Ettlingen, plant 4 Due to the increased demand for space in the Mechanical and Plastics Technology business units, these are being enlarged, with the addition of a further plant in Ettlingen. Following a further increase in production space in 2020, the Plant 4 site now has a total area of 9,000 m², equipped with state-of-the-art automated production technologies, such as injection molding machines, milling machines, bending machines, spot welding systems and welding robots.