More than eight years after the diesel scandal at German carmaking giant Volkswagen came to light, former VW Group chief executive Martin Winterkorn is to give his side of the story in court on Wednesday. The 76-year-old has been summoned as a witness in the civil proceedings brought by investors at the Braunschweig Higher Regional Court in north central Germany. He is to be questioned about various allegations, some of which date back to 2007. In the proceedings under the Capital Markets Model Case Act, investors have been fighting for compensation since 2018 because they suffered billions in…