Mähdrescher literally translates to "combine harvester". It's a very specific and somewhat unusual word to find in a pop song, making it quite memorable and unique.
In the song, it evokes a vivid, almost nostalgic, image of autumn and rural life. The singer uses it to set a scene, saying, "Wenn im Herbst die Mähdrescher anfangen, dann nimm ich dich mit raus" (When the combine harvesters start in autumn, then I'll take you out), painting a picture of shared moments amidst the changing seasons.
Have you ever been so completely smitten with someone that they're just... everywhere? That's the feeling Philipp Poisel brings to life in "Irgendwann" (Sometime). He's standing on a cold train platform, closing his eyes, and suddenly, "Dann stehst du neben mir" (Then you stand next to me). Or he's on the train, writing their name on the window, and boom, "Dann sitzt du neben mir" (Then you sit next to me).
It's a beautiful, almost dreamlike obsession, where the person he misses is always present in his mind, whether he's swimming in a lake or driving through the autumn fields. He even imagines taking them on his bike, saying, "du siehst blendend aus" (you look dazzling). The thought of seeing them again is so overwhelming that he imagines his breath stopping, or his heart breaking into a thousand pieces. It's clear he can't think of anything else, repeating, "Ich denk an dich, denn was anderes kann ich nicht mehr" (I think of you, because I can't do anything else anymore). Even though he has "keine Ahnung wo / Wir uns irgendwann wieder sehen" (no idea where / We'll see each other again sometime), the hope and the memory keep them close.