The door lock assembly was a bit of nuisance as I spent half a day running around trying to find the lock. When found assembly was straight forward.
In contrast, there isn't much help from the manual how to attch the hinge bushings. There are some hints from the spare parts list that indicate that the bushings should be attached to the " upper omega" which means the right and left side of the upper inner frame. And yes, the holes in the bushings match the pre cut holes of the "upper omega". I centred the bushing with two A5 rivets and time will tell (when it's time to install the doors) if this is the right method. Maybe, maybe not.