The invention relates to an assembly module (20) for a motor vehicle (1), comprising an optical sensor system (30) which can be used a) to monitor a detection area (150) on the outside of the motor vehicle (1) in order to determine the proximity of a user (10), b) to emit a flash of laser light within the detection area (150), c) to detect a reflection of the flash of laser light (122) from the user (10) and d) to release a signal for carrying out an action on the motor vehicle (1) in the event a user (10) is detected in a predefined actuation area (180) within the detection area (150).
