Hello, every few weeks or about 1500km the above message in the driver’s display comes. I could then pour a little bit (estimate such a coke can), then the message disappears again. But I don’t discover a leak in the cooling system anywhere. I don’t have any oil increase and he doesn’t smoke white at the start. Does that happen more often, or is the 270er known for it? Should I just ignore or what is to be done? Groetjes Carsten