Ordered a "Sugar Free" vanilla latte at McDonald's? A class action filed Monday in federal court in New York says those McCafé drinks contain about 2 to 18 grams of sugar per serving, all of it lactose from whole milk, while federal rules allow the "sugar free" claim only under half a gram. The suit cites McDonald's own website listing 18 grams in a large Sugar Free Vanilla Latte. Here's what the complaint says.