Cos d'Estournel is a vineyard and winery in the Saint-Estephe appellation of the Medoc. istorically, the Cabernet Sauvignon-dominant grand vin has had a high percentage of Merlot compared with other Medoc growths, although this has lessened in recent years. The new winery, which was built in 2012, has four vats which can be lifted to allow processes to be gravity-fed. The grand vin is matured for 18 months in new oak barrels; Les Pagodes sees 12 months in new oak whilst Marbuzet and rouge are matured in 50 percent new wood. Annual production of the various wines varies between 200,000 and 380,000 bottles.