Bayern came from behind to thrash Borussia Monchengladbach in their first Bundesliga game since wrapping up a sixth consecutive title.
Jupp Heynckes, who will be replaced by Niko Kovac at the end of the season, rested several first-team players and saw Josip Drmic put Gladbach ahead.
But Sandro Wagner scored twice from Thomas Muller crosses to put Bayern 2-1 up before Thiago netted from close in.
David Alaba smashed home from 20 yards and Robert Lewandowski added a fifth.
Treble-chasing Bayern face Bayer Leverkusen in the German Cup semi-final on Tuesday – and Real Madrid in the Champions League last four the following week.