No wonder Roberto Mancini's head slumped in the Allianz Arena dug-out at one stage. City's Champions League challenge is suddenly in danger of being snuffed out after the first defeat of the season.
The opening draw at home to Napoli was a classic case of settling into this most demanding of competitions, but losing to the German champions means victory is now vital against visitors Villarreal next month.
Two strikes from in-form Germany hit man Mario Gomez before half time erased City's early confidence and leave them vulnerable now in a Group A that was always going to be the toughest ask.
Goalkeeper Manuel Neuer's last meeting with the Blues had resulted in him leaking goals to Benjani and Stephen Ireland in a 2-0 Uefa Cup defeat for his old club Schalke in November 2008.
But after two first-half goals from Bayern's own "Super Mario", City were always facing an uphill struggle against the Bundesliga leaders, who had not conceded a goal in the last nine matches.Read full match report
UEFA Champions League
As of: 27 September 2011, 9:47 PMView full league table
- Duration: 93 minutes
- Home possession: 54%
- Away possession: 47%
- Home: 11
- Away: 4
- Home: 11
- Away: 20
- Home: 0
- Away: 0