Tesla's sales in Europe are plummeting — and now Elon Musk has a warning for employees at the company's German megafactory ahead of crucial union elections. In an interview with Giga Berlin senior director Andre Thierig posted on X on Thursday, Musk said Tesla would "ideally" expand its only European gigafactory and start production of its battery cells, Cybercab robotaxi, and Optimus robot at the site. Asked if he had any advice for the team at Giga Berlin to work toward that vision, Musk said