Yes, the design was created by Peter Bauer. The year of construction is not required. Unfortunately it is not an O 3200
There is one more attempt for the right body builder.
Sorry, I believe something is lost in translation. Yes, Mercedes, for sure. However, I read the above to mean that the design was created by Peter Bauer, but the body was built by a different coachbuilder. That seemed strange to me, but that's what I've been looking for. So, "Mercedes" and "Peter Bauer" are correct and you are looking for the model designation? How about O 3750?