An actuation mechanism for at least partially asynchronously actuating two closure devices of an air flow control assembly for a vehicle, comprising a control element that is/can be connected to an actuator. This is operatively connected via a first coupling part provided for actuating the first closure device and via a second coupling part provided for actuating the second closure device in such a way that a movement of the control element occurring about an axis of rotation can be converted into a shifting of the two coupling parts via a slide controller having corresponding control pins and bearing grooves. The control element having the control pins is integrated at least partially between the two coupling parts which are at least partially overlapping and can be shifted relative to the control element. The control pins engage at least partially into the bearing grooves positioned on the coupling parts.