The author and I have spoken by email many times . I think his books are a
good value and would encourage new owners to read as much up on the
SL series before jumping in . there is much to be learned, as we do not
possibly now every thing, so we must know a little or a much as me can
if we are aiming for a Mercedes-Benz W113 Pagoda.
Two authors I recommend are:
1) Bernd S. Koehling Mercedes series from early 1950 to present offers E-book
2) brain Long SL series W113 SL, R-107 & R129 each are separate publication's no e-books
their are other publication but some are gone , I would continue to check wit Amazon or
EBay
Bob Geco