In the Dortmund game, who are probably the closest stylistically to us in Germany, Bayern looked to struggle with pressure on their defenders. Reus was closing them down at lightening pace and forcing errors time and time again and that's from the strong side of their defence.
Munich are ridiculously solid in midfield and lightening on the break. If we play 'take it slowly, probe around, pass backwards' nonsense, we are going to get battered. But if we take the game to them, I reckon that we can score quite early and win by two clear goals in the first leg.