Hi Schnitzer,
There are no "cards" in the cluster that could have been changed.
While proceeding the test-routine the correct FIN (Fahrgestellnumer) of the car should come up!
Otherwise the code-plug (Codestecker) must have been changed. It is quite easy to check:
- Disconnect the battery
- Remove the two philips screws in the top of the instrument cluster
- Pull the cluster out
- Eyeballing
Now you should see that:
If the code-plug had been changed (or simply pulled out and reinstalled (for what ever reason)) the plastic-sealing is broken/missing! Now it's time to get suspicious!
The code-plug changing procedure is as follows:
HTH
David.