What really confused me when I visited Munich is that those two S-bahn lines pass through the centre in opposite directions on their way to the airport. The ai

What really confused me when I visited Munich is that those two S-bahn lines pass through the centre in opposite directions on their way to the airport. The airport is northeast of the city. All of the S-bahn lines pass through the centre of the city in a roughly east-west direction, and all the central stations have two S-bahn platforms- one for trains going west, one for trains going east. If you want to take the S-bahn to the airport from the central station, you either take the S8 going east (towards Karlsplatz) or the S1 going west (towards Hackerbruecke).