Remove the blue locking clip from the middle of the fibre optic housing. Strain the hook carefully with a sharp tool, while pulling out the optical fibre from the housing. 1b. 1c. Installation Type 1: Vehicles supporting multiple CD changers and equipped with a CD changer • Audi A4/S4/RS4/A5/A6/S6/RS6/A8/Q7 with MMI-2 High (colour) These vehicles allow selection of Gateway audio sources and the original CD changer through the existing car audio controls. 1 Introduction Gateway 500 emulates a CD