They apparently played two shows in Saarbrücken in 1979. The first one was in February during the Live Killers tour. That show took place at the Saarlandhalle. Unfortunately there is no recording of this show available.
In August 1979 after they had finished the Japanese leg of the Jazz Tour and before the Crazy Tour began they played in Saarbrücken again. This time at the Ludwigsparkstadion. That was the famous show where Roger had the "hair accident" and there is also a recording of that show.