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This is very scary indeed. As you correctly pointed out, this can hardly be sudeticus. That said, it is a male with enlarged facets, so both bovinus and spodopterus are off the table as well. Clearly no autumnalis or rectus. So that more or less leave the option of eggeri.

aif you check the wing venation, you can see the first posterior cell is not contracting towards wing margin in sudeticus, and it does in the black antenna male. This supports eggeri.

Eggeri has bern found in the north of France, so Stuttgart is not impossible. Still, I do not dare to make the final call without seeing its belly.

Which is probably too much asked ?

Theo