Just to confuse the matter.....

I have worked with several of these cars and all the wood seems to be the same until the last years. At one point the instrument binnacle went from being wood to plastic or leather covered. And the story I have heard on this is that Mercedes found one great tree and used it for all the trim for these cars until they ran out.

Then the wood changed to what they had and much of the interior went to plastic or leather.

There are a few people out there that restore this wood. They are not cheap but they may be a good place to start asking questions about what is out there and what is possible.

They might even be able to confirm or deny the 'one tree' story.