They have a QR code you can scan in their menu that takes you to a pdf listing the allergens in each of their foods. I got the Berliner Currywurst with a salad (at this point, according to the pdf all of the salad dressings offered are okay).
Not sure about cross contamination, but I asked about French fries (pommes), and the waitress wasn’t sure so I went with the salad.
My food was fine, but not my most favorite thing. I would have preferred a spicier curry sauce :)
— Some
— Good