Beidou Star turns on the heater water tank. Where is the water leaking?

Hello friends, in this case, you should first check whether there is any water leakage on the engine. Also, is there any water leakage in the water tank in front of the engine? If there are none, then you need to consider the heater water tank. I hope my answer can help you. If you have any questions, you can contact me at any time. BBA Mercedes-Benz, BMW and Audi maintenance wishes you a happy life, all the best and lots of money!