The invention relates to a mounted module (20) for a motor vehicle (1), comprising an optical sensor system (3) that is suitable for a) monitoring a detection area (21) located outside the vehicle (1), b) triggering a signal for starting an authentication process between an ID generator (13) and the motor vehicle (1) if a user (10) is detected in the detection area (21), c) monitoring an actuation area (22) which is located outside the vehicle (1) and differs from the detection area (21), d) providing an operating signal for the vehicle (1) if a user is detected in the actuation area (22).