In 1718, she was elected Princess-Abbess of Quedlinburg. However, the
Kings in Prussia, who obtained the guardianship of the abbey-principality as electors of Brandenburg in 1698, tried to impose their authority over this small state of the
Holy Roman Empire by attempting to influence the election of new princess-abbess in favour of their own relatives. Marie Elisabeth was elected several times during the
interregnum, while the abbey-principality was ruled by the provost
Countess Maria Aurora von Königsmarck, but King
Frederick William I of Prussia refused to consent to each election and
Holy Roman Emperor Charles VI consequently refused to confirm the elections. The election, however, eventually went ahead but the selection of a duchess of Schleswig-Holstein-Gottorp instead than a princess of Prussia caused quite a stir. Due to her territorial disputes with the King in Prussia, Marie Elisabeth turned to the Holy Roman Emperor, but without success. ==Death==