For a shop manual, I recommend an alldatadiy subscription. You will get the wiring diagrams as part of it. If you go to the benzworld.org 129 forum you will see a sticky that will point you at a site where you can download an owner's manual.

Lastly, get yourself a EPC subscription, a huge help in ID'ing parts at https://epc.startekinfo.com/epc/home.jsp

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe