Front-mounted in-vehicle equipment arranged to a front part of a vehicle internal space, rear-mounted in-vehicle equipment arranged to a rear part of the vehicle internal space, and a connection adapted to connect the front-mounted in-vehicle equipment and the rear-mounted in-vehicle equipment is described. Rear-mounted in-vehicle equipment controls the front-mounted in-vehicle equipment via a keyboard or game controller, thereby allowing a passenger to control the front-mounted in-vehicle equipment in a straightforward manner from the rear-mounted in-vehicle equipment instead of the driver operating the front-mounted in-vehicle equipment. The rear-mounted in-vehicle equipment can be denied access to overwriting information related to music data in the front-mounted in-vehicle equipment.