They grow up so fast, don't they? It seems like just yesterday (well, 2009) that Daimler bought a stake in Tesla to give it a boost and secure a partner for electric car development, and the German automaker is now selling that stake a mere five years later. According to the company, an investment is simply "not necessary" any more -- Daimler can cooperate with Tesla on EVs without needing a say in its finances. The sale is theoretically a win for both companies. Daimler will pocket about $780 million, while Tesla can attract a wider range of investors.