Sorry for lack of informations.A more specific overview of the problem would be a good start.
it is disel fuel and turbo aspirated.Petrol or diesel fuel.
Turbo or normally aspirated.
No, there is no any warnings, the only "warning" is its sound, when you start engineOk that helps.
Any warning lights on when you have the problem .
Currently car is at car sofware mechanic. he's gonna try to find problem. So i'll se. This is 2nd time that he's trying to fix it, first try was unsuccesful, and now is another try (he told me he has new ideas ) He's only one left. Btw i'm from Bosnia.Do you have access to a good diagnostic tool /software.
It is allways a good idea to run diags to check for any fault codes logged first and work from there, saves double guessing a possible fault, it is not fool proof but will give you a better idea where to start rather than just taking pot luck.