Parts Catalog
This section is part of Documentation.
Among the documents given to a new owner was a Parts Catalog (or Catalog "B") with detailed drawings of spare parts that were available at the time for that car. The drawings a very useful identifying individual components of a larger, more complex part but the booklets do not contain the actual part numbers for the individual parts shown in the diagrams. These half-sized booklets came in different colors for different car models and their ID number starts with 12 (12XXX). For dealers and authorized repair shops complete spare parts lists with part numbers were available from the factory. The ID number of those books starts with 10 (10XXX).
Here is a picture of a 230SL and a 250SL-280SL Catalog "B":
