Support device for an external cladding part of a motor vehicle, comprising - a support for receiving the external cladding part, which comprises at least one receiving shaft which extends in the vertical direction and has an inner toothing; - at least one support finger which can be inserted into the receiving shaft and which comprises an external toothing on the lateral surface thereof and an end-face support region at a lower longitudinal end for supporting the support finger in the vertical direction on a support part of the motor vehicle; - wherein the support finger is rotatable relative to the receiving shaft, about the longitudinal axis thereof, between a release position and a fixing position; - wherein, in the release position, the external toothing and the internal toothing are not in engagement, such that the support finger is movable in the vertical direction relative to the receiving shaft; - wherein in the fixing position, the external toothing and the internal toothing are in engagement, such that a movement of the support finger in the vertical direction relative to the receiving shaft is blocked, - wherein the support comprises an anti-rotation element which is designed to hold the support finger in the fixing position, characterised in that - the anti-rotation element comprises a flexible securing arm having a recess; - the support finger comprises at least one radial protrusion; - by rotating the support finger from the release position into the fixing position, the radial protrusion first bends the securing arm away and, upon reaching the fixing position, enters the recess, snapping back the securing arm. - a support for receiving the external cladding part, which comprises at least one receiving shaft which extends in the vertical direction and has an inner toothing; - at least one support finger which can be inserted into the receiving shaft and which comprises an external toothing on the lateral surface thereof and an end-face support region at a lower longitudinal end for supporting the support finger in the vertical direction on a support part of the motor vehicle; - wherein the support finger is rotatable relative to the receiving shaft, about the longitudinal axis thereof, between a release position and a fixing position; - wherein, in the release position, the external toothing and the internal toothing are not in engagement, such that the support finger is movable in the vertical direction relative to the receiving shaft; - wherein in the fixing position, the external toothing and the internal toothing are in engagement, such that a movement of the support finger in the vertical direction relative to the receiving shaft is blocked, - wherein the support comprises an anti-rotation element which is designed to hold the support finger in the fixing position, - the anti-rotation element comprises a flexible securing arm having a recess; - the support finger comprises at least one radial protrusion; - by rotating the support finger from the release position into the fixing position, the radial protrusion first bends the securing arm away and, upon reaching the fixing position, enters the recess, snapping back the securing arm.