Hallöchen, once again me has finally caught the bock… Stand last Friday at the washroom and I looked at my diesel pre-filter (is the heated water separator, the big one) and I saw the below all red is in the display glass. So off into the workshop tub and let off the soup once… It smelled like coolant!!! And I have regularly coolant loss in the last 2 weeks 4 liters of water after tilted at a mileage of approx. 4000-5000km. Water loss of the vehicle has always been told me. No one has cared about it. How can it be that the cooling water comes into the diesel tank or into the fuel tank? (Diesel main tank is always closed) Can it also be that the vehicle has too little leeway or does not pull? Can it also be that the Exorbitant high fuel consumption of it comes from it (49,28litres to 100km) ? Vehicle is: Actros Mp2 1841 ez: 24.4.2009 EDkm: 450 000