A multipart medical engineering system, which comprises at least two components that can be connected via positioning-determining connection feature (410, 411). At least one component (44) is intended to remain in the vicinity of the patient in the connected and unconnected states of the system and at least one component (41) can be removed or replaced with other components in the unconnected state. The component (44) intended to remain in the vicinity of the patient contains a data storage element (45) that can be written to and read via an interface (46) that is mechanically integrated in the position-determining connection means (410, 411).
