You are right, Lucas!
The elements are made by glued laminated veneer, with the separate layers at a 90° angle.
Over the decades humidity and water penetration dissolved the glue, especially in the left and right corners of the dashboard.
Also the coating either cracked or came of.
Repairing this not only requires the expertise of a type of craftsmanship which is hard to find nowadays, but also dedication to the beauty of wood and enthusiasm.
I could convince my neighbour, who is a carpenter, to do this job together with me in his free time. We worked on my sets, but finding some more parts we have 3 LHD sets and 1 RHD set together by now. I may give away one set but only in exchange by a set which can be restored.
But first lets find the right colouring and the apply the layers of coating.
I will report
Door trims often were exposed to water at the triangle window. The handle was often screwed on using high force resulting in a flattening of the wood.
Thomas