https://www.reuters.com/article/us-tesla-musk-germany/musk-promises-tesla-design-overhaul-ravecave-at-berlin-plant-idUSKBN25U2DG >Tesla's will use its plant in Brandenburg, Germany to demonstrate a radical overhaul of how its cars are built, as well as making electric car battery cells and battery packs, Chief Executive Elon Musk said on Thursday.