Late goals from Jeong Woo-yeong and Silas Katompa Mvumpa saw Bayern Munich stumble to a 3-1 Bundesliga defeat at Stuttgart ahead of their Champions League semi-final clash with Real Madrid on Wednesday.Fellow Champions League semi-finalists Borussia Dortmund, meanwhile, cruised to a 5-1 win over Augsburg ahead of their meeting with Paris Saint-Germain on Tuesday. kih/dj