Sorry for the English but my German knowledge is not adequate enough, I can sort of understand other comments, but writing would be very hard

I come from Hungary and I have a 2005 A4 B7 2.0 TDI Multitronic. I bought it off my uncle in 2016 and it has a very shady service history, because he didn't keep any records of anything and always took it to the cheapest places


Lots of useful info here, hope I will be able to get answers for my questions.
Regards,
Dan