Barcelona are facing a difficult situation, it will be tough for them to beat Bayern Munich and even draw is quite doubtful, they don't have good stats away with Bayern and that was when they still have the best squad. Bad results at the start of the season make them very likely to be eliminated from the UCL this season.
After a 0-0 draw against Benfica which they could have won now Barcelona are in a very difficult situation, and Barcelona must win in their last game against Bayern Munich to ensure qualification for the last 16.
and it seems everyone can judge the performance of both teams during the match who is the best and Bayern Munich will be the favourites, and besides they will still field their best squad which I think Barcelona will be difficult to win even for a draw it seems not easy.
it looks like Benfica will accompany Bayern Munich who won Group E to the last 16 because Benfica against Dynamo Kiev will definitely win.
Barcelona is in a very difficult situation now and no longer depends only on itself but also on other clubs.
For Bayern, the match with Barcelona means nothing in terms of results and their coach may decide to rest some key players and thus maybe help Barcelona.
This is a key game of the season for Barcelona because if they fail to win second place in the group and continue to compete in the Champions League, it will be a huge psychological and financial shock for the whole club.
Realistically, the Europa League is a second-class and less important competition, which big clubs generally want to avoid if they can.