Bayern Munich should start with bringing a solid centre-forward first. Until then they will still be lacking an important player in the attacking line. It isn't the kind of a job that they can do with Mane or Choupo-Moting in this position. They tried this last season but failed after that. Even their winning the Bundesliga title was by chance thanks to Dortmund's huge mistake. If they had a centre-forward like Lewandowski they could have had a much more comfortable run in the Bundesliga and they could have been stronger in the Champions League.
They have made a start by making their first offer for Kane though but this was quite below the price Tottenham wanted for him. Kane or someone else they should solve this problem in the summer.
After leaving by Robert Lewandowski, Bayern Munich faced difficult looking for position leaving by him and right now has rumor only for signing Harry Kane. Last season, Bayern Munich almost failure for winning Bundesliga tittle before fatal mistake made by Dortmund on last games and Bayern become the winner. Center forward is crucial position for Bayern Munich because Sadio Mane can't replace position leave by Lewandowski and he most play well as left or right forward.
Actually Bayern Munich has Choupo-Moting as center forward, but he can't consistent on the top performance and ever scored several goals but got injured and difficult for him back to the top performance. Harry Kane is the best center forward option for Bayern Munich and have reach agreement as soon possible due many teams interested to sign Kane from Manchester United until Real Madrid.