Genuine OEM Audi / VW NOx-reducing agent for diesel engines with SCR-exhaust gas after treatment. This fluid is used in the 2012-2016 NMS Passat TDI, all V6 Touareg TDI, all Q7 TDI, and all Cayenne Diesel models. It is also used in all Mercedes BlueTEC vehicles as well as the BMW 3 series and X5 diesels. 1 liter bottle.