Hello professionals. In the morning my G500 MJ 2016 always shows up the message “Refill coolant, the engine is warm the message is gone. I assume that very little is missing, so that the rise due to heat expansion already enough to wet the sensor again. Now my question: I would have just poured some water back in the past. Now you should do it according to the operating instructions and there is only use of coolant released by MB. I have little time at the moment because of so something at the friendly to beg an appointment, there is something at the tank, ATU, Amazon or similar or just a little Aqua dest.? OpenAirFan