Büttner made only his seventh start this season for Manchester United - and his first in the league since September.
"It was a good feeling. It's a long time since I played a game so it was good for me to play today. I feel good.
"I think defensively I did well. I didn't lose any one-against-ones. For me, that was the thing I wanted to focus on - my defending - and I think I did a good job.
"For me, [Bayern Munich] will be one of the biggest games I've ever played in. I'm looking forward to playing. I think everybody dreams to play against them - me as well - and because I train hard I know my chances will come."
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