Hello! We are an association that brings relief goods to the needy people in Eastern Europe with my own truck. All the work is financed by donations. Therefore I ask for advice before I go back to the workshop. For a few months our MAN consumes 5-6 liters of cooling water, whether I drive 500km and then fill up or if I drive 5000km and then fill up. Always about 5-6 liters of cooling water, never more. We stayed at MAN, which has all famous, easily verifiable places. On the last auxiliary transport, on the way home from Ukraine, cooled water level checked again. There were about 8 liters missing. After another 800 missing again 8 liters. In the oil (oil measuring rod) there is no water, it is nice black. On the cooler etc I find no cold water traces, even under the vehicle not. There is also no white smoke. The vehicle has a retarder, on the pipes there is also no cooling water loss visible. What could it still be, or wa. I’m looking forward to every tip, because as mentioned, this vehicle is financed by donations and used only for the transport of relief goods to Eastern Europe. (More information: www.dhhn.de) Thank you in advance! Julian