Diagnostics for R129 119.972
 

Yesterday I finally connected a fault code reader to my 500SL and how exciting - I can extract real time data, from battery voltage to injector timing - I can't wait to plot this. Oh, and no fault codes were stored either

However, the only ECU module I could communicate with was the LH-SFI unit.

Bear in mind my car was actually built in December '92 but I think MB changed the engine to the 972 in October/November, so maybe they didn't update some of the ECUs??

I've read that some systems are split analog/digital so perhaps some of my modules are analog (bar the LH system)??

Perhaps it's best to contact the manufacturer of the fault code reader for their advice?? I'll let you know, but if anyone else has any more info then please let me know.

Cheers

Lea

may be a little late but im going thru a process of trying to talk to my 1992 300sl ,fitted with 16 pin connector is there any way of converting this from obd2 to 16 pin protocol . i have various obd2 kits including elm and tacho pro .also which program would be best ?where can i get it?
thanks for your time