Hello,
As i said, i took the car to a Bosch Car Service. The diagnose was pretty bad. It seems that at some point of the cars life, someone gave it a "Downpipe" .... which means basically getting rid of the catalyst. Since the ECU tries to read values from the catalyst, but doesn't find any, it trows an error (EML amber comes on).
I confronted the dealer with this tecnical report, and i was told to bring in the car ...which will be fitted with two catalyst missing.