Hi all! Im new to forum..
I have a problem with my Audi A4 B6 2002 Avant Quattro.

I recently replaced my battery and the Airbag light came on. I went to the dealer, and they reset it. But after this the airbag light are coming on after the ignition has been on for 10 minutes every time.

I went to the dealer again and they said that the error might be in multiple parts an they had to replace some parts like kombi-instrument or airbag control unit + engine control unit.

They have no exact conclusion to what is wrong, seems like they just want to replace parts to rip me from money...
Anyone as an idea of what is wrong?