köppel became manager of borussia mönchengladbach ii on 1 july 2004. he became caretaker manager of borussia mönchengladbach on 27 october 2004. dick advocaat was hired as the new manager, ending köppel's interim managerial term, on 1 november 2004. köppel returned to the reserve team on 2 november 2004. köppel became manager of the senior squad after advocaat resigned as manager of the club on 18 april 2005. köppel was sacked on 16 may 2006.