Parking aid (PLA) (PR no.: 7X5) Parking aid (PR no.: 7X2) with replacement parking aid control unit, item 41567-P (AD1, AX1) or 42083-P (BW2, BJ2) For coding you need the dongle with item number 41739