A method of repairing a vehicle chassis and/or vehicle bodywork which requires the replacement of a damaged vehicle part with a new vehicle part. The vehicle is clamped to a working bench and the new vehicle part (4), which is to be welded in position for instance, is held firmly in a correct position in relation to the vehicle (1) with the aid of bench-coacting holding devices (5, 18). The bench-coacting holding devices (5, 18) include positionally adjustable means (10, 11, 13) which are intended to coact with specific points of the new vehicle part, the positions of these points in space relative to the vehicle being known. In this regard, the positions in space of the positionally adjustable means are set with the aid of separate measuring equipment. The invention also relates to an arrangement for use when carrying out the method.