I drive a Passat Kombi 35i Bj. 1988 – unfortunately have the problem that he loses large quantities of cooling water at longer intervals. Result: Temperature indicator rises to 110 degrees, warning light flashes and I have to refill. I do this two to three times and then the whole thing commutes again. The workshop has not been able to detect a leak in the cooling water system and could not give me any explanation for it otherwise. In winter it is particularly unpleasant, because of course the heating also g I am not sure, but I have the feeling that the loss of water begins especially when rain starts. But it sounds strange for my feeling … Would I be very happy if someone could give me some advice!