hello who can help me? I drive an audio 1.4 tdi and for some time now my audio has been going, mostly shortly after the first start in the early morning, in the emergency run and occasionally also in the warm condition. what is striking, the worse the fuel, the more open. drive now the aral super diesel, but also here he goes into the emergency run, but not so often. errors in error storage charging pressure went under. was now at audio, there the turbo was loaded, the charging pressure control valve., fuelf ilter, air filter, all pipes to the turbocharger were checked for tightness. but nevertheless he continues to run occasionally. which EXPERT can help me here? can’t be that I am the only a2 driver with this problem, right? from my loan assessment, there must already be a connection with the quality of the fuel, although my audio is released for biodiesel. ps. tank only brand fuel, also with biodiesel thanks for the help happy Christmas greetings paul