How to Replace the Coolant in a Passat?

[McLydia]

The method to replace the coolant in a Passat is as follows: 1. Remove the front grille by unscrewing it directly with a screwdriver; 2. After removing the screws, manually pry it open to reveal the drain port, then unscrew the drain plug with a screwdriver while opening the coolant filler cap; 3. Wait until the colored coolant has mostly drained out, then screw the drain plug back in and refill with new coolant. Coolant prevents the freezing of the liquid in the cooling system during cold winter stops, which could otherwise cause the radiator to crack or the engine cylinder block or head to freeze. There are many types of automotive antifreeze, including inorganic compounds like calcium chloride and organic compounds like methanol, ethanol, ethylene glycol, glycerin, and lubricating oils.