Dash was not removed.

Heres the status:
- opened the instrument cluster. Replaced all bulbs just in case. No bad soldering. No bad components on the boards.

- experimented with a spare IHKA computer( the one with the 3 colored connectors). Same problem.

- removed the auc sensor and module just in case. Same problem.

- used a computer to read error codes. No errors other than a stratification potentiometer which has been in there for years. All sensors of the IHKA read good values except the interior temperature sensor which reads 60 celsius permanently.

- did whiskeys thing by shining at the lcd display. Odo and P D appear to display properly but with no lighting. The center bar shows an error "check control betriebsanleitung".
- removed the ccm module, checked it out and put it back in. Same error. Looking for a replacement ccm now.

Parts im getting soon are CCM.. spare manual A/C control panel and the parts required to fix the interior temp sensor.

Will let you guys know.