Agreed....a W113 and R107 are completely different. On that note, you will receive help a lot faster if you ask the question on
www.sl113.org . Do you have a specific question about your wiring? I have a 1968 250SL which is virtually identical to yours with the wire changes for emission changes in July 1969, plus the hard top defroster (not available on 1968 models). Let me know how I can help!
jefferymose@yahoo.com