The match between Galatasaray and Copenhagen will be the key. Man United only has a chance to qualify if the match ends up with a draw. But if it doesn't end up with a draw, Man United has no chance to finish in 2nd place.
Man United might be able to qualify if Copenhagen draws with Galatasaray, but is it possible for Man United to beat Munich, which is said to be the strongest club in the UCL, that is clearly impossible unless Munich underestimates Man United too much and plays their second tier players to help make things easier. Man United will qualify for the next round if in the end Copenhagen and Galatasaray draw.
If I were a Man United supporter, I probably wouldn't really expect them to qualify for the next round even though they managed to win against Munich, they still have a lot to change from their squad and they also need a lot of mature strategies to make Man United ready for the UCL match, to be honest Man United is not very ready for the UCL this season. I'm sure they will fail.
I still think that Bayern may end up pulling the plug for United, I mean yes Bayern did end up with a draw against Copenhagen, and that happened right after they guaranteed their position at the top, so people seriously think that Bayern has given up, and may just play the young kids and all that, but that doesn't feel like the reality, we should be considering the situation as semi-important and it could be quite troublesome job at the end.
I feel like we need to provide something that would be quite entertaining for the viewers and make Bayern a possibility of losing, which makes all the other three teams still have a chance to be second or last, every team could be second or last, that's a real entertainment right there.