I tend to agree with Achim's statement "there are often "internal" cast or (stamped numbers on the part that do not match the entries in the parts list".
I have a spare front manifold with number 127 142 0505 and a spare rear manifold with number 127 142 0708 (or 06). The chassis number of the car from which the parts originated is not known as I have an "Austauschmotor".