Axxess AX-AM-AU91 Rearview/Front Camera Interface for 2013-Up Audi A3/A4 VehicleAxxess AX AM AU91 Audi A3 and A4 HDMI and Camera input interface Features: Fits select 2013 2018 Audi A3 with 5. 8 QVGA color display and 2015 2018 A4 with MMI 7 color screen Must be used in conjunction with the Ax Addcam interface (Sold separately) Factory Audi radio must have AUX input for this unit to work Manual camera selection via vehicle infotainment controller Interrupts the factory LVDS screen connection Retain factory back up camera if