It is inter alia disclosed an apparatus (1; 3) with a detecting means (2) for detecting whether a transport unit (4) to be transported by a vehicle is secured by at least one securing means (5; 7) against a movement in at least one direction relative to the vehicle, and with a means (10; 30) for changing an operating mode of an electronic device associated with the transport unit (4) depending upon a result of the detecting, or for outputting a signal for changing the operating mode depending on a result of the detecting. Moreover, a corresponding method (200; 300; 400), a corresponding computer program and an apparatus (1′) for receiving the output signal and for changing the operating mode on the basis of the received signal are disclosed.