Page not found (404)

Request Method: GET
Request URL: http://de.mercatormedical.eu/produkte/nitrylexr-basic-violet-549.html
Raised by: products.views.site.product_detail_view.ProductDetailView

Für die Abfrage wurden keine passenden Produkt gefunden

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.