"I've never not played in the Champions League. It's pretty much been standard for me every season," he added.
"Bayern is a wonderful club - I had a great time there and won the Champions League. They are going to be tough opposition and it will be an exciting game for the club."
Calgary-born Hargreaves made his name with Bayern and shone in the
2006 World Cup for England
before joining United in an £18m deal the following year.
He had attracted
interest from West Brom
after United opted not to renew his contract but feels joining City, expected to mount a serious Barclays Premier League title bid this season, is a greater challenge.
Hargreaves, aware competition for places will be fierce, said: "I like to measure myself against the best and I've always taken on challenges - I left Canada for Germany as a kid, I've left comfortable situations.
"It's a fantastic group of players here, and I hope that I'll be a good addition to these guys to help out.
"I've lived in Manchester for four years and this move just fits. You've got to trust your instincts."
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