Attention! Hot steam may escape when the surge tank is opened. Carefully open the lid of the tank, after closing it with a rag.
1. Carefully open the cap on the coolant expansion tank.
2. Remove soundproofing.
3. Place a trap bath under the motor, e.g. "V.A.G. 1306".
4. Unscrew the drain plug on the radiator and, if necessary, put an auxiliary hose on the neck.
5. Drain the coolant, then close the drain plug.