Useful info indeed, thanks
I have now swapped the handle, but the old lock is impossible to get out without removing window frame completely.
The problem is that vcds reads left rear door is locked all the time while others read unlocked.
I tried to disable the safe motor with vcds, it didn't work either. Door still works normally.
I get this code on scan
02115 - Locking Unit for Central Locking
008 - Implausible Signal - Intermittent
Any other ideas to get it working without removing the window frame?