Marelli Holdings Co, a Japanese auto parts supplier owned by private equity firm KKR & Co , said on Friday it filed for court-led rehabilitation proceedings after a voluntary debt workout failed to gain full support. Marelli, a key supplier for Stellantis and Nissan Motor Co, was created in 2019 after Fiat Chrysler Automobiles sold its car parts unit Magneti Marelli to Calsonic Kansei for 5.8 billion euros (.5 billion).