Volkswagen will invest €2.4 billion euros ($2.3 billion) to set up an autonomous driving joint venture with China's Horizon Robotics Inc. to strengthen the automaker's tech presence in its biggest market. The joint venture "will enable us to tailor our products and services even faster and more consistently to the needs of our Chinese customers," said Ralf Brandstaetter, who runs VW's China business. Teaming up with Horizon will help "drive the repositioning of our China business." VW is under pressure to improve its offering in China, its biggest market with roughly 40% of deliveries. Sales last year slid, outpacing an overall drop as the company struggled to keep up with local consumer tastes, particularly on digital offerings with many VW models exasperating drivers with frozen screens and complex functionality.