Dave, Can you clear up a question please? My 124 came with the first generation 8-pin diagnostic plug, push button and red LED (Calif version). I understand how the push button/LED works and what the separate pulses indicate. My question--does the early 8-pin connector also allow testing individual pins to get additional DTC as the later 16-pin and 38-pin ones do? If yes, can you direct me to the code key, b/c I've never seen anything but the codes referring to the LED pulses (in 1988, that was limited to 6 or 7 items). I hope my question is clear. Thanks.

__________________
1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't