Hi, threadstarter here. I did not know until now that this thread was still alive. This was several years ago, I do not remember exactly what was done and the car was actually sold today. However, I did manage to find a scan of the car well after I got things to function resonably well. Maybe this could be useful to someone else:

Address 37: Navigation (J0506) Labels: 1T0-035-680.clb
Part No SW: 1T0 035 686 E HW: 1T0 035 686 E
Component: RNS-MID H21 6270
Revision: AB001001 Serial number: VWZ6Z7N9312149
Coding: 06010000010000000000
Shop #: WSC 05314 123 12345
VCID: 364DCFB7811F09F244-8062

Subsystem 1 - Part No: 1T0 919 859 B
Component: EU West V14 8477

Address 77: Telephone (J412) Labels: 3C8-035-730-A.clb
Part No SW: 3C8 035 730 D HW: 3C8 035 730 D
Component: Telefon 022 0946
Revision: -------- Serial number: 35502105030069
Coding: 020000000100010000000001
Shop #: WSC 12345 123 12345
ASAM Dataset: EV_UHVPremi 002708
ROD: EV_UHVPremi_VW32.rod
VCID: 246905FF2F838B62EA-8070