Generally, no. Any wine can be made sweet, it is a function of how long you ferment the grapes.

(less fermentation would leave some fruit sugars behind)

Pinot Auxerrois is closely related to Pinot Blanc, another that is usually not used for sweet wines.

Moselle wine is produced in three countries along the Moselle River. France, Germany and Luxembourg. They are mainly white and are made in the coldest climates. The most commonly grown grape varieties are Auxerrois Blanc and Muller-Thergau. There are other allowed varieties such as Meunier, Pinot noir, Pinot Blanc, Pinot gris and Riesling. In France around the city of Metz, 1500 hectoliters of wine is generally produced, in Luxembourg 1290 hectares of vines and used to produce wine under the designation Appellation Controlee Moselle Luxebourgeoise. However, in Germany, Mosel is one of the 13 wine growing regions for quality wines. 9080 hectares under vine. The region also includes vinyeards situated on the Saar and Ruwer rivers. See your local Wine Merchant for the best buys