The water tank is generally behind the air-conditioning condenser. When we open the engine compartment, we can only see the upper cover of the water tank. Only by removing the bumper surround at the front of the vehicle can we clearly see the location of the water tank. The location of the Vision x3 water tank is as shown in the picture. 1. Before adding water, the cooling system, including the expansion tank pressure cap and the upper hose of the radiator must be completely cooled before opening. 2. Slowly turn the pressure cap counterclockwise. If you hear a hissing sound, wait until the sound disappears before opening it again. The hissing sound means there is still pressure inside. 3. Continue to turn the pressure cap and remove it. 4. Fill the expansion tank with an appropriate amount of engine coolant to the position between the MAX and MIN marks of the expansion tank. 5. Start the vehicle, turn on the heater system, and run the electric water pump to remove the remaining air from the system; squeeze the radiator outlet hose to speed up emptying. 6. Observe the engine coolant level in the expansion tank, replenish the engine coolant in time, and keep the engine coolant level between the MAX line and the MIN line. 7. Observe the expansion tank vent. When the engine coolant continues to flow out of the expansion tank vent and the engine coolant level in the expansion tank no longer drops, tighten the expansion tank pressure cap. The engine coolant filling is completed. If the engine coolant level drops significantly in a short period of time, it means there may be a leak in the cooling system. Please contact the 4S store for maintenance as soon as possible. @2019