Car operates fine, though there are known issues with the passenger seat belt being jammed, a bad expansion valve in the A/C, and a few other things. Anyhow, I checked for diagnostic codes and found a bunch.

At a minimum, I am hoping that someone can explain which systems correspond to which pins on the diagnostic connector. I know that #3 is the CIS-E and #6 is the SRS, but have no clue what the others are. Further, if someone has a spreadsheet or text document with the interpretation of these codes I would much appreciate that too.

Finally, was thinking about a simple circuit that could drive a pair of L.E.D. displays to count the diagnostic pulses automatically. Would cost about $7 in electronic components and another $3 for a nice little enclosure. Would be simple to make. Anybody interested? Probably not worth the trouble, but hey?

Bob Terry
1964 220SE coupe
1969 280SL auto
1969 280SL manual
1990 300SL manual