The invention relates to an activation device for a door or flap of a motor vehicle, comprising an external actuation lever (1), an actuation lever (10) for opening a lock, and a coupling lever (13) enabling the external actuation lever (1) and actuation lever (10) to be coupled together, and a control lever (10) which controls the coupling of the coupling lever (13) in accordance with the acceleration of the external actuation lever (1). An undesired opening of a door or flap can be prevented in the event of a crash, without the actuation device accepting excessive stresses.