Can confirm simpa.
-Prepare a list with all your items (not too detailed--> so many boxes with books, so many with laundry, matress, bed, kitchenstuff, wife) with roughly estimated values (in euros)
-Copy of swiss "Abmeldebestätigung"
-Copy of a confirmation of your new "Wohnsitz" (eg Mietvertrag)
-Copy of id/passport may help
the germans are not interested in the fact if you have paid all your taxes but the swiss will be
bear inmind that the swiss can AND will block your bankaccount if you haven t
Beware: you have one year to change your drivers license in germany.