AS if Mozart's music wasn't enough to make his name one of Austria's most famous, marketeers have used it to promote the country's best-selling chocolates - the Mozartkugeln. Now, Mozart's name has been used for a line of three liqueurs, which recently became available in Hong Kong's bars. Like other Austrian products in the territory, Mozart Liqueur, Liqueur Capuccino and Amadeus Liqueur are high quality and exclusive. Packaged in their trademark round bottles with shiny foil wrapping, just like the chocolate Mozart balls, they sell as gift items for $228 a bottle in Seibu. Austrian food and drink, in general, has a select market in Hong Kong. Products available include sausage and processed meat, confectionary, beer, wine, champagne and wafer. ''The Manner is the best-selling wafer in town,'' said Peter Riha, whose company, Solar Max, is responsible for putting this traditional Austrian biscuit on the shelves of Park 'N' Shop. He said the market was small because, on the whole, Austrian food and drink was too rich or too strong for local tastes. ''If you've spent the whole day up in the mountains, mowing your hay and planting your potatoes, you need some fortifying food to sustain you. It's not the case here.'' The only Austrian beer available in Hong Kong is Gosser. ''After two Gosser, you really know you've had some beer,'' Dr Riha said. In Austria, beer is big business, with 30 breweries throughout the country. Wine and champagne follow closely behind beer in popularity. The excellent vintage last year put Austrian labels at the forefront of Europe's wine exports for 1992. Experts say the fresh and fruity character of Austrian wine, such as Riesling and Spatlese, is due to the variations between day and night time temperatures, unlike the more constant temperatures in the Mediterranean. The mountain climate also influences the nature of Austria's champagne, known for being low in histamines. This means drinkers avoid headaches, stomach aches and other nasty effects the morning after the night before. Schlumberger, the most widely consumed Austrian champagne in Hong Kong, is available at the Champagne Bar of the Grand Hyatt, Seibu and Oliver's delicatessen. When foreigners think of Austrian food, pastries and apple strudel spring to mind. In Vienna, ornate oak-panelled cafes serve nothing but cakes and pastries all day - and not only tourists indulge. The country's most popular cake is the Sacher Torte, an apricot-filled sponge covered with chocolate, first made for the emperor in the 18th century by the chef at Vienna's prestigious Sacher Hotel. People continue to flock to the hotel just to buy it. The cake is also sent via airmail to connoisseurs around the world. Dr Riha said: ''Austria is unique in terms of pastries and cakes because they have good raw materials for them, which is basically milk from healthy cows grazing on the Alps.'' Because a lot of the country is made up of lush, pollution-free, fertile mountains, many of Austria's raw materials are superb.