Fucking with the KfZ dealer?

Hello all, I want to sell my Grande Punto and stumble now just a little while looking through my purchase documents at the time. I bought a Grande Punto 1.3 MJ Dynamic with DPF, as well as side/head airbags, radio/CD and heat protection glazing. Of course with even more accessories, but this seems to me to be missing! Was an import car from Austria. At that time already a cassette radio was in (works radio), which I had criticized, but did not bother me any further because i Now I noticed that the seats don’t have airbag covers, which they must have. Likewise, my exhaust is totally worn out, despite the alleged DPF? I am absolutely lay and was therefore assuming that everything is okay with the car. I think they have subjugated some basic model here, can it be? How can I verify this to knock on the dealer’s door if necessary – from the basic model to the D ynamic is almost 2000 EUR difference. Thanks & LG