you are only passing through the the Federal Republic of Germany and will leave the Federal Republic of Germany again as quickly as possible to finish your journey,
… or are only entering the Federal Republic of Germany for up to 24 hours
По идее, тогда не надо ничего, кроме теста за 48 часов до вылета и покинуть гостепреимную Германию в течение 24 часов или as quick as possible to finish my journey ?