Antifreeze ALPINE C12 Langzeitkuhlerfrostschutz produced ethylene glycol. This is a long-acting anti-freeze. It does not contain harmful substances such as selikaty, nitrites, amines and phosphates. It provides excellent protection against freezing and corrosion throughout the life of the engine. It does not require special maintenance. If suddenly the car was leaking coolant and then water was added the driver, it does not matter - a hydrometer to float to check the temperature of the coolant is measured freezing temperature withstood by the negative and added a similar concentrate based on ethylene glycol (or polyethylene glycol). If there is no place to add (already have the required level, but there is no "desired degrees"), it is necessary to breakdown 1-2 liters of old antifreeze, and in its place add the concentrate. Tolerance: a tolerance MB 325.3, MAN 324 SNF, VW TL 774 D / F