Abstract: A multimedia adapter for a vehicle has a chassis, an audio and video input port, an integrated audio and video output port and an electronic control unit (ECU). The chassis has an outer surface. The audio and video input port is mounted on the outer surface of the chassis and is connected electrically to a multimedia device. The integrated audio and video output port is mounted on the outer surface of the chassis, is connected to an integrated audio and video input port of a vehicle multimedia system. The ECU is mounted inside the chassis, is connected electrically between the audio and video input port and the integrated audio and video output port, processes data from a multimedia device and has multiple input ports, multiple output ports and built-in incoming call detection and encode/decode features.