An apparatus for assembling motor vehicle components, comprising: - a longitudinally extending scaffold structure including a top wall structure and support structure extending downwardly from the top wall structure; - a plurality of pallets (24,50); - a plurality of robots, including inverted robots supported on the top wall structure and extending downwardly from the top wall structure below the top wall structure; and - robot control devices carried on the top wall structure of the scaffold structure, and operatively connected to a plurality of said robots, said apparatus being characterized in that it includes a weld station for welding motor vehicle components, said plurality of robots being arranged for welding subassemblies supported by the plurality of pallets (24,50) transported to the weld station, and in that: - the weld station includes first and second longitudinally extending scaffold structures laterally spaced from one another so as to define an open weld area therebetween for movement of the pallet (24, 50) longitudinally therethrough, - each scaffold structure includes a top wall structure and support structure extending downwardly from the top wall structure and defining an open working space which is comprised within the downwardly extending support structure and below the top wall structure, said open working space being open towards said weld area, - the weld station has at least two longitudinally spaced successive substations (WSS10-WSS20) at said weld area; - a plurality of said inverted robots are positioned within said working space of each respective scaffold structure and are supported by the same top wall structure of the respective scaffold structure in a longitudinally spaced relation, the inverted robots extending downwardly from the top wall structure into the open working space below the top wall structure, and being longitudinally spaced from one another along the respective longitudinally extending scaffold structure and being extendible into the weld area; - said robot control devices are carried on each of said first and second scaffold structures and are operatively connected to said plurality of inverted robots, thus minimizing the amount of floor space for the weld station. - a plurality of pallets (24,50); - a plurality of robots, including inverted robots supported on the top wall structure and extending downwardly from the top wall structure below the top wall structure; and - robot control devices carried on the top wall structure of the scaffold structure, and operatively connected to a plurality of said robots, said apparatus being characterized in that it includes a weld station for welding motor vehicle components, said plurality of robots being arranged for welding subassemblies supported by the plurality of pallets (24,50) transported to the weld station, and in that: - the weld station includes first and second longitudinally extending scaffold structures laterally spaced from one another so as to define an open weld area therebetween for movement of the pallet (24, 50) longitudinally therethrough, - each scaffold structure includes a top wall structure and support structure extending downwardly from the top wall structure and defining an open working space which is comprised within the downwardly extending support structure and below the top wall structure, said open working space being open towards said weld area, - the weld station has at least two longitudinally spaced successive substations (WSS10-WSS20) at said weld area; - a plurality of said inverted robots are positioned within said working space of each respective scaffold structure and are supported by the same top wall structure of the respective scaffold structure in a longitudinally spaced relation, the inverted robots extending downwardly from the top wall structure into the open working space below the top wall structure, and being longitudinally spaced from one another along the respective longitudinally extending scaffold structure and being extendible into the weld area; - said robot control devices are carried on each of said first and second scaffold structures and are operatively connected to said plurality of inverted robots, thus minimizing the amount of floor space for the weld station.