The BBB is officially the Workshop Manual. In the US it is printed by MBUSA. To order, call 1 866 MB Classic (1 866 622 5277).
For the W113 you need two, The Workshop Manual starting August 1959, and the Workshop Manual starting 1968. Sections that are in the first manual are not repeated in the second! Both are also available in a two CD set.
Klaus
1969 280 SL