Mertingen  Mertingen is a municipality in the district of Donau-Ries in Bavaria in Germany. Here near the location of "Burghoefe" the important Roman road Via Claudia Augusta was built during the 1st century AD, linking Italy with the Danube river had its northern end. It branched into a Roman military road following the Danube river from its origine in the West to Regensburg in the East. The Zott dairy company has its headquarters and factory in the town.