Hello, can someone enlighten me here? I had a new cylinder head seal, timing belts etc. renewed on 12.1.2009 at 48269 Km. Now in March the heating started to spin ( cold, sometimes warm etc. ) I got the tip here in the forum. to vent everything once. Then it went a few days. But somehow there was always too little cool water in it, when opening the lid it rose again to max. Today I noticed that only the circulation to the heating became warm but not the Heat exchanger etc. Completely ventilated by expert again and filled up water. After 4 hours started, the thing ran only on 3 pötten. after another 2 hours bad jump, gas given and everything ran again but the water was bagged under min. ( Comes when the lid is opened again ) under the car no water outlet fessable. I have no white exhaust gases and even if only starting oil foam on the oil cover. I would nevertheless tap the head seal, can the nac h a year and about 16000 Km again be through?? Can the o.a. Symtome appear there?? Unfortunately I have changed my workshop bill but the service booklet stamped and signed where the works are listed. Can one use it to the workshop and one has something like guarantee? Thanks in advance Frank