Sectional door and method for replacing a panel of a sectional door

A sectional door, in particular for commercial vehicles, comprises a door leaf (1) made of a plurality of panels (2) which are pivotably held to one another and are movable along at least one lateral guide, wherein at least one panel (2) is designed in multiple parts and is replaceable when the door leaf (1) is closed. The invention furthermore relates to a method for replacing individual panels (2) of a sectional door, so that damage to a panel can be remedied in a short time.