It didn’t last long until the engine control light turned on. At the Volvo I am used to it, which is always connected to the Lamda probe. And the camshaft adjustment is the causer. At the VW Passat P2181, the thermostat. At first very pleasant. Had already noticed that the heating didn’t really want to get in motion. Can’t be a big problem. The thermostat then did not find at all. Then looked at YouTube. The procedure is almost incomprehensible. One has to expand the alternator to get there. And since the one is sitting at the bottom of it, the whole coolant runs out of it. Time to change, and to move that into the spring.