Two useful books: a BBB (Big Blue Book) MB published service manual covering Maintenance, Tuning, Unit Replacement for all passenger cars including 230SL and 250SL 63-Oct 67. Covers and binding are intact but showing wear and smudges, interior pages complete and in good order. $100 incl US postage; can ship anywhere else for cost. Haynes Manual is a used issue from 198 7 covering 108, 111, 113 & 114 6cyl carb & FI. $25 incl US postage.